Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3863932 A
Publication typeGrant
Publication dateFeb 4, 1975
Filing dateMay 21, 1973
Priority dateMay 21, 1973
Also published asCA982172A1
Publication numberUS 3863932 A, US 3863932A, US-A-3863932, US3863932 A, US3863932A
InventorsLezatte Arthur J
Original AssigneeWilson Sporting Goods
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Weighted wood golf club
US 3863932 A
Abstract
An improved wood-type golf club having a club head in which a recess is formed, the recess being filled with an insert, a dense weighting means within the insert, and a layer of an impact resistant resin within the insert holding the weighting means therein, the weighting means being positioned to provide a center of gravity for the club head which is closer to the leading edge of the club face than in the absence of the weighting means.
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

United States Patent 11 1 1111 3,863,932

Lezatte 1 Feb. 4, 1975 1 WEIGHTED WOOD GOLF CLUB 3,172,667 3/1965 Baker 273/173 3,305,235 2/1967 Williams 273/169 X [75] Inventor- 3 Lem, DOWN" Grove 3,652,094 3/1972 016w 273/173 x FOREIGN PATENTS OR APPLICATIONS [73] Ass'gnee' g f Rver 963,652- 7/1964 Great Britain 273/173 [22] Filed: May 21, 1973 Primary Examiner-Richard J. Apley Attorney, Agent, or Firm-Hill, Gross, Simpson, Van [21] Appl' L004 Santen, Steadman, Chiara & Simpson [52] U.S. Cl. 273/169, 273/167 F, 273/173 [57] ABSTRACT [51] Int. Cl A63b 53/04 An im proved wood-type golf club havmg a club head Fleld of Search R, in a recess is e the recess i g with an insert, a dense weighting means within the in- [56] References C'ted sert, and a layer of an impact resistant resin within the UNITED STATES PATENTS insert holding the weighting means therein, the 1,467,435 9/1923 Kinnear 273/173 X weighting means being positioned to provide a center 1,525,352 2/1925 Aitken of gravity for the club head which is closer to the lead- 1,543,691 6/1925 Beat.....

ing edge of the club face than in the absence of the 1,562,956 11/1925 Guerne....

, weighting means. 1,659,272 2/1928 Lmk I 1,840,451 1/1932 .lansky 273/173 7 Claims, 5 Drawlng Figures /5 T X 4 i i In Ta T T 1 3 A5 A5 Z I WEIGHTED WOOD GOLF CLUB BACKGROUND OF THE INVENTION l. Field of the Invention This invention is in the field of wood-type golf clubs having weighting means which move the center of gravity for the club head forward and preferably into the plane which bisects the shaft of the club.

2. Description of the Prior Art The problem of proper transfer of momentum from a golf club to the impact of a golf ball is one which has occupied the attention of golf club manufacturers for many years. The magnitude of the problem can be appreciated when it is realized that a golf club head may be moving at a speed in excess of 160 feet per second when it strikes a ball. The time of impact between the golf club and the ball has been estimated to be less than one millisecond so that there is a tremendous amount of energy absorption in a very brief period of time. In order for this transfer of energy to result in an adequate movement of the ball in terms of distance and direction, the effective mass of the club head should be properly positioned with respect to the area of impact on the ball.

Various weighting means have been suggested in the prior art for reallocating the mass of the club head, such weighting means usually taking the form of a heavy metal slug which is located beneath the sole plate in various positions. It has been found, however, that the positioning of weights in this manner does not always result in improving the energy transfer between a golf wood head and the golf ball. Possibly, this is due to the fact that the line of action ofthe centers of gravity of the ball and the club head are not in line with the theoretical flight path so that an inefficient collision results between the head and the ball.

