Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.


  1. Búsqueda avanzada de patentes
Número de publicaciónUS3697069 A
Tipo de publicaciónConcesión
Fecha de publicación10 Oct 1972
Fecha de presentación12 Nov 1970
Fecha de prioridad12 Nov 1970
Número de publicaciónUS 3697069 A, US 3697069A, US-A-3697069, US3697069 A, US3697069A
InventoresMerola Anthony
Cesionario originalAmerola Prod Corp
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Ball bat with eccentrically thickened walls
US 3697069 A
This invention relates to ball bats and particularly to a bat with a tubular metal body wherein the wall thickness of the tube is eccentric to present a stronger ball striking area when the bat is properly oriented.
Previous page
Next page
Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

United States Patent 15] 3,697,069 Merola [451 Oct. 10, 1972 [54] BALL BAT WITH ECCENTRICALLY [56] References Cited THICKENED WALLS UNITED STATES PATENTS 72 Inventor: Anthon Merola Pittsb ,P 1 y 3 3,138,380 6/1964 Satchel] et a]. ..273/s2 A [73] Assignee: Amerola Products Corporation, Pitt- 1,921,930 8/1933 Lagerblade ..273/81 R sburgh, Pa. i Primary Examiner-Anton O. Oechsle [22] Filed 1970 Assistant Examiner-Richard J. Apley [21] Appl. No.: 88,916 Attorney-Parmelee, Utzler & Welsh [57] ABSTRACT ..273 72 273/81 R, 82 R, 82 A; 138/172, 177, 178; 220/60 R thickness of the tube is eccentric to present a stronger ball striking area when the bat is properly oriented.

8 Claim, 8 Drawing Figures BALL BAT WITH ECCENTRICALLY THICKENED WALLS BACKGROUND OF THE INVENTION The invention relates to metal ball bats, and the method of making same is an improvement over my earlier US. Pat. No. 3,479,030 issued Nov. 18, 1969.

Bats made according to the above patent have proven quite successful for use in softball play and youth baseball or hardball play, however, problems were encountered in making an economical bat satisfactory for adult hardball play, The preferred method of making bats according to the above patent has been to use conventional extruded tubing which can be swaged as described in my earlier patent. For adult hardball play the wall of the tubing must be stronger than for softball to withstand the increased impact normally encountered. Merely increasing the wall thickness of the tubing, proved to be an unsatisfactory solution because the weight of the bat would be too great for acceptance by most adult players. To increase the hardness of the tube prior to swaging made the swaging step more difficult and cracking of the tubes occurred so that this alternative proved impractical. Another alternative would be to use materials suitable for softball play, swage, then heat treat to increase hardness, but this solution becomes too expensive and impractical for commercial acceptance.

SUMMARY OF THE INVENTION According to the present invention ball bats are made substantially as described in my earlier patent, however, the starting metal tubes, rather than being conventional tubes of uniform wall thickness, are eccentric in wall thickness. The initial tubes are formed with a predetermined arcuate portion of greater wall thickness than the remaining arcuate portion. In this manner a tube may be formed, as by extruding, swaged and finished as described in my earlier patent and the finished bat may be used for adult hardball play by orienting the bat to present the thicker arcuate sector as the ball striking portion. Metal which can readily be swaged can thereby be used and the body of the bat kept within acceptable weight limits. An indicia cam be placed on the bat to assist a batter in properly orienting it, as is now done with wood bats where orientation of the wood grain is recommended.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view in elevation of a ball hat of the present invention;

FIG. 2 is a fragmentary elevation view, in section of an embodiment of the inventive ball bat;

FIG. 3 is a view in section of the handle end portion of the ball bat with vibration-dampening means inserted therein which includes a knob-like restraining end;

FIG. 4 is a view in section of another embodiment of the handle end including a generally tubular gripping sleeve about the handle end, with the sleeve being closed at the extremity end by a flange which serves as a knob-like restraining end;

FIGS. 5, 6 and 7 are end elevations taken along lines V-V, Vl-VI and VII-VII respectively of FIG. 2 illustrating the wall thickness at various points along the FIG. 8 is an end elevation of another embodiment il-' lustrating a ball bat with a different cross-sectional configuration, again with the relative wall thicknesses being exaggerated to facilitate showing the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, the ball bat 10 comprises an elongated hollow metal body 11, vibration-dampening rubberous plugs l2, 13 which may be inserted respectively at the handle end and the free end portions of the body 11. A knob lla may be affixed to the handle end portion. The metal body 11 generally comprises three sections or zones, A, B and C approximately equal in length. The body increases in external diameter from the section A to the portion C. The external diameter is generally constant along sections A and C, but of a greater diameter along C. The external diameter in section B tapers along its length from a diameter equal to section C down to a diameter equal to section A.

