GOLF BALL MARKER SYSTEMS FOR MARKING THE POSITION OF A GOLF BALL

BACKGROUND OF THE INVENTION

[0001]Golf is a precision sport played on carefully maintained courses, where players attempt to hit a golf ball into a series of holes using the fewest possible strokes. A typical golf course consists of 18 holes, each featuring a teeing ground, a fairway, hazards, and a putting green surrounding the actual hole or cup. The putting green, where players complete each hole, requires particular precision and adherence to specific rules.

[0008]The Rules of Golf, as established and maintained by the United States Golf Association (USGA) and The Royal and Ancient Golf Club of St Andrews (R&A), provide specific guidelines for marking and lifting balls on the putting green. These rules ensure fair play and maintain the integrity of the game.

[0012]The position of the ball must be marked before it is lifted, and the marker must remain in place until the ball is replaced. Significantly, if a player fails to remove the ball marker prior to making a stroke, adjusts the marker after the ball has been lifted in such a manner that the original spot is not continuously marked, or otherwise marks the ball incorrectly, the player would be in breach of Rule 14.1.

[0013]Additionally, Rule 9.7b addresses the handling of ball markers on the putting green. If a player lifts their ball-marker or causes it to move when the ball is lifted and not yet replaced, the player would breach this rule. This underscores the importance of maintaining the marker's position to ensure accurate ball replacement.

[0021]The golf industry has seen various attempts to improve upon the basic coin-style ball marker, including markers with alignment aids, magnetic features, and custom designs. However, these improvements often focus on single aspects of ball marking without addressing the complete range of challenges faced by golfers during play.

[0022]A significant challenge in golf relates to properly aligning putts on greens with complex contours. The slope and undulation of putting greens can significantly affect the path a ball will travel, making proper alignment crucial for successful putting. Golfers typically get their best perspective of these contours when viewing the green from a distance and particularly from behind the ball, where elevation changes and slopes are more readily apparent. However, when a golfer assumes their putting stance over the ball, this perspective is lost, making it more difficult to maintain awareness of the optimal putting line that accounts for the green's contours.

[0023]The process of reading greens and determining the proper putting line often requires viewing the putt from multiple angles and distances. Traditional ball markers provide no assistance in translating the golfer's read of the green's contours into proper alignment when setting up for the actual putt. This creates a disconnect between the golfer's initial read of the green and their ability to execute a properly aligned putt.

[0024]There remains a need in the art for an improved golf ball marking system that not only complies with all applicable rules of golf but also enhances the player's ability to accurately mark, remove, and replace their ball while providing additional benefits such as improved alignment capabilities based on green contours and reduced risk of accidental movement. Such a system should enable golfers to better translate their read of the green's contours into proper putt alignment while remaining easy to use, reliable, and compatible with standard golfing practices, thus offering meaningful improvements over traditional ball marking methods.

SUMMARY

[0025]The following presents a simplified summary in order to provide an understanding of some aspects of the disclosed subject matter. This summary is not an extensive overview of the disclosed subject matter, and is not intended to identify key/critical elements or to delineate the scope of such subject matter. A purpose of the summary is to present some concepts in a simplified form as a prelude to the more detailed disclosure that is presented herein.

[0026]The present invention provides systems and methods for marking the position of a golf ball on a putting green while facilitating improved alignment capabilities. Various embodiments of the invention address the challenges faced by golfers in accurately marking ball position and determining proper putting alignment based on green contours.

[0027]In one aspect, a ball marker system includes a first marker disc and a second marker disc. The first marker disc includes a spike configured to anchor the first marker disc to the ground. The second marker disc, which is larger than the first marker disc, includes a marker receptacle configured to receive the first marker disc. The marker receptacle allows the second marker disc to rotate relative to the first marker disc along a vertical axis that passes through the center of the first marker disc.

[0028]In some embodiments, the second marker disc includes a second marker alignment indicator. This alignment indicator can assist golfers in visualizing putting lines based on green contours when viewed from various positions around the ball location.

[0029]The marker receptacle may be configured to receive an entire head portion of the first marker disc. In certain embodiments, the marker receptacle includes a marker channel configured to allow the second marker disc to rotate around the first marker disc while the first marker disc is inside the marker channel. The marker channel may include an opening configured to allow the first marker disc to enter the marker channel when the vertical axes of both marker discs are aligned and the discs are in an engagement orientation.