SUMMARY OF THE INVENTION The present invention provides an improved woodtype golf club in which the club head is provided with a conventional recess in which an insert is tightly received. The configuration of the insert, however, differs from conventional inserts in that it has a .bore therein at the inner extremity of which there is a shallow recess. A weighting disc composed of a dense metal such as a tungsten alloy or the like overlies and closes off this shallow recess. A layer of adhesive is provided in the shallow recess to secure the disc thereagainst. The bore in the insert has a flared portion of increased diameter spaced from the striking face, and a layer of impact resistant resin fills this bore about the disc and provides the striking face at the forward edge of the insert. The golf club may also be provided with an annular groove in the insert between the shallow recess and the striking face for receiving an additional amount of resin to securely lock the impact resistant resin within the insert.

The procedural steps involved in making the improved golf club of the present invention consist of positioning the weighting disc about the shallow recess of the insert and adhesively securing the two together. This is followed by pouring in an impact resistant resin into the cavity provided in the recess so that the resin sets and solidifies about the weighting disc confined therein. The resin expands slightly on setting, so that it completely fills the recess in the insert and is locked in place. This final step consists in grinding or otherwise shaping the striking face of the insert to conform it to the desired radius of the golf club head.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects, features and advantages of the inven tion will be readily apparent from the following description of certain preferred embodiments thereof, taken in conjunction with the accompanying drawings, although variations and modifications may be effected without departing from the spirit and scope ofthe novel concepts of the disclosure. and in which:

FIG. 1 is a fragmentary side elevational view of the improved golf club of the present invention;

FIG. 2 is a fragmentary front elevational view of the golf club of the present invention;

FIG. 3 is a fragmentary plan view of the golf club head of the present invention;

FIG. 4 is an exploded view on an enlarged scale of the insert of the present invention, with the parts being tilted somewhat for showing the configuration more specifically; and

FIG. 5 is a fragmentary cross-sectional view on an enlarged scale of the insert of the present invention in the form in which it is received within the golf club head.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 indicates generally a golf club of the wood type, the specific club being illustrated being a No. 1 wood although it will be evident that the invention is also applicable to other wood clubs having different angles of inclination on the striking faces. The golf club 10 may be composed of a laminated construction as is common in the prior art and it includes a head I] having a striking face 12 of relatively large radius of curvature, usually on the order of lOl z inches. Disposed within a suitable wedge-shaped recess in the striking face 12 is a wedge-shaped insert 13 which extends from the sole ofthe club to the upper portion of the striking face in the conventional manner. A set of grooves 14 is provided across the insert 13 as well as across the adjoining portions of the striking face 12 on either side of the insert 13. The club head 11 also includes a neck portion 15 which is received within a neck collar 16 which also receives, at its opposite end, a shaft 17.

The construction of the insert 13, per se, is best illustrated in FIGS. 4 and 5 of the drawings. As there illustrated, the insert 13 has a relatively deep bore 18 which proceeds inwardly into the insert 13 from the striking face thereof. An annular groove 19 is formed in a medial portion of the bore 18 to serve as an additional locking means for the impact resistant resin which is poured into the bore, as will be apparent from a succeeding portion of this description. lnwardly of the annular groove 19, the bore 18 is outwardly flared as indicated at reference numeral 20 by a few degrees or so to serve as an additional means for locking the impact resistant resin within the bore to resist disengagement of the resin from within the bore.

The innermost end of the bore is formed with a relatively shallow recess 21 and the bore also has an annular flange surface 22. A decorative washer 23 composed of brass or the like is positioned along the annular flange 22 in surrounding relationship to a disc 24 composed of a dense metal such as a sintered, highly placed therearound, the remaining void space is filled by means of an impact resistant resin layer 26. For purposes of eye appeal, the impact resistant resin may be transparent material such as an epoxy resin or other suitable high impact material such as a polycarbonate, a polyester, or a polyimide resin.

ln setting, an impact resistant epoxy resin undergoes a slight expansion so that the resin may extend beyond the confines of the striking face of the insert. Any such excess can be removed by grinding, machining, or other means to provide a striking face 27 having a relatively large radius of curvature such as /2 inches or so. At that time, the grooves 14 can be scribed in the striking face of the resin 26 as well as in the adjoining portions of the club head.

