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Publication numberUS20030220150 A1
Publication typeApplication
Application numberUS 10/434,798
Publication dateNov 27, 2003
Filing dateMay 8, 2003
Priority dateMay 24, 2002
Publication number10434798, 434798, US 2003/0220150 A1, US 2003/220150 A1, US 20030220150 A1, US 20030220150A1, US 2003220150 A1, US 2003220150A1, US-A1-20030220150, US-A1-2003220150, US2003/0220150A1, US2003/220150A1, US20030220150 A1, US20030220150A1, US2003220150 A1, US2003220150A1
InventorsShinichi Takase
Original AssigneeShinichi Takase
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Putter head
US 20030220150 A1
Abstract
A putter head comprising a sole portion 3 extending from a lower portion of a face portion 2 in the opposite direction of a target, a back portion 4 extending upwardly from the edge portion of said sole portion 3, and a weight portion 5 attached to the upper edge portion of the back portion 4, wherein the weight portion 5 is positioned in a height at least the same height of the face portion 2, apart from the face portion in opposite direction of the target so as to set the depth of gravitational center deeper, and thereby widening the sweet spot area in the center on the surface of the face portion 2.
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Claims(3)
What we claimed is:
1. A putter head comprising:
a face portion for hitting a golf ball toward the target;
a sole portion extending from a lower edge portion of said face portion along the ground in opposite direction of said golf ball hit;
a back portion extending upwardly from an end portion of said sole portion; and
thereby forming a substantially U-shaped putter head integrally;
wherein a weight portion attached to an upper portion of said back portion in a height at least the same height of said face portion, thereby setting a center of gravity of said back portion in higher position.
2. The putter head according to claim 1, wherein said back portion divides load of said weight portion to a toe portion and a heel portion of said sole portion by arranging a hole thereon in which being visible to a rear surface of said face portion, and thereby distributing a ratio of said load optionally between said toe portion and said heel portion of said sole portion in accordance with the position where said hole is arranged thereon.
3. The putter head according to claim 1, wherein an index line arranged on an upper surface of said sole portion, and a basis portion arranged on said weight portion being fixed in a parallel and a higher position upper from said index line.
Description
BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a golf putter head (hereinafter a putter head).

[0003] 2. Description of the Related Art

[0004] Conventional putter heads for the purpose of hitting a golf ball at a sweet spot of a putter have been examined in various improvements, e.g., a balancer being provided on a putter head as disclosed in Japanese Patent Application Laid-Opens (Kokai) No. 1998-137374, No. 2001-25518, and No. 2001-137400.

[0005] Another improvement example is that a straight index line is attached to a putter head in the swing direction to increase hole-out probability as disclosed in Japanese Patent Application Laid-Open (Kokai) No. 1998-192466. Further, Japanese Patent Application Laid-Open (Kokai) No. 1998-248975 shows that an index line is attached to a club head along a direction from a toe portion of the club head to a heel portion of the club head, or Japanese Patent Application Laid-Open (Kokai) No. 1999-19264 shows that an attachable guide metal fitting is fixed to a lower portion of a shaft, above an index line in a swing direction.

[0006] Conventional putter heads have difficulties in manufacturing or appearance. For example, Japanese Patent Application Laid-Open (Kokai) No. 2002-65913 discloses a putter head with respects to adopting partially different material into a head to provide a weight portion having a larger specific gravity. Or, Japanese Patent Application Laid-Open (Kokai) No. 1998-137374 discloses a putter head being twisted a weight member into an appropriate position of a putter head. In addition, they have further difficulties in optimizing a head weight, a center position of gravity, a distance and depth of gravitational center, or in load-balancing between a toe portion of the putter head and a heel portion thereof.

[0007] It is also practically impossible to hit a golf ball accurately in a desired direction toward the target with those putters of aforementioned references. In addition, it is not popular to use the putter as shown in Japanese Patent Application Laid-Open (Kokai) No. 1999-19264 in the market, because not only that an attachment of a metal fitting is limited for a putting practice but also that golfers suspect the effect of the attachment thereof.

[0008] In order to solve above problems, accordingly, the present inventor has discussed a putter head with easy manufacturing and a preferable appearance; having features to set a depth of gravitational center deeper toward a golf ball during putting; to divide load balance between a toe portion of the putter head and a heel portion of the putter head; and also to perfectly capture the index line attached to the putter head so as to secure an accurate swing for putting a golf ball toward the target.

SUMMARY OF THE INVENTION

[0009] As a result of the above-described discussion, the present inventor has developed a golf putter head comprising: a face portion for hitting a golf ball toward the target, a sole portion extending from a lower edge portion of the face portion in the opposite direction of the target along the ground, and a back portion extending upwardly from an end portion of the sole portion, thereby integrally forming a putter head having a substantially U-shaped in side view; wherein a weight portion is attached to an upper portion of the back portion in a height at least the same height of the face portion so that the center of gravity of the back portion is set in a higher position apart from the face portion. By setting the center of gravity of the back portion with the weight portion thereon in a rearward position with at least the same height of, more preferably, the higher than the upper edge of the face portion, a depth of gravitational center of the putter head can be set deeper against the face portion, resulting in widen the sweet-spot area (i.e., a best area for hitting a golf ball) on the face portion. The weight portion may be varied in materials, shapes or specific gravity corresponding to hitting performance and appearance required.