[0030]The system may be configured such that the marker receptacle receives the head portion of the first marker disc when the second marker disc is positioned in an engagement orientation. Once engaged, the marker receptacle holds the first marker disc in place when the second marker disc is rotated away from the engagement orientation while the head portion of first marker disc remains inside the marker receptacle.

[0031]In some embodiments, the marker receptacle includes a shelf that extends along a disc bottom surface of the second marker disc. This shelf forms a channel bottom surface of the marker receptacle and creates a marker channel. The marker channel is configured to guide the first marker disc into the marker receptacle and retain it within the marker receptacle as the second marker disc rotates relative to the first marker disc.

[0039]The invention provides several advantages over traditional ball markers. The rotating functionality allows golfers to mark their ball position in compliance with the Rules of Golf while providing enhanced alignment capabilities. The two-piece design with interlocking components offers improved stability and reliability compared to conventional markers. Additionally, the magnetic retention feature helps prevent accidental displacement of either marker component during use.

[0040]These and other features and advantages of the present invention will be better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0041]The detailed description is described with reference to the accompanying figures.

[0042]FIG. 1 illustrates an exploded perspective view of a golf ball marking system according to embodiments of the present invention.

[0043]FIG. 2 illustrates a left view of a first marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0044]FIG. 3 illustrates a cross-sectional view A-A of the first marker disc of FIG. 2 useful in a golf ball marking system according to embodiments of the present invention.

[0045]FIG. 4 illustrates a magnified view of section B from the cross-sectional view of FIG. 3.

[0046]FIG. 5 illustrates a top view of a first marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0047]FIG. 6 illustrates a left view of a first marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0048]FIG. 7 illustrates a left view of a second marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0049]FIG. 8 illustrates a cross-sectional view C-C of the second marker disc of FIG. 7 useful in a golf ball marking system according to embodiments of the present invention.

[0050]FIG. 9 illustrates a magnified view of section D from the cross-sectional view of FIG. 8.

[0051]FIG. 10 illustrates a magnified view of section E from the cross-sectional view of FIG. 8.

[0052]FIG. 11 illustrates a bottom view of a second marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0053]FIG. 12 illustrates a left view of a golf ball marking system according to embodiments of the present invention.

[0054]FIG. 13 illustrates a left view of a golf ball marking system according to embodiments of the present invention.

[0055]FIG. 14 illustrates a cross-sectional view F-F of a golf ball marking system shown in FIG. 13 according to embodiments of the present invention.

[0056]FIG. 15 illustrates a top view of a second marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0057]FIG. 16 illustrates a top view of a first marker disc useful in a golf ball marking system according to embodiments of the present invention.

[0058]FIG. 17 illustrates a side view of a golf ball marking system according to embodiments of the present invention utilized in conjunction with a putter handle grip.

DETAILED DESCRIPTION

[0059]The current disclosure provides exemplary systems, apparatus, methods, etc. for marking the position of a golf ball according to embodiments of the present invention. FIG. 1 illustrates an exploded perspective view of a golf ball marking system (100) according to embodiments of the present invention.

[0060]The golf ball marker system (100) of FIG. 1 includes a first marker disc (102) and a second marker disc (110). Each disc is characterized by a substantially flat, thin, and generally but not necessarily circular shape. The first marker disc (102) includes a spike (104) designed for anchoring the first marker disc (102) to ground, such as a putting green surface. The spike (104) may be formed from stainless steel, hardened aluminum, or other corrosion-resistant metal suitable for repeated insertion into turf without degradation. The first marker disc (102) may be constructed from various durable materials including metals (such as brass, stainless steel, or aluminum), high-impact plastics, or composites, providing sufficient weight and durability for frequent use on golf courses.

[0061]The second marker disc (110) is larger in diameter than the first marker disc (102) and includes a marker receptacle (112). While both discs maintain a generally circular shape, they may incorporate slight variations or features along their perimeters while remaining substantially disc-shaped overall. The marker receptacle (112) of FIG. 1 is configured to receive the first marker disc (102) in a manner similar to a key entering a keyhole—the first marker disc (102) can only be inserted when aligned in a specific engagement orientation (124A,124B,124C,124D). In FIG. 1, the specific engagement orientation (124) is shown by lining up the corners or notches of the first marker disc (102) with the opening in the marker receptacle (112) of the second marker disc (110). This key-hole style engagement mechanism ensures precise alignment during assembly while preventing unintended separation during use. The second marker disc (110) is specifically designed to allow rotation relative to the first marker disc (102) along a vertical axis (114 of FIG. 12) that passes through the center of the first marker disc (102) once engaged. The second marker disc (110) may be constructed from similar materials as the first marker disc (102), though it may additionally incorporate softer or grippier materials along its outer circumference to enhance handling.