The disc 24 is located immediately behind the proper point of impact on the striking face 27. Referring to FIG. 3, if the insert 13 is made ofa completely homogeneous material, that is, without the combination of the insert and the impact resistant resin, the center of gravity of the club head will be located at a distance A from the tangent to the leading edge of the club face, as illustrated in that figure. With the improvements of the present invention, however, the center of gravity of the club head lies at a distance B from the leading edge of the club face and is substantially in the plane which bisects the shaft 17.

The positioning of the disc 24 also serves to change the moment of inertia of the club head about its principal axes. These axes are identified in FIGS. 1 and 3 as the .r, y and z axes. The ideal weight distribution would be such as to increase the moment of inertia about the center of gravity in the .tz plane, i.e., in a plane parallel-t0 the ground and passing through the vertical level of the center of gravity of the club head. With such a weight distribution, the club head would be the most stable during a swing and there would be less tendency to hit off-line shots. The location of the disc 24 in the insert as indicated serves to increase the moment of inertia in this x-z plane, thereby making the club head more stable than a conventional head.

To illustrate the effect of positioning the weighting disc in the center of the face insert, some measurements were made with a No. 1 wood of conventional design. It was found that the center of gravity of the wood club with a conventional insert existed at a point which was 1 -3/l6 inches from the leading edge of the sole, /8 of an inch vertically from the leading edge, and 9/32 of an inch behind the axis of the shaft. When the same club was provided with an insert including a tungsten alloy weighting disc of an inch in outer diameter and /8 inch thick, weighing approximately 9/16 of an ounce, the center of gravity of the club head was found to exist at a point which was /8 of an inch from the leading edge of the sole, 13/16 of an inch vertically from the leading edge, and only 1/32 of an inch behind the axis of the shaft.

The movement of the center of gravity of the head has been found to improve significantly the energy transfer between the head of the club and the golf ball when properly struck. The line of action of the centers of gravity of the ball and the club head are more directly in line with the theoretical flight path resulting in a more efficient collision between the club head and the ball. Another advantage is achieved in the combined coefficient of restitution between the ball and the insert. The use of the dense weighting disc in the hitting area increases the amount of energy available in a measurable quantity.

By positioning the weighting disc with its centerline coinciding with the center of the proper hitting area on the striking face, more mass is concentrated in precisely the region in which it does the most good. There is a corresponding lesser tendency to have a component of the impact force at an angle other than normal to the vertical tangent plane of the ball, so that the tendency to hit shots off line is somewhat reduced.

It should be evident that various modifications can be made to the described embodiments without departing from the scope of the present invention.

I claim as my invention:

1. A wood-type golf club comprising a club head having a recess in the striking area, an insert filling said recess, a dense disk weighting means within said insert, a layer of an impact resistant resin within said insert covering one face and at least a portion of the periphery of said disk, the layer of resin having a smoothly contoured, uninterrupted surface forming part of the striking face of said club, the disk weighting means being positioned to provide a center of gravity for said club head which is closer to the leading edge of the club face than in the absence of said weighting means.

2. The golf club of claim 1 in which said weighting means is positioned so that center of gravity is substantially in the plane which bisects the shaft of the club.

3. The golf club of claim 1 which includes an annular recess in said insert forwardly of said weighting means for anchoring said layer of resin within said annular recess.

4. The golf club of claim 1 in which said insert includes an angular taper in said recess for locking said layer of resin therein, said recess having a larger diameter at its base than at its striking face.

5. The golf club of claim 1 in which said resin is an epoxy resin.

6. A wood-type golf club comprising a club head having a wedge'shaped recess therein in the striking area, a wedge-shaed insert received within said recess, said insert having a bore with a relatively shallow recess at its innermost extremity, a weighting disc overlying and closing off said shallow recess, a layer of adhesive in said shallow recess securing said disc thereagainst, said bore in said insert having a flared portion of increased diameter spaced from said striking face, and a layer of impact resistant resin filling said bore about said disc and having a large diameter radius surface forming the striking area of said club.