As can be seen in FIG. 2 and FIGS. 5 through 7, the wall thickness of any cross-sectional portion of the body 11 is eccentric. A predetermined contiguous arcuate wall sector along the length of the body is thickened relative to the remaining wall sector, so that the wall thickness in cross section is eccentric along the length of the bat in the preferred embodiment, whereby the thickened contiguous arcuate wall portion is utilizable as the ball striking portion when properly aligned by the batter. The eccentric wall portion may only extend along the free end portion which serves as the ball striking portion.

A cross-sectional angular wall sector of the reduced diameter handle portion has a wall thickness greater than the wall thickness of a substantially correspondingly cross-sectional angular sector of the free end portion of the preferred embodiment, as is clearly shown in FIGS. 5 and 7.

The handle end portion wall thickness need not necessarily exceed the wall thickness of the free end thin or thick arcuate wall sector in practicing the invention. This is particularly the case when the eccentric wall cross section extends along the full length of the bat.

The body 11 is preferably formed by the process of the invention which comprises forming a metallic generally tubular member, preferably by extrusion, having an eccentric cross-sectional wall thickness, with a constant external diameter, and being approximately equal in length to the desired final bat length. The external diameter of the tubular member is preferably of the same diameter as desired for portion C of the bat. The tubular member is then swaged to contour the portions A and B of the bat while thickening the walls thereof particularly in handle portion A. The swaged, resultant ball bat has a smooth, seamless surface which is ready for use.

The body 11 is preferably aluminum or an aluminum alloy of suitable hardness and temper as described in the US. Pat. No. 3,479,030, the teachings of which are incorporated herein. Aluminum alloys which can be used for example, include 6061T6 aluminum and 7005T53 aluminum available from the producers of aluminum. The wall thickness of the eccentric crosssectional starting tube is for example about 0.08 inches at the thinnest wall sector, and about 0.11 inches at the thickest wall sector, with the wall thickness increasing approximately symmetrically from the thin portion to the thick portion. The handle portion in the preferred embodiment will also remain eccentric after the swaging, forming operation, but, of course, the wall thickness of the handle thick and thin wall arcuate portions will be correspondingly greater. The resultant ball bat will have a substantially uniform weight per unit length.

The wall thickness of the eccentric cross-sectional generally tubular body 11 can, of course, be varied. It is desirable that the deviation of the thick wall and thin wall portions from the average of the maximum and minimum thicknesses be greater than about 10 percent, and preferably about 10-15 percent. The deviation from the average wall thickness cannot be so great when a swaging operation is used in forming the final product that the product becomes distorted.

The contiguous arcuate sector which has a wall thickness exceeding the average wall thickness should extend for at least about 90 to provide a sufficient strengthened striking portion, and it preferably extends for about 180 or more. This thick wall portion is aligned by the batter to strike the ball, as is now done by a batter using a conventional wood bat having a grain. A suitable external marking can be provided on the ball bat of the present invention is assisting the batter to align the bat properly.

After the body 11 has been formed the vibrationdamping rubberous plugs 12, 13 can be inserted into the handle and free end portions respectively. The plugs 12, 13 are formed to fit the interior of body 11. Such plugs and the use of an adhesive material to secure the plugs to the body are described in the aforementioned patent. The plug 13 shown in FIG. 2 at the free end portion has a bulbous extending end portion 14 and a generally cylindrical insertion end portion 15 which is fastened to the body 11, by a fastening pin 16, which extends through the insertion end portion 15, and is affixed to the wall of the body 1 1.

Another way of restraining the plug within the body 11 which can be used cooperatively or by itself, is to provide a raised surface 17 on the interior wall of body 11. This can be a circumferentially extending raised surface or a series of raised surfaces. The rubberous plug 13 can be grooved to accept the raised surface portion of the body 11.

