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Publication numberUS2364955 A
Publication typeGrant
Publication dateDec 12, 1944
Filing dateApr 1, 1943
Priority dateApr 1, 1943
Publication numberUS 2364955 A, US 2364955A, US-A-2364955, US2364955 A, US2364955A
InventorsWilliam H Diddel
Original AssigneeWilliam H Diddel
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Golf ball
US 2364955 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Dec. 12, 1944. w. H. DIDDEL GOLF BALL Filed April 1, 1943 Affo 'ne s,

Patented Dec. 12, 1944 UNITED STATES PATENT OFFICE GOLF BALL William H. Diddel, Indianapolis, Ind.

Application April 1, 1943, Serial No. 481,385

2 Claims.

This invention relates to a golf ball of a construction whereby a golf game may be played in exactly the same manner as heretofore but upon a greatly reduced course area. The invention mbodies a structure which will give the ball the same feel as the heretofore commonly used ball but which will have considerably less rebound or resilience. At the same time the structure will permit the ball to be played by the same force applied by the clubs. The structure will give the same sound upon impact of the club with the ball. The ball will be of the same approximate size or slightly increased in diameter thereover, this slight increase aiding in increasing wind resistance.

By use of a ball embodyin the structure of the invention, the ordinarygolf course of some 135 acres may be reduced to a fifteen acre size which will permit the course to be introduced into congested areas, such as in cities, or in areas where the space is otherwise necessarily limited, such as in military service camps, schools, and the like. A primary object of the invention is to reduce the over-all cost of playing golf without sacrificing to any material degree the sport of the game. Furthermore, by use of the invention, permitting the reduced size of course, golf may be played on a lighted course after dark in order to make the game available to a far greater number of persons, particularly those who may be engaged at the present in defense work plants during the daytime.

Reference is made to the accompanying drawing, in which Fig. 1 is a view of a golf ball in partial section and embodying the invention;

Fig. 2, a view in section on the line 2-2 in Fig. 1;

Fig. 3, a view in diametrical section of a golf ball embodying a slightly modified form of structure; and

Fig. 4, a view in diametrical section of a golf ball embodying a still further modified form of the invention.

Like characters of reference indicate like parts in the several views in the drawing.

While it is desired that the resilience or rebound of the present type of golf ball be mate rially reduced, it is also desirable that the ball has a low enough specific gravity which will permit it to fioat in case it drops into water hazards. Furthermore with the reduction in resilience, it is highly desirable to have a reduction in weight in order that the ball have the same feel as the present ball, otherwise this feel" would give a heavy reaction to the player on account of the reduced resilience. Therefore the invention, among other things, involves the idea of reducing the weight as much as possible along with the reduction of rebound.

A natural rubber compounded to have high hysteresis loss under impact, or a polymeric material, such as any one of the synthetic materials known as butyl rubber, "buna rubber'77, buna rubber S, vinyl acetate, vinyl chloride, and in fact any natural or synthetic resin with well known plasticizers, may be employed to form the body of the ball providing such material, while elastic, has a very high mechanical hysteresis loss. Such material further must have a good, impact-cutting resistance, capable of a high degree of distortion with a relatively low rate of retraction or restoration to original shape. This high mechanical hysteresis loss is characteristic ofthe materials above named, particularly in some of their polymeric forms when so designed.

As a generic term, the word rubber will be employed hereinafter to indicate any one of the materials selected from the above named group. A core I ll is formed of less diameter than that of the finished ball and in this core is carried a plurality of cavities into which materials may be inserted and confined by the outer layer or cover ll of the ball. 1

Referring to that form of the invention as illustrated in Figs. 1 and 2, the core I'll, while preferably molded as an integral unit, may be considered as embodying six symmetrical, equal size sections. Fig. 2 illustrates in sectional view one of these sections and shows as cavities a plurality of cylindrical bores l2. The center bore, Fig. l,

is located to be radial of the core but all of the other bores are parallel thereto and of decreasing lengths in reference to their positions ranging upwardly. Each section of-the core I0 is similarly provided with these bores I 2.