7. The golf club of claim 6 which includes an annular groove in said insert between said shallow recess and said striking face for receiving said resin in locking engageme nt.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1467435 *Jan 31, 1921Sep 11, 1923William KinnearGolf club
US1525352 *Feb 27, 1924Feb 3, 1925Garfield Aitken James AbramGolf-club
US1543691 *Jun 10, 1922Jun 30, 1925Beat William NGolf club
US1562956 *Mar 23, 1925Nov 24, 1925Guerne Alfred AGolf-club head
US1659272 *Oct 22, 1927Feb 14, 1928Link Albert CGolf club
US1840451 *Dec 28, 1929Jan 12, 1932Wilson Western Sporting GoodsGolf club
US3172667 *Apr 2, 1962Mar 9, 1965Wilson Athletic Goods Mfg Co IGolf club head having a plastic striking face insert bonded to the club head material and method for making same
US3305235 *Jul 28, 1965Feb 21, 1967Williams Jr Albert JLongitudinally adjustable golf club including head with high moment of inertia abouttwo axes
US3652094 *Oct 21, 1969Mar 28, 1972Cecil C GloverGolf club with adjustable weighting plugs
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3989248 *Feb 20, 1976Nov 2, 1976Pepsico, Inc.Golf club having insert capable of elastic flexing
US4213613 *Dec 29, 1977Jul 22, 1980Nygren Gordon WGolf club head with center of gravity near its striking face
US4498672 *Oct 17, 1983Feb 12, 1985Bulla John GGolf club head with flexure frequency matched with distortion-relaxation frequency of ball
US4674746 *Mar 27, 1984Jun 23, 1987Benoit William RGolf club
US5076585 *May 20, 1991Dec 31, 1991Harry BouquetWood golf clubhead assembly with peripheral weight distribution and matched center of gravity location
US5195747 *May 26, 1992Mar 23, 1993Choy Jung SooGolf club
US5228615 *Feb 20, 1991Jul 20, 1993Yamaha CorporationMethod of manufacturing golf head
US5405137 *Jan 25, 1994Apr 11, 1995Taylor Made Golf Company, Inc.Golf club head and insert
US5409229 *Sep 13, 1993Apr 25, 1995Callaway Golf CompanyGolf club head with audible vibration attenuation
US5464218 *Jul 7, 1994Nov 7, 1995Callaway Golf CompanyGolf putter head with undercut back cavity and peripheral weighting
US5580322 *Jun 15, 1995Dec 3, 1996Bouquet; HarryWood golf clubhead assembly with peripheral weight on clubface
US5605511 *Dec 6, 1994Feb 25, 1997Callaway Golf CompanyGolf club head with audible vibration attenuation
US5704849 *Apr 25, 1995Jan 6, 1998Callaway Golf CompanyGolf club head with audible vibration attenuation
US5776010 *Jan 22, 1997Jul 7, 1998Callaway Golf CompanyWeight structure on a golf club head
US5816936 *Jan 23, 1995Oct 6, 1998Daiwa Seiko, Inc.Golf club head and method of manufacturing the same
US5879243 *Aug 1, 1997Mar 9, 1999Hackman; Lloyd E.Weight forward golf club head
US5944619 *Sep 6, 1996Aug 31, 1999Acushnet CompanyGolf club with an insert on the striking surface
US5972144 *Mar 11, 1998Oct 26, 1999Hsu; Tsai-FuMethod for manufacturing golf club putter heads
US6231458Dec 23, 1998May 15, 2001Acushnet CompanyGolf club head with an insert on the striking surface
US6334818Jan 22, 1999Jan 1, 2002Acushnet CompanyGolf club head with an insert on the striking surface