[0010] The back portion may have a structure that a hole is arranged to the back portion in which being visible to a rear surface of the face portion, and thereby load of the weight portion is divided respectively to the toe and the heel portions through each wall face applied by the hole arranged. This structure also allows the back portion to distribute a ratio of loads which is applied optionally between the toe and heel portions of the sole portion in accordance with the position where the hole is arranged on the back portion, so as to regulate the load balance into the face portion.

[0011] Next, a visible index line is arranged on the upper surface of the sole portion, and a basis portion is provided in a parallel and higher position with a prescribed interval to the index line. The basis portion may be obtained by utilizing the edge of the weight portion, or also by providing an eye-hole arranged on a surface of the weight portion. The eye-hole preferably has an outer shape similar to an outer shape of the index line, e.g., the eye-hole opening at a longitudinal shape or a cross-shape. As for a configuration of the eye-hole serving as the basis portion, a width of the eye-hole is not necessary to be the same of the width of the index line as long as at least one of the side edges of the eye-hole in the longitudinal direction has fitted with that of the index line.

[0012] The basis portion may be employed by a discontinuous configuration such as a broken line if the whole outer shape of the index line precisely could be in a sight of the basis portion. Further, the basis portion can be arranged to a top plate of an attachment member having a box-shape or a bridge-shape, so that the basis portion can be employed to several types of the putter which has a space being mountable at a rear area of the face portion.

[0013] The position of the basis portion may preferably be set in a height between 15 mm to 40 mm, preferably 25 mm to 30 mm (i.e., closer to a player's sight) above from the index line. In a case of attaching the basis portion to a top plate of the attachment member, a thickness T of the top plate may be within the range of 5 mm to 10 mm, preferably 7 mm to 8 mm. In a case of that the basic portion as being of the eye-hole, a width W of the hole may be within the range of 5 mm to 8 mm, preferably 6 mm to 7 mm. It is preferable that the index line having about 3 mm width and about 30 mm length thereof, and the basis portion having a length L between 40 mm to 75 mm.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014]FIG. 1 is a front view of the putter head of the invention.

[0015]FIG. 2 is a right side view of the putter head of the invention.

[0016]FIG. 3 is a plan view of the putter head of the invention.

[0017]FIG. 4 is a rear view of the putter head of the invention.

[0018]FIG. 5 is a side view of the putter head of the invention showing a process in use.

[0019]FIG. 6 is a left side view of the putter head in alternate embodiment of the invention.

[0020]FIG. 7 is a plan view of the putter head in alternate embodiment of the invention.

[0021]FIG. 8 is a front view of the putter head in another example of the invention.

[0022]FIG. 9 is a left side view of the putter head in another example of the invention.

[0023]FIG. 10 is a plan view of the putter head in another example of the invention.

[0024]FIG. 11 is a rear view of the putter head in another example of the invention.

[0025]FIG. 12 is a plan view of the putter head of the present invention in condition that a face of the putter opened against a target direction.

[0026]FIG. 13 is a plan view of the putter head of the present invention in condition that a face of the putter closed against a target direction.

DETAILED DESCRIPTION OF THE INVENTION

[0027] A putter head illustrated in the drawings is attached to a shaft 1, having a face portion 2, as conventional, at a front surface of the putter head. The present invention adopts a characteristic portion at a rear portion of said face portion 2, which has a sole portion 3 extending from a lower portion of said face portion 2 in the opposite direction of an impact target. A back portion 4 extends upwardly from an edge portion of said sole portion 3, wherein a weight portion 5 is attached to an upper portion of said back portion 4. Accordingly, the weight portion 5 is disposed in a rearward position with at least the same height to the upper edge of the face portion 2, so as to concentrate weight in rearward from the face portion 2. That is, loads can be transmitted to the face portion 2 through the back portion 4 and the sole portion 3, thereby setting a depth of gravitational center of the putter deeper. Therefore, a sweet spot area P (illustrated by the central point of the sweet spot area in the drawings) is widened in the center portion on the surface of the face portion 2.

[0028] A hole 6 is arranged to the back portion 4 extending upwardly from the end portion of the sole portion 3. Depending on the shape or position of the hole 6 arranged on the back portion 4, the ratio of loads divided to a toe portion 7 of the putter head and a heel portion 8 of the putter head through wall faces formed by the back portion split can be set optionally. Accordingly, a load balance of the face portion 2 can be regulated.

[0029]FIG. 5 illustrates a process of the putter head of the invention in use. As shown in FIG. 5, the concentrated weight at a rearward position with at least the same height from the upper edge of the face portion 2 can make a golf ball 9 to be hit at the sweet spot P disposed in the higher position of the center portion by widening thereof on the surface of the face portion 2. This causes that it gives energy to a golf ball hit longer by such a widened sweet spot, and thereby generating a forward rotary motion onto the ball. Accordingly, a favorable putting having a well-rolled ball with kept in straight line can be achieved.