Into each of the bores I2 is inserted a frangible material in rod-like form. A preferred material is magnesium oxide on account of its lightness and the fact that in the finished ball, these rodlike pencils carried in the various bores I2 will break up into finely divided powder following some use of the ball. Among other materials suitable for filling these cavities 12 are pumice stone, mica, balsa wood in stick form, charcoal, and a granulated cork held in stick form with a. frangible binder.

Following the filling of these cavities 12 with the selected material above indicated, the outer layer or cover ll of the ball is applied and vulfor a substantially 1.1 specific gravity, and thediameter of the ball is made to be 1.75 inches, and that the magnesium oxide is employed as the filler, the amount of magnesium oxide required for a particularly good functioning ball would be 33% by volume to the balance of 67% of the synthetic resin. By weight the proportion of filler would be 11.7%. These proportions may vary, of course, depending upon the filler and body material selected. However, the proportions will fall in any event between well defined limits of 65% to 80% by volume of the body material and with the corresponding 35% to of the filler material. In terms of weight, this range would be from 87% to 93% of the body material with the corresponding 13% to 7% of the filler material.

The filler material serves to back up the relatively soft synthetic rubber to prevent undue distortion thereof under impact so as to keep that distortion within the range whereby the original form'of the ball will be restored eventually although slowly, as above indicated. Since the filler, even the balsa wood, will break up into finely divided particles after the ball has been used in play for a short period of time, the filler will not remain in a rigid pencil form but will yield to some extent, but also absorb the impact energy to transfer it to innermost portions of the ball. It is to be noted that there is no air or gas cavity as such within the ball.

Further by adding the fillermaterial, the overall weight of the ball, which would otherwise be quite high, is materially reduced and, in fact, when the above indicated proportion of materials is employed, the resultant ball will have a weight below the specific gravity of water, providing, of course, too much loading has not been employed in the synthetic resin.

The internal loading by the filler very materially reduces the rebound, but the feel of the ball upon impact of the club will be substantially the same to the player as that experienced with the heretofore type of ball. The resultant ball will have a rating of less than 45 on the Goodyear resilience test.

Referring to that form of the invention shown in Fig. 3, heavier masses of the filler are employed by inserting wedge-like segments [3 of the filler in radially disposed positions around the core. In this form, however, the location of the filler in such concentrated masses brings that material closer in effect to the periphery of the ball to reduce the concentrated weight near the outside.

In the form shown in Fig. 4, this distribution of weight is better in that the filler is brought closer to the center but is in relatively large masses since the filler is divided into eight equal sections I4. In this form there is a relatively thick layer of the synthetic resin which is not reinforced in effect with the filler material nor is the filler material distributed therethrough although the weight is largely concentrated in the outer portion of the ball.

Whilel have herein shown and described my invention in the best form known to me, it is obvious that structural variations may be employed Without departing from the spirit of the invention and I therefore do not desire to be limited to that precise form beyond the limitations as may be imposed by the following claims.

I claim:

1. A golf ball comprising a spherical body made of a rubber characterized by high mechanical hysteresis loss under impact; and filler material imbedded in the body distributed in regular manner therearound,-said filler material being of a frangible nature to break up into a comminuted state upon body impact; said filler material consisting of magnesium oxide. I