[0062]The marker receptacle (112) is dimensioned to receive an entire head portion (118) of the first marker disc (102) and includes a marker channel (120). This marker channel (120) is engineered to allow the second marker disc (110) to rotate smoothly around the first marker disc (102) while the first marker disc (102) remains securely locked within the marker channel (120), similar to how a key remains captured in a lock cylinder while turning. The marker channel (120) features specialized openings (122A,122B) specifically configured to allow the first marker disc (102) to enter only when the vertical axis of both discs align and the components are placed in the engagement orientation (124A,124B,124C,124D). Once the first marker disc (102) is inserted through the opening (122) and the second marker disc (110) is rotated away from the engagement orientation (124), the first marker disc (102) becomes captively retained within the marker channel (120), preventing separation of the discs except when returned to the specific engagement orientation (124A,124B,124C,124D).

[0063]A notable feature of the marker receptacle (112) is its ability to receive the head portion (118) of the first marker disc (102) when the second marker disc (110) is positioned in the engagement orientation (124A,124B,124C,124D). Once engaged, the receptacle securely holds the first marker disc (102) in place even as the second marker disc (110) is rotated away from the engagement orientation (124A,124B,124C,124D), maintaining this secure hold while the head portion (118) remains inside the marker receptacle (112).

[0064]In the example of FIG. 1, the first marker disc (102) features a smooth outer circumference (134), which may be polished or treated for enhanced durability and aesthetic appeal. In contrast, the second marker disc (110) incorporates a textured outer circumference (136), which may be knurled, grooved, or otherwise patterned to provide improved grip and handling characteristics during use.

[0065]FIG. 2 illustrates a left view of a first marker disc (102) useful in a golf ball marking system (100) according to embodiments of the present invention. The first marker disc (102) of FIG. 2 includes a head portion (118) and a spike (104) configured for anchoring the first marker disc (102) to ground (106 of FIG. 6). In the illustrated embodiment, the overall height of the first marker disc (102) is approximately 0.65 inches, with the head portion (118) having a thickness of approximately 0.08 inches. The head portion (118) has a diameter of approximately 0.95 inches.

[0066]The spike (104) of FIG. 2 extends downward from the bottom surface of the head portion (118) and is configured along a vertical axis (138) passing through the center of the first marker disc (102). The spike (104) of FIG. 2 extends approximately 0.57 inches downward from the head portion (118). While the illustrated embodiment shows a single centrally-located spike (104), other embodiments may incorporate multiple smaller spikes extending downward from the bottom of the head portion (118). These alternative spike configurations may be arranged in various patterns and need not necessarily align with the vertical axis (138).

[0067]The head portion (118) of FIG. 2 includes a smooth outer circumference (134) that promotes easy handling and maintains a clean appearance. A distinctive feature of the head portion (118) is a head notch (148) formed in its circumference. The head notch (148) is configured as a sector removed from the otherwise circular head portion (118), where the sector is defined by the plane enclosed by two radii extending from the center of the head portion (118) and an arc between them. This head notch (148) serves as a key feature that enables the first marker disc (102) to engage with the marker receptacle of a second marker disc. The perimeter shape of the head portion (118), including the head notch (148), corresponds precisely to the opening profile of the marker channel in the marker receptacle, creating a keyed engagement mechanism between the two components.

[0068]The first marker disc (102) incorporates specific dimensional relationships that enable improved functionality. As shown in FIG. 2, the head portion (118) maintains a consistent thickness of 0.08 inches, which provides sufficient structural integrity while maintaining a low profile that minimizes interference with play. The overall height dimension of 0.65 inches ensures adequate ground penetration by spike (104) while maintaining proportions appropriate for a golf ball marker. The 0.95 inch diameter of head portion (118) is selected to provide sufficient surface area for visibility and handling while remaining compact enough for practical use on the putting green.