US6508722Jan 31, 2000Jan 21, 2003Acushnet CompanyGolf club head and improved casting method therefor
US6592469Jan 25, 2001Jul 15, 2003Acushnet CompanyGolf club heads with back cavity inserts and weighting
US6595057Apr 10, 2002Jul 22, 2003Acushnet CompanyGolf club head with a high coefficient of restitution
US6605007Apr 18, 2000Aug 12, 2003Acushnet CompanyGolf club head with a high coefficient of restitution
US6945877 *Feb 20, 2004Sep 20, 2005K.K.Endo SeisakushoGolf club
US6951518 *Jan 23, 2004Oct 4, 2005Karsten Manufacturing CorporationGolf club head having a bi-polymer face insert and method of making same
US6960142Apr 30, 2003Nov 1, 2005Acushnet CompanyGolf club head with a high coefficient of restitution
US7029403May 1, 2003Apr 18, 2006Acushnet CompanyMetal wood club with improved hitting face
US7041003May 1, 2003May 9, 2006Acushnet CompanyGolf club head with variable flexural stiffness for controlled ball flight and trajectory
US7140975Dec 13, 2004Nov 28, 2006Acushnet CompanyGold club head with variable flexural stiffness for controlled ball flight and trajectory
US7169059Apr 22, 2005Jan 30, 2007Acushnet CompanyMetal wood club with improved hitting face
US7207898Aug 4, 2004Apr 24, 2007Acushnet CompanyMetal wood club with improved hitting face
US7214142Mar 12, 2004May 8, 2007Acushnet CompanyComposite metal wood club
US7261643Aug 4, 2004Aug 28, 2007Acushnet CompanyMetal wood club with improved hitting face
US7297072Aug 25, 2006Nov 20, 2007Acushnet CompanyComposite metal wood club
US7361099Mar 16, 2007Apr 22, 2008Acushnet CompanyMetal wood club with improved hitting face
US7367899Apr 13, 2005May 6, 2008Acushnet CompanyMetal wood club with improved hitting face
US7407448Oct 5, 2007Aug 5, 2008Callaway Golf CompanyGolf club head
US7413517 *Jan 25, 2005Aug 19, 2008Butler Jr Joseph HReconfigurable golf club and method
US7419440May 14, 2007Sep 2, 2008Callaway Golf CompanyGolf club head
US7422527Jul 20, 2007Sep 9, 2008Acushnet CompanyMetal wood club with improved hitting face
US7431664Nov 13, 2007Oct 7, 2008Acushnet CompanyComposite metal wood club
US7455598Oct 8, 2007Nov 25, 2008Callaway Golf CompanyGolf club head
US7476161Oct 8, 2007Jan 13, 2009Callaway Golf CompanyGolf club head
US7488261Oct 4, 2007Feb 10, 2009Callaway Golf CompanyGolf club with high moment of inertia
US7494424Oct 8, 2007Feb 24, 2009Callaway Golf CompanyGolf club head
US7520819Mar 31, 2008Apr 21, 2009Acushnet CompanyMetal wood club with improved hitting face
US7537528Aug 4, 2008May 26, 2009Acushnet CompanyMetal wood club with improved hitting face
US7549934Aug 4, 2006Jun 23, 2009Acushnet CompanyMetal wood club with improved hitting face
US7553242Oct 1, 2008Jun 30, 2009Acushnet CompanyComposite metal wood club
US7559851Jul 20, 2006Jul 14, 2009Callaway Golf CompanyGolf club with high moment of inertia
US7578751Nov 24, 2008Aug 25, 2009Callaway Golf CompanyGolf club head
US7588501Feb 23, 2009Sep 15, 2009Callaway Golf CompanyGolf club head
US7591737Oct 8, 2007Sep 22, 2009Callaway Golf CompanyGolf club head
US7674187Jul 13, 2009Mar 9, 2010Callaway Golf CompanyGolf club with high moment of inertia