2. A golf ball comprising a spherical body made of a material characterized by high mechanical hysteresis loss under impact, said material being one of the materials of the group consisting of compounded latex rubber, butyl rubber, bun-a rubber 77, buna rubber S, vinyl acetate, and vinyl chloride; a filler material imbedded in the body distributed in regular manner therearound, said filler material being of a frangible nature to break up into a comminuted state upon body impact; said filler material being one of the materials of the group consisting of magnesium oxide, mica, pumice stone, balsa wood, charcoal, and granulated cork.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3265392 *Jun 15, 1965Aug 9, 1966Burnswick CorpLightweight bowling ball
US3515389 *Jun 19, 1967Jun 2, 1970Wolfe Norman BGame club and ball of butyl rubber
US4201384 *May 25, 1977May 6, 1980Jerry BarberSet of golf balls
US4531742 *Oct 31, 1983Jul 30, 1985Craycraft Steven RGolf game apparatus
US5497996 *Sep 30, 1994Mar 12, 1996Dunlop Slazenger CorporationGolf ball
US5836832 *Aug 29, 1996Nov 17, 1998Acushnet CompanyGolf ball
US5842936 *Aug 15, 1996Dec 1, 1998Mast; TimothyGolf ball
US5882567 *Feb 16, 1996Mar 16, 1999Acushnet CompanyMethod of making a golf ball having multiple layers
US5931747 *Sep 23, 1997Aug 3, 1999Mast; TimothyGolf ball
US6120393 *Feb 11, 1999Sep 19, 2000Spalding Sports Worldwide, Inc.A cover comprising a high acid ionomer resin including a copolymer of >16% by weight of an alpha, beta-unsaturated carboxylic acid and an alpha olefin, of which about 10-90% of the carboxyl groups of the copolymer are neutralized
US6142887 *Feb 20, 1998Nov 7, 2000Spalding Sports Worldwide, Inc.A golf ball comprising a core, a spherical mantle comprising a polymeric material and a reinforcing material dispersed therein, and a polymeric outer cover disposed about and adjacent to the mantle
US6155935 *Apr 20, 1999Dec 5, 2000Bridgestone Sports Co., Ltd.Golf ball
US6193618Feb 11, 1999Feb 27, 2001Spalding Sports Worldwide, Inc.Low spin golf ball comprising a mantle with a cellular or liquid core
US6244977Nov 12, 1997Jun 12, 2001Spalding Sports Worldwide, Inc.Comprising a spherical metal mantle of steel, titanium, chromium, nickel, and alloys thereof; a polymeric outer cover of lower acid ionomer, thermoplastic elastomer, and thermosettable polymer; and cellular core of polyolefin
US6293877Dec 29, 1998Sep 25, 2001Acushnet CompanyGolf ball
US6309312Nov 7, 1997Oct 30, 2001Spalding Sports Worldwide, Inc.Golf ball comprising a metal mantle having a hollow interior
US6432000Mar 13, 2000Aug 13, 2002Spalding Sports Worldwide, Inc.Multilayer golf ball with filled inner layer having dual core, liquid core, or wound core
US6435985Nov 9, 2000Aug 20, 2002Spalding Sports Worldwide, Inc.Low spin golf ball comprising a mantle with a cellular or liquid core
US6485378Nov 23, 1999Nov 26, 2002Acushnet CompanyGolf ball
US6561927Nov 9, 2000May 13, 2003Spalding Sports Worldwide, Inc.Improved two-piece; soft core and a hard cover from blends of one or more specific hard, high stiffness ionomers
US6595874Mar 29, 2001Jul 22, 2003Acushnet CompanySelectively weighted golf ball
US6612939Sep 14, 2000Sep 2, 2003The Top Flite Golf CompanyGolf ball comprising a metal, ceramic, or composite mantle or inner layer
US6663509Aug 13, 2002Dec 16, 2003Callaway Golf CompanyMultilayer golf ball with filled inner layer having dual core, liquid core, or wound core
US6929567Apr 16, 2003Aug 16, 2005Acushnet CompanySelectively weighted golf ball
US7211007Apr 7, 2005May 1, 2007Acushnet CompanyGolf ball having visible non-spherical insert
US7435192Mar 26, 2007Oct 14, 2008Acushnet CompanyGolf ball having visible non-spherical insert
US8568250 *Jul 7, 2010Oct 29, 2013Nike, Inc.Golf ball with cover having zones of hardness
US20120010025 *Jul 7, 2010Jan 12, 2012Nike, Inc.Golf Ball with Cover Having Zones of Hardness
U.S. Classification473/372, 473/377, 273/DIG.200, 473/352, 156/276
International ClassificationA63B43/00, A63B37/00
Cooperative ClassificationY10S273/20, A63B37/0003, A63B37/0055, A63B37/0097, A63B2043/001
European ClassificationA63B37/00G12D38, A63B37/00G