[0069]FIG. 3 illustrates a cross-sectional view A-A of the first marker disc (102) of FIG. 2 useful in a golf ball marking system (100 of FIG. 1) according to embodiments of the present invention. FIG. 3 illustrates the head portion (118) and a spike (104) configured for anchoring the first marker disc (102) to ground (106 of FIG. 6). The head portion (118) has an overall diameter of 0.87 inches, which is smaller than the overall diameter described with reference to FIG. 2 because the head portion (118) is not perfectly circular. The head portion (118) of FIG. 3 includes a centrally-located magnetic component (142) configured to retain the first marker disc (102) within the marker receptacle (112 of FIG. 1).

[0070]The magnetic component (142) is housed within a cylindrical cavity formed in the head portion (118). This cavity has a diameter of approximately 0.2 inches and a depth of 0.05 inches and is centered along the vertical axis of the first marker disc (102). The magnetic component (142) may comprise either a permanent magnet or a magnetically attractive material configured to magnetically couple with corresponding features in the marker receptacle (112) to provide additional retention security during use. When implemented as a permanent magnet, the magnetic component (142) may comprise materials such as neodymium iron boron (NdFeB), samarium cobalt (SmCo), or ceramic (ferrite) magnets. Alternatively, when implemented as a magnetically attractive material, the magnetic component (142) may comprise ferromagnetic materials such as iron, nickel, cobalt, or their alloys. In some embodiments, magnetic stainless-steel alloys may be particularly suitable due to their corrosion resistance properties. The selection between a permanent magnet or magnetically attractive material for the magnetic component (142) depends on the corresponding magnetic configuration within the marker receptacle (112), as only one of the engaging surfaces needs to be a permanent magnet to achieve the desired magnetic coupling.

[0071]The magnetic component (142) may be secured within the cylindrical cavity using various retention methods. In one embodiment, the magnetic component (142) is press-fit into the cavity with an interference fit that prevents movement or dislodging during use. Alternative embodiments may employ adhesive bonding using epoxy or other weather-resistant adhesives to secure the magnetic component (142). In yet other embodiments, the cavity may include a slight undercut or mechanical retention features that allow the magnetic component (142) to be snap-fit into place during assembly. The specific retention method may be selected based on manufacturing considerations and the materials used for both the magnetic component (142) and the head portion (118).

[0072]The cross-sectional view of FIG. 3 reveals several precise engineering features of the spike (104). The spike (104) includes a tapered profile with specific dimensional transitions. At its widest point that includes the screw threads (150), the spike (104) measures approximately 0.17 inches in diameter. Excluding the screw threads (150), the spike (104) measures approximately 0.14 inches in diameter. The screw threads (150) are spaced approximately 0.1 inches apart. The spike (104) terminates in a pointed tip designed for easy ground penetration. The radiused edges and carefully selected angles contribute to both the functional performance and durability of the first marker disc (102) during repeated use on golf course putting surfaces.

[0073]FIG. 4 illustrates a magnified view of section B from the cross-sectional view of FIG. 3, specifically detailing the geometry of the spike (104). In this detailed view, the spike (104) exhibits a precisely engineered tapered profile. The tapered section of the spike (104) forms a point having an angle of 78 degrees and is approximately 0.18 inch in length.

[0074]The tapered profile incorporates carefully calculated angles and transitions that facilitate easy insertion into and removal from the putting green surface while providing secure anchoring during use. The geometry shown in this magnified view works in concert with the other dimensional aspects of the spike (104) detailed in FIG. 3 to create an effective ground-engaging feature that minimizes damage to the putting surface. Those of skill in the art will recognized, however, that other configurations may also be useful in other embodiments of the present invention.

[0075]FIG. 5 illustrates a top view of the first marker disc (102) useful in a golf ball marking system (100 of FIG. 1) according to embodiments of the present invention, particularly detailing the geometry of the head portion (118). The head portion (118) has an overall width dimension of 0.95 inches and an overall length dimension of 0.87 inches. The head portion (118) includes a centrally located cylindrical cavity with a diameter of 0.2 inches for housing a magnetic component as previously described.