A modified vibration-damping rubberous plug 12 is shown in FIG. 3. The plug is shaped to tightly fit within the bat handle, with a generally cylindrical portion 18 inserted into the bat handle. The end of the bat handle fits within a circumferential channel portion 19 of the plug, and a bulbous, knob-like extremity end portion 20 of the plug extends out beyond the end of the bat handle. The knob-like extremity acts as a restraint for the batters hands. A fastening pin 21 extends through the bat handle and the cylindrical portion of the plug, with the pin being affixed to the bat handle.

A generally tubular gripping sleeve 22 can be tightly fitted over the handle end portion as seen in FIG. 4. The sleeve can be of any suitable material which facilitates gripping the ball bat, and an adhesive material can be used between the sleeve 22 and the bat to secure the sleeve thereto. The gripping sleeve 22 also preferably has a closed end portion 23 which includes a flange portion 24 of a diameter exceeding the tubular sleeve diameter to thereby serve as a knob-like restraining end.

An alternative ball bat embodiment is shown in FIG. 8, wherein the cross section of the wall of the body 11 is stepped, having a thin wall portion 25 and the thick wall portion 26. The generally tubular body 11 would be extruded in this fashion and then swaged to produce the ball bat of the present invention. The thick wall portion 26 preferably extends through at least about a arcuate sector of the tubular body.

1 claim:

1. A ball bat comprising an elongated hollow metal body with a ball striking portion of predetermined outer diameter tapering through an intermediate portion of a predetermined outer diameter to a handle portion of reduced outer diameter, vibration dampening means disposed at least at one end of the hollow metal body, and a hand restraining knob means disposed at the handle end of the ball bat, the wall thickness of any cross section of said striking portion and said intermediate portion being similarly eccentric throughout their length, said eccentricity being of a predetermined contiguous arcuate wall sector of greater thickness than the remaining wall sector, and wherein said bat has a substantially uniform weight per unit length along a substantial portion of the bat length, and means provided on the exterior surface of the bat coinciding with the wall thickened arcuate sector of said striking portion to indicate to the user the proper orientation of the ball bat.

2. The ball bat as specified in claim 1, wherein the predetermined contiguous arcuate sector preferably extends through an angle of about 180 or more.

3. The ball bat as specified in claim 1, wherein vibration-dampening means are disposed at both ends of the hollow metal body.

4. The ball bat as defined in claim 1, wherein the thickened contiguous arcuate sector has a maximum thickness which is approximately 10 to 15 percent greater than the average of the maximum and minimum wall thickness.

5. The ball bat as defined in claim 1, wherein the outer edge of the free end portion is provided with an internal bead, and including a rubberous plug disposed in the free end portion, the plug having a bead-receiving recess formed therein for restraining the plug when inserted in the free end portion.

6. The ball bat as defined in claim 1 including a rubberous plug disposed in the free end portion, and a restaining pin passing through the plug and the walls of the body.

7. The ball bat as specified in claim 1, including a generally tubular gripping sleeve on the handle portion.

8. The ball bat specified in claim 1, wherein said metal body substantially comprises aluminum.


Patent No. QIIiQYIOQQ Dated October 10, 1972 Inventor(s) Anthony Merola It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

[ Please correct item 56 References Cited on '1 the first page of the patent to include the references listed below;

, UNITED STATES PATENTS 3,473,030 11/69 Merola 273/72 1,323,009 3/33 Dornier 138/177 2,001,145 11/36 Duffy 220/ 01; 3,372,932 3/68 M0115 273/8lrx 1 ,493,128 6/24 Shroyer 273/72 1,311,353 12/26 Middlekauff 273/72 1,833,912) 1/32 Hall 273/8010 3,451,434 6/69 Bauer 138/172 1 FOREIGN PATENTS 468,214, 3 1950 Canada 658,441 10/1951 Great Britain Signed and sealed this 13th day of March 1973 (SEAL) Attest;

R M.FLETCHER JR. ROBERT (EOTTSCHALK i i t e s zing Officer Commissioner of Patents