US7682262Mar 8, 2006Mar 23, 2010Acushnet CompanyMetal wood club with improved hitting face
US7704162Sep 7, 2005Apr 27, 2010Acushnet CompanyMetal wood club with improved hitting face
US7749096Sep 22, 2009Jul 6, 2010Callaway Golf CompanyGolf club head
US7762907Jun 19, 2009Jul 27, 2010Acushnet CompanyMetal wood club with improved hitting face
US7850541May 20, 2009Dec 14, 2010Acushnet CompanyComposite metal wood club
US7850543Mar 16, 2009Dec 14, 2010Acushnet CompanyMetal wood club with improved hitting face
US7850544May 20, 2009Dec 14, 2010Acushnet CompanyComposite metal wood club
US7892109May 22, 2009Feb 22, 2011Acushnet CompanyMetal wood club with improved hitting face
US7931545Mar 22, 2010Apr 26, 2011Acushnet CompanyMetal wood club with improved hitting face
US7935001May 20, 2009May 3, 2011Acushnet CompanyComposite metal wood club
US7980963Jan 27, 2010Jul 19, 2011Acushnet CompanyMetal wood club with improved hitting face
US8007372Sep 21, 2010Aug 30, 2011Cobra Golf, Inc.Golf club head with localized grooves and reinforcement
US8025590Nov 22, 2010Sep 27, 2011Acushnet CompanyMetal wood club with improved hitting face
US8038544Nov 22, 2010Oct 18, 2011Acushnet CompanyComposite metal wood club
US8047930Jan 24, 2011Nov 1, 2011Acushnet CompanyMetal wood club with improved hitting face
US8128509Apr 25, 2011Mar 6, 2012Acushnet CompanyMetal wood club with improved hitting face
US8157670 *Aug 6, 2009Apr 17, 2012Nike, Inc.Golf club head or other ball striking device having face insert material
US8262502Jun 27, 2011Sep 11, 2012Acushnet CompanyMetal wood club with improved hitting face
US8277334Sep 15, 2011Oct 2, 2012Acushnet CompanyComposite metal wood club
US8342982Apr 15, 2010Jan 1, 2013Acushnet CompanyMetal wood club with improved hitting face
US8414422Nov 5, 2010Apr 9, 2013Callaway Golf CompanyExternal weight for golf club head
US8439769Apr 15, 2010May 14, 2013Acushnet CompanyMetal wood club with improved hitting face
US8449407Aug 3, 2011May 28, 2013Acushnet CompanyMetal wood club with improved hitting face
US8480512Apr 16, 2012Jul 9, 2013Nike, Inc.Golf club head or other ball striking device having face insert material
US8517858Apr 15, 2010Aug 27, 2013Acushnet CompanyMetal wood club
WO2005007249A2 *Jul 12, 2004Jan 27, 2005Tyler L DennisFaceplate backings and monolithic inserts for golf clubs
Classifications
U.S. Classification473/342
International ClassificationA63B53/04
Cooperative ClassificationA63B53/04, A63B2053/0416, A63B2053/0441
European ClassificationA63B53/04
Legal Events
DateCodeEventDescription
Oct 30, 1987ASAssignment
Owner name: CONNECTICUT BANK AND TRUST COMPANY, NATIONAL ASSOC
Free format text: SECURITY INTEREST;ASSIGNOR:WILSON SPORTING GOODS CO.,;REEL/FRAME:004811/0377
Effective date: 19870315
May 18, 1987ASAssignment
Owner name: FIRST NATIONAL BANK OF CHICAGO THE, AS AGENT
Free format text: SECURITY INTEREST;ASSIGNOR:FIRST NATIONAL BANK OF BOSTON THE, AS AGENT;REEL/FRAME:004707/0669
Effective date: 19870429
Nov 19, 1985ASAssignment
Owner name: FIRST NATIONAL BANK OF BOSTON, THE, AS AGENT
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WILSON SPORTING GOODS CO.;REEL/FRAME:004478/0306