[0076]A distinctive feature of the head portion (118) is the head notch (148), which is formed as a sector removed from the otherwise circular perimeter of the head portion (118). The head notch (148) is defined by two radii extending from the center of the head portion (118) and an arc between them, creating a precise geometric cutout that facilitates engagement with the marker receptacle of the second marker disc. The head notch (148) on each side of the head portion (118) of FIG. 5 is approximately 0.69 inches in width, while the remaining portion of the circumference of the head portion (118) is approximately 0.54 inches in width. All external corners of the head portion (118) incorporate a radius of 0.02 inches, providing smooth transitions between surfaces while maintaining structural integrity.

[0077]The geometry of the head notch (148) is precisely engineered to correspond with the opening profile of the marker channel in the marker receptacle, enabling the keyed engagement mechanism between the first and second marker discs. When viewed from above as shown in FIG. 5, the relationship between the circular profile of the head portion (118) and the head notch (148) geometry becomes apparent, illustrating how these features work together to create a secure but rotatable connection between the marker components.

[0078]The dimensions shown in FIG. 5 are critical to proper functionality of the golf ball marking system (100 of FIG. 1), as they ensure proper fit and engagement between components while maintaining appropriate proportions for practical use on the putting green.

[0079]FIG. 6 illustrates a left view of a first marker disc useful in a golf ball marking system (100 of FIG. 1) according to embodiments of the present invention, particularly with the first marker disc (102) installed in ground (106), such as a putting green surface. The first marker disc (102) is shown with its spike (104) penetrating the ground (106) to a depth that provides secure anchoring while maintaining proper positioning of the head portion above the ground surface. When properly installed, the spike (104) creates minimal disruption to the putting surface while providing sufficient stability to prevent unwanted movement of the first marker disc (102) during use.

[0080]The interaction between the spike (104) and ground (106) is particularly important for proper functionality of the golf ball marking system. The spike (104) penetrates the ground (106) along its vertical axis, allowing the head portion to remain parallel to the putting surface. This orientation ensures proper engagement with a second marker disc while minimizing potential damage to the green. The tapered profile of spike (104), detailed previously in FIGS. 3 and 4, facilitates easy insertion into and removal from ground (106) while providing secure anchoring during use.

[0081]The depth of penetration is controlled by the overall length of spike (104) and its relationship to the bottom surface of the head portion, ensuring consistent positioning when the first marker disc (102) is pressed into ground (106). This consistent positioning is crucial for maintaining proper ball position marking in accordance with the Rules of Golf.

[0082]FIG. 7 illustrates a left view of a second marker disc useful in a golf ball marking system according to embodiments of the present invention. The second marker disc (110) of FIG. 7 is dimensioned larger than the first marker disc (102 of FIG. 1). The second marker disc (110) has an overall diameter of 1.34 inches and includes a marker receptacle (112) centrally located within its body. As shown in cross-section B-B, the marker receptacle (112) is configured to receive the entire head portion (118 of FIG. 1) of the first marker disc (102 of FIG. 1) and permits rotation of the second marker disc (110) relative to the first marker disc (102 of FIG. 1) about a vertical axis (114 of FIG. 1) that passes through the center of the first marker disc.

[0083]The second marker disc (110) of FIG. 7 has an overall thickness of 0.26 inches with a stepped profile that includes the marker receptacle (112). The marker receptacle (112) of FIG. 7 is approximately 0.14 inches thick. The marker receptacle (112) extends inward from one face of the second marker disc (110) to a depth sufficient to fully accommodate the head portion (118 of FIG. 1) of the first marker disc (102 of FIG. 1). The width of the marker receptacle (112) shown in FIG. 7 is approximately 0.83 inches.

[0084]A notable feature of the second marker disc (110) is its textured outer circumference (136), shown in the figure as a series of parallel vertical grooves or ridges extending around the entire perimeter. This textured pattern provides enhanced grip and handling characteristics during use, particularly when rotating the second marker disc (110) relative to the first marker disc (102 of FIG. 1). The texturing may be machined, molded, or otherwise formed into the outer circumference during manufacturing.

[0085]FIG. 8 illustrates a cross-sectional view C-C of the second marker disc of FIG. 7 useful in a golf ball marking system according to embodiments of the present invention, particularly detailing the internal structure of the marker receptacle (112). The marker receptacle (112) of FIG. 8 is configured to receive the entire head portion (118 of FIG. 1) of the first marker disc (102 of FIG. 1) and includes a marker channel (120) that enables the second marker disc (110) to rotate around the first marker disc (102 of FIG. 1) while the first marker disc (102 of FIG. 1) remains captured within the marker channel (120). The marker channel (120) includes a precisely engineered opening (122) that allows the first marker disc (102) to enter only when the vertical axes of both marker discs align and the components are oriented in their engagement orientation (124 of FIG. 1).