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US1921930 *1 Sep 19318 Ago 1933Horton Mfg CompanyGolf club shaft
US3138380 *20 Nov 195923 Jun 1964Brunswick CorpBowling pin
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US3801098 *17 Ene 19722 Abr 1974Nl Industries IncMetal baseball bat
US3834698 *25 Ago 197110 Sep 1974Pouzou ABall bat
US3854316 *22 Ene 197317 Dic 1974Aluminum Co Of AmericaMethod of making a hollow metal bat with a uniform wall thickness
US3927466 *28 Feb 197423 Dic 1975Airlite Aluminum CorpMethod of making metal ball-bat
US4000895 *18 Ago 19754 Ene 1977Reynolds Metals CompanyBall bat
US4090709 *6 Oct 197523 May 1978Hirokazu FujiiStructure for preventing removal of grip covers from metallic bats
US5364095 *21 May 199115 Nov 1994Easton Aluminum, Inc.Tubular metal ball bat internally reinforced with fiber composite
US5395108 *19 Ene 19947 Mar 1995Easton Aluminum, Inc.Simulated wood composite ball bat
US638310010 May 20017 May 2002Worth, Inc.Bat with varying circumferential wall thickness
US72141526 Oct 20058 May 2007Rawlings Sporting Goods Company, Inc.Bat having a sleeve with slots
US72940734 Oct 200513 Nov 2007Miken Sports, LlcBat having a sleeve with holes
US736110626 Oct 200622 Abr 2008Rawlings Sporting Goods Company, Inc.Bat having a sleeve with slots
US737119610 Jun 200513 May 2008Warrior Sports, Inc.Lacrosse handle
US737786726 Oct 200627 May 2008Rawlings Sporting Goods Company, Inc.Bat having a sleeve with holes
US7404775 *3 Mar 200529 Jul 2008Warrior Lacrosse, Inc.Handle for a lacrosse stick
US753417926 Sep 200719 May 2009Miken Sports, LlcBat having a sleeve with holes
US753418015 Feb 200819 May 2009Miken Sports, LlcBat having a sleeve with slots
US7621832 *31 Mar 200824 Nov 2009Warrior Sports, Inc.Handle for a lacrosse stick
US7766772 *18 Ago 20033 Ago 2010Warrior Sports, Inc.Lacrosse handle
US7878930 *15 Nov 20071 Feb 2011Leinert Bruce RBaseball bat
US797222722 May 20095 Jul 2011Warrior Sports, Inc.Lacrosse handle with gripping structure
US8066594 *10 Ene 201129 Nov 2011Leinert Bruce RBaseball bat
US8323131 *28 Nov 20114 Dic 2012Leinert Bruce RBaseball bat
US88015513 Dic 201212 Ago 2014Bruce R. LeinertBaseball bat
US9242155 *14 Mar 201326 Ene 2016Vyatek Sports, Inc.Barrel for a bat assembly and ball bat
US952696011 Ago 201427 Dic 2016Bruce R. LeinertBaseball bat
US20040121864 *18 Ago 200324 Jun 2004David MorrowLacrosse handle
US20050209029 *3 Mar 200522 Sep 2005David MorrowImproved handle for a lacrosse stick
US20050277495 *10 Jun 200515 Dic 2005David MorrowLacrosse handle
US20070184923 *20 Abr 20059 Ago 2007David MorrowLacrosse handle
US20080153635 *7 Mar 200826 Jun 2008David MorrowLacrosse handle
US20080242453 *31 Mar 20082 Oct 2008David MorrowHandle For A Lacrosse Stick
US20080261731 *31 Oct 200723 Oct 2008Morrow David KLacrosse Handle
US20090131206 *15 Nov 200721 May 2009Leinert Bruce RBaseball bat
US20090291783 *22 May 200926 Nov 2009Warrior Sports, Inc.Lacrosse handle with gripping structure
US20110105256 *10 Ene 20115 May 2011Leinert Bruce RBaseball bat
US20120135827 *28 Nov 201131 May 2012Leinert Bruce RBaseball bat
WO1989005676A1 *23 May 198829 Jun 1989Kansas State University Research FoundationTubular bats with optimized power zone
Clasificación de EE.UU.473/566
Clasificación internacionalA63B59/06, A63B59/00
Clasificación cooperativaA63B59/06
Clasificación europeaA63B59/06