[0030] The putter head shown in FIG. 6 and FIG. 7 also concentrates the weight disposed in a rearward position with at least the same height from the upper edge of the face portion 2. However, this embodiment of the putter head comprises a narrower width of a sole portion 3 than comparative aforementioned embodiments, and, a back portion 4 extending from the narrow sole portion 3 by the angle that declined to being opening upwardly. In this embodiment, a golf ball is also hit at a sweet spot P in a higher position of the center portion of the face portion 2. Accordingly, it gives energy to a golf ball hit longer by such a widened sweet spot, and thereby generating a forward rotary motion onto the ball.

[0031] A putter head, as illustrated in FIGS. 8-11, includes a shaft 1 extended from the face portion 2 and a back portion 4 provided upwardly from the sole portion 3 extended from the lower portion of the face portion 2 in the opposite direction of an impact target, wherein the back portion 4 protrudes from the sole portion 3 in at least the same height of the upper edge of the face portion 2. In addition, the weight portion 5, having a similar configuration to that of the back portion 4, is attached to the back portion 4 with contacting the surfaces each other. Therefore, the center of gravity of the weight portion 5 is set in the rearward position with at least the same height from the upper edge of the face portion 2, as well as aforementioned embodiments. Thus, the deeper central of gravity makes the sweet spot P area in the center portion of the face portion 2 wider.

[0032] In this example, an upper edge of the weight portion 5 functioning as the basis portion is provided with the position above from the index line 10 provided on the upper surface of the sole portion 3. The eye-hole as being of the basis portion may be provided with the weight portion. The index line 10 in this embodiment has a thickness of 3 mm and a length of 40 mm. The height of the upper edge of the weight portion 5 functioning as the basis portion 11 is set in 30 mm height above said index line 10. A hole 6 formed by wall faces of the back portion 4 and the weight portion 5 is also functioning as an aperture for admitting light to the index line 10 in higher visuality.

[0033] Next, the action of the basis portion 11 is described as follows. The index line 10 can be seen in parallel to the edge line of the basis portion 11 when the face portion 2 is precisely aimed at the target, as shown in FIG. 9 and FIG. 10. However, the index line 10 can be seen in declined to the edge line of the basis portion 11, as shown in the FIG. 12, when the face portion 2 opens its angle to the target over 90 degrees. Contrarily, as shown in FIG. 13, the index line 10 can be seen in inclined to the edge line of the basis portion 11 when the face portion 2 closes its angle to the target less than 90 degrees.

[0034] As described above, therefore, the relationship between the index line 10 and the basis portion 11 appears to be in non-parallel unless the face portion 2 is precisely aimed at the target. This is caused by that the face of the putter head has a loft angle of about three degrees. When the face angle of the putter against the target opens, a golf player takes the loft angle of the putter head for different angles between at the toe portion and at the heel portion. This causes that the index line 10 can be seen in declined to the edge line of the basis portion 11. Contrarily, when the face angle of the putter against the target closes, a golf player takes the loft angle of the putter head for different angles between at the toe portion and at the heel portion, and thereby the index line 10 can be seen in inclined to the edge line of the bases portion 11.

[0035] Therefore, correction of the facing direction of the putter to keep a relationship between the index line 10 and the basis portion 11 in parallel realizes that the face portion 2 is precisely aimed at the target. The golf ball can be hit to the target precisely by a correct swing of the putter.

[0036] In addition, the putter head of the present invention has achieved that a golf ball with a forward rotary motion is obtained by applying impact energy longer to the ball with a wider sweet spot area of the present putter. Accordingly, a favorable putting having a well-rolled ball with kept in straight line can be achieved. The present putter further sets the depth of gravitational center deeper and the height of gravitational center higher, and divides load balance between the toe and the heel portions, so as to obtain a wider sweet spot at the face portion, whereby a putting convenience and the hole-out probability are both improved.

[0037] In addition, the basis portion of the present invention can be provided not only utilizing by the edge portion of the weight portion, but also structuring as an attachment member. Alternatively, an attachment member as being of a different member may be adopted for the basis portion so as to provide a structure having versatility in easy attachment to an existing golf club such as a putter.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7223178 *Apr 7, 2005May 29, 2007Mph Golf, LlcGolf ball putter including golf ball alignment indicia
US7473188 *Feb 9, 2007Jan 6, 2009Sri Sports LimitedPutter head
US7993215Mar 22, 2007Aug 9, 2011Gregory E. SummersProducing golf clubs
Classifications
U.S. Classification473/251, 473/340, 473/341
International ClassificationA63B53/04
Cooperative ClassificationA63B53/0487, A63B2053/0441, A63B2053/0433
European ClassificationA63B53/04P
Legal Events
DateCodeEventDescription
May 17, 2006ASAssignment
Owner name: S.A.R.L. AGRO SELECTION FRUITS, FRANCE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MAILLARD, LAURENCE;MAILLARD, ARSENE;REEL/FRAME:017905/0935
Effective date: 20060418