[0086]The design of the marker receptacle (112) of FIG. 8 incorporates specific features that enable it to securely hold the head portion (118) of the first marker disc (102) once engaged. When the second marker disc (110) is positioned in the engagement orientation (124 of FIG. 1), the head portion (118 of FIG. 1) can be inserted through opening (122). Upon rotation of the second marker disc (110) away from the engagement orientation (124 of FIG. 1), the marker receptacle (112) securely retains the head portion (118 of FIG. 1) within its internal recess cavity.

[0087]A magnetic component (140) is incorporated into the second marker disc (110) to provide additional retention force for securing the first marker disc (102 of FIG. 1) within the marker receptacle (112). The magnetic component (140) is positioned within the body of the second marker disc (110) adjacent to the marker channel (120), where it can effectively interact with either a magnetic or magnetically attractive material in the first marker disc (102 of FIG. 1). This magnetic retention system works in concert with the mechanical retention features of the marker receptacle (112) to ensure secure engagement between the components during use.

[0088]FIG. 9 illustrates a magnified view of section D from the cross-sectional view of FIG. 8, particularly detailing the construction of the second marker disc (110) in the region containing both the magnetic component (140) and replaceable signage (152). The overall section shown has a height of 0.10 inches, as measured from the outer surface to the inner cavity surface.

[0089]The magnetic component (140) is housed within a precision-machined cavity with a depth of approximately 0.06 inches in the second marker disc (110). This cavity is configured to securely retain the magnetic component (140) through an interference fit, with the component being press-fit into position during assembly. In some embodiments, additional retention features such as adhesive bonding or mechanical retention elements may be employed to ensure the magnetic component (140) remains securely positioned to maintain proper magnetic coupling with the first marker disc (102 of FIG. 1) within the marker receptacle (112 of FIG. 8).

[0090]A notable feature illustrated in this section view is the replaceable signage (152) that incorporates the second marker alignment indicator. The signage (152) is designed to be removable and replaceable, allowing golfers to customize the appearance and alignment features of their ball marker system. The signage mounting area has a depth of 0.04 inches, which provides sufficient recess for secure mounting while maintaining a low profile. The replaceable nature of the signage (152) enables golfers to select from various alignment indicator styles or patterns that match their personal preferences or putting alignment techniques. This customization feature also allows golfers to replace worn signage or update their alignment indicators as their putting style evolves.

[0091]The replaceable signage (152) may be secured using various methods, such as magnetic attachment, mechanical fastening, precision-fit retention features, or utilization of a sticker with an adhesive backing. The specific mounting mechanism is engineered to prevent unwanted movement or displacement during normal use while still allowing for intentional replacement when desired.

[0092]The second marker disc (110) features a stepped outer diameter configuration, with the main body having a diameter of 1.22 inches transitioning to a reduced diameter of 1.18 inches.

[0093]FIG. 10 illustrates a magnified view of section E from the cross-sectional view of FIG. 8, particularly detailing the shelf structure within the marker receptacle (112). The shelf (126) extends along the disc bottom surface (128) of the second marker disc (110) and forms a critical component of the marker retention system. The shelf (126) has a width of 0.04 inches and creates a precisely dimensioned ledge that extends inward from the outer wall of the marker receptacle (112). The vertical spacing between the shelf (126) and the upper portion of the marker receptacle (112) is 0.10 inches.

[0094]The shelf (126) of FIG. 10 forms a channel bottom surface (130) of the marker receptacle (112), creating a marker channel (120) with specific dimensional constraints that enable precise interaction with the first marker disc (102 of FIG. 1). The marker channel (120) is engineered to guide the first marker disc (102 of FIG. 1) into the marker receptacle (112) during initial engagement. Once engaged, the shelf (126) provides a continuous support surface (130) that retains the first marker disc (102 of FIG. 1) within the marker receptacle (112) as the second marker disc (110 of FIG. 8) rotates relative to the first marker disc (102 of FIG. 1).

[0095]The geometry of the shelf (126) is particularly important for the proper functioning of the ball marker system (100) shown in FIG. 1. The 0.04-inch width provides sufficient support surface area to maintain stable retention of the first marker disc (102 of FIG. 1), while the 0.10-inch vertical clearance ensures smooth rotational movement without binding. These precise dimensions create a mechanical retention system that securely holds the components together while still allowing free rotation about the vertical axis.

[0096]FIG. 11 illustrates a bottom view of a second marker disc useful in a golf ball marking system according to embodiments of the present invention, revealing the detailed geometry of the marker receptacle (112) and the textured outer circumference (136). The marker receptacle (112) features a central circular opening (122C) with radius or approximately 0.45 inches respectively, creating circular profile that form part of the engagement geometry. The marker receptacle (112) of FIG. 11 also includes openings (122A,122B) that also form part of the engagement geometry.

[0097]The opening (122) of the marker receptacle (112) is precisely dimensioned for proper engagement with the first marker disc (102 of FIG. 1) when aligned in the engagement orientation. The asymmetric dimensioning of the opening (122) ensures that the first marker disc can only be inserted in the correct orientation and is then locked into place within the second marker disc (110) when the second marker disc (110) is rotated.

[0098]The textured outer circumference (136) is characterized by a series of uniformly spaced serrations or grip features around the perimeter. These serrations provide optimal grip characteristics while maintaining durability. The texture pattern extends continuously around the outer circumference of the second marker disc (110) facilitates secure handling and precise rotational control during use.

[0099]FIG. 12 illustrates a left view of a golf ball marking system (100) according to embodiments of the present invention as installed in use on a putting surface. The system (100) is shown with the first marker disc (102) anchored into the ground (106), such as a putting green surface, via spike (104). The second marker disc (110), which has a larger diameter than the first marker disc (102), is shown engaged with the first marker disc (102) through its marker receptacle (112).

[0100]The spike (104) penetrates the ground (106) vertically, establishing a stable anchor point for the first marker disc (102). This anchoring ensures that the original ball position remains accurately marked throughout use. The first marker disc (102) remains stationary once inserted into the ground (106), providing a fixed reference point around which the second marker disc (110) can rotate.

[0101]The second marker disc (110) of FIG. 12 is shown mounted on top of the first marker disc (102), with the marker receptacle (112) receiving and retaining the first marker disc (102). This configuration allows the second marker disc (110) to freely rotate around a vertical axis (114) that passes through the center of the first marker disc (102). The larger diameter of the second marker disc (110) provides enhanced visibility and easier handling during rotation.

[0102]In this installed configuration, the system (100) provides a stable platform for marking ball position while enabling rotational adjustment of the second marker disc (110) to assist with alignment visualization. The replaceable signage (152) is visible on the top surface of the second marker disc (110), providing alignment indicators that can be customized to the golfer's preferences. The ability to change the signage (152) allows golfers to modify their alignment indicators based on personal style or specific putting visualization techniques while maintaining the core functionality of the marking system. The relationship between all components allows for smooth rotation while maintaining precise position marking in accordance with the Rules of Golf.

[0103]FIG. 13 illustrates a left view of a golf ball marking system according to embodiments of the present invention, revealing internal details of the engagement between the first marker disc (102) and second marker disc (110). The second marker disc (110) has an overall width of approximately 1.34 inches and incorporates a marker receptacle (112) designed to receive and retain the first marker disc (102).

[0104]The marker receptacle (112) is configured with a depth (144) specifically engineered to be greater than the thickness (146) of the head portion (118) of the first marker disc (102). This dimensional relationship creates a clearance space that ensures smooth rotational movement while maintaining secure retention. The overall height of the second marker disc (110) and first marker disc (102) when engaged is approximately 0.77 inches excluding an additional height due to the replaceable signage (152) that displays the second marker alignment indicator.

[0105]The vertical axis (114) passing through the center of the first marker disc (102) serves as the rotational axis for the system. When assembled, the spike (104) of the first marker disc (102) extends downward along this vertical axis (114), providing stable anchoring to the ground while allowing the second marker disc (110) to freely rotate about this axis.

[0106]The illustration of FIG. 13 particularly shows how the depth (144) of the marker receptacle (112) accommodates the entire thickness (146) of the head portion (118) while maintaining proper spacing for rotation. This careful dimensioning ensures that when the first marker disc (102) is fully inserted into the marker receptacle (112), the second marker disc (110) can rotate smoothly while remaining securely engaged.

[0107]FIG. 14 illustrates a cross-sectional view F-F of a golf ball marking system shown in FIG. 13 according to embodiments of the present invention, revealing how the magnetic components interact within the assembly. The second marker disc (110) has an overall thickness of approximately 0.26 inches and incorporates a magnetic component (140) positioned within its body adjacent to the marker receptacle (112).

[0108]The first marker disc (102) includes a corresponding magnetic component (142) configured to magnetically couple with magnetic component (140) of the second marker disc (110). When the first marker disc (102) is inserted into the marker receptacle (112), these magnetic components (140, 142) align along the vertical axis (114) that passes through the center of the first marker disc (102). The magnetic attraction between components (140, 142) helps retain the first marker disc (102) within the marker receptacle (112) while still allowing the second marker disc (110) to rotate freely around the first marker disc (102).

[0109]The spike (104) extends downward from the first marker disc (102) along the vertical axis (114), providing secure anchoring to ground (106). The marker receptacle (112) is precisely engineered to allow the magnetic components (140, 142) to maintain optimal spacing for both secure retention and smooth rotation. This magnetic retention system ensures the components remain properly engaged during use while preserving the ability to separate the components when desired.

[0110]FIG. 15 illustrates a top view of a second marker disc useful in a golf ball marking system according to embodiments of the present invention, particularly showing the replaceable signage (152) that incorporates a second marker alignment indicator (116). In the illustrated embodiment, the second marker alignment indicator (116) is implemented as three parallel bars extending across the top surface of the second marker disc (110). The textured outer circumference (136) is visible around the perimeter of the second marker disc (110), providing enhanced grip for rotational adjustment.

[0122]The replaceable nature of signage (152) allows these different alignment indicator configurations to be interchanged based on golfer preference, putting style, or specific green reading techniques. The second marker alignment indicator (116), regardless of its specific implementation, is positioned to provide a clear visual reference for alignment when the second marker disc (110) is rotated to the desired orientation.

[0123]FIG. 16 illustrates a top view of a first marker disc useful in a golf ball marking system according to embodiments of the present invention, showing both the first marker alignment indicator (132) and its smooth outer circumference (134). In the illustrated embodiment, the first marker alignment indicator (132) is implemented as three parallel bars extending across the top surface of the first marker disc (102). The smooth outer circumference (134) provides a clean, continuous edge profile that facilitates smooth rotation within the marker receptacle of the second marker disc.

[0124]The first marker alignment indicator (132) may be implemented in various configurations in different embodiments similar to that as described with reference to FIG. 15 and the second marker alignment indicator.

[0125]FIG. 17 illustrates a side view of a golf ball marking system according to embodiments of the present invention utilized in conjunction with a putter handle grip. FIG. 17 illustrates the golf ball marking system (100) positioned above a putter handle grip (200), demonstrating an additional utility of the system's design. The spike (104) of the golf ball marking system (100) is specifically engineered with dual-purpose functionality through its precise diameter and screw thread configuration.

[0126]The screw-like design of spike (104) serves multiple purposes. When used for its primary function, the helical threading provides secure anchoring of the golf ball marking system (100) into the ground during ball marking. The threading pattern, previously detailed with reference to FIG. 3, enables easy insertion and removal while ensuring stable positioning on the putting surface.

[0127]Additionally, the diameter and threading of spike (104) are specifically dimensioned to be compatible with standard apertures commonly found in commercially available putter handle grips such as the putter handle grip (200) of FIG. 17. This design feature enables the golf ball marking system (100) to be securely stored within the top opening of putter handle grip (200) when not in use. The screw-like configuration of spike (104) engages with the interior surface of putter handle grip (200), providing sufficient retention force to prevent accidental dislodgment during normal handling and movement of the putter.

[0128]This storage capability addresses a common challenge in golf by providing a convenient and secure method for maintaining immediate access to the ball marker while minimizing the risk of loss or misplacement during play. The secure engagement between spike (104) and putter handle grip (200) remains effective regardless of the putter's orientation during carrying or storage.

[0129]While the description above refers to particular embodiments of the present invention, it will be understood that many modifications may be made without departing from the spirit thereof. The accompanying claims are intended to cover such modifications as would fall within the true scope and spirit of the present invention. The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.