US3116926A - Weighted baseball bat - Google Patents

Weighted baseball bat Download PDF

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Publication number
US3116926A
US3116926A US18757262A US3116926A US 3116926 A US3116926 A US 3116926A US 18757262 A US18757262 A US 18757262A US 3116926 A US3116926 A US 3116926A
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Prior art keywords
bat
end
locking
chamber
member
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Expired - Lifetime
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Arnold M Owen
Zanotti George John
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PHILIP C RIZZO
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PHILIP C RIZZO
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B59/00Bats, rackets or the like, not covered by groups A63B49/00 - A63B57/00
    • A63B59/50Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/18Baseball, rounders or similar games
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06Handles
    • A63B60/22Adjustable handles
    • A63B60/24Weighted handles

Description

Jan. 7, 1964 A. M. OWEN ETAL 3,116,926

WEIGHTED BASEBALL BAT Filed April 16, 1962 N a INVENTORS flrno/d M 8" G'eorye d Zano/f/ United States Patent 3,116,926 WEIGHTED BASEBALL BAT Arnold M. Owen, Box 88, Miller, Mo, and George John Zanotti, 4M8 N. Kaine, Schiller Park, iii, assignors of one-fourth to Charles W. Owens, Springfield, M0., and one-fourth to Philip C. Rizzo, Chicago, Ill.

Filed Apr. 16, N62, Ser. No. 187,572 1 Claim. (Cl. 27372) This invention relates to improvements in baseball bats and more particularly relates to an improved form of weighted baseball bat adapted to improve the batting ability of the batter.

A principal object of the invention is to provide a novel and improved form of baseball bat constructed with a view towards developing the wrist and forearm and the snap of the wrist of the batter.

A further object of the invention is to adapt a baseball bat to develop the batting action of the batter by selectively weighting the outer end of the bat.

Another object of the invention is to provide an improved form of baseball bat particularly arranged to develop the forearm and wrist and the snap of the wrist of the batter by selectively weighting the outer end portion of the bat and detachably retaining the weight therein in stationary relation with respect to the length of the bat, during use of the bat.

Still another object of the invention is to improve upon the baseball bats heretofore in use by providing a chamber extending axially along a bat and opening to the outer end thereof and by providing weights for selected insertion in said chamber, and locking the weights in position during use of the bat.

A still further object to the invention is to adapt a baseball bat for use in developing the forearms and wrist and the snap of the wrist of the batter, by forming a chamber extending axially along the bat and opening to the outer end thereof, and by placing a weight or weights in this chamber held to a locking member by spring means, and by mounting the locking member in the outer end of the chamber to accommodate the number of weights in the chamber to be varied.

These and other objects of the invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawing wherein:

FIGURE 1 is a plan view of a form of baseball bat embodying the principles of the present invention;

FTGURE 2 is a longitudinal sectional view taken through the outer end portion of the bat shown in FIG- URE 1;

FTGURE 3 is an end view of the bat looking at the bat toward the outer end thereof and showing the locking member for the weights in position in the end of the bat prior to movement of said lockin member to a locking position;

FIGURE 4 is an end view of the bat somewhat similar to FIGURE 3, but showing the locking member for the weights turned to a position to lock the weights to the bat;

FIGURE 5 is an end view of the inner end of the retainer prior to insertion of the retainer in the end of the baseball bat; and

FIGURE 6 is a sectional view taken substantially along line VT-VI of FIGURE 5.

In the embodiment of the invention illustrated in the drawings, we have shown in FIGURE 1 a baseball bat 11, which may be a regulation bat and vary in diameter at its largest end from 2%" to 2%" and vary in length from 29" to 36" depending upon the purposes for which the bat is used. The bat may also vary in weight from 25 ounces to 42 ounces.

"ice

The bat 11 is shown as being drilled from its outer end concentrically with the longitudinal axis thereof, and as having a metal sleeve 12 carried therein, the interior of which forms a chamber 13 carrying one or more weights 15. While we have herein shown a sleeve in the drilled portion of the bat, the principal function of the sleeve is to reinforce the bat and where strength is not necessary, the sleeve may be omitted.

The bat 11 is also shown as being counter drilled from its outer end portion to provide an enlarged diameter outer chamber portion 16. The enlarged diameter por tion 16 converges to the smaller diameter drilled portion of the bat and to the sleeve 12 along a beveled shoulder 17.

The enlarged diameter chamber portion 16 of the bat has a retainer 19 threaded therein, serving to retain a locking member 20 to the bat and to retain a selected number of weights 15 within the chamber 13.

The retainer 19 is shown in FIGURE 2 as being generally annular in form having an outer enlarged diameter or flanged portion 21 recessed within the head of the bat when the retainer 19 is threaded in position on the end of the bat. The retainer 19 has a generally cylindrical inner wall 22 having diametrically opposed slots 23 extending therealong, and affording communication to the inner end of said retainer. The inner end of the retainer 19 has a pair of diametrically opposed inwardly opening notches 25 formed therein, forming locking means for diametrically opposed pins 26 projecting from periphery of the locking member 20. The pins 26 are adapted to slide along the slots 23 of the retainer 19 when inserting the locking member to retain a weight or weights to the chamber 13, and to then arcuately move along the inner surface of the retainer 19 for registry with the notches 25. When in this position, a compression spring 27 seated on the inner end portion of the chamber 13 and in engagement with an innermost weight 15, will bias the pins 26 into engagement with the notches 25, and retain the locking member 20 and weight or weights 15 to the bat.

The locking member 2% has a transverse key 30 extending across its outer end portion, and generally semispherical portions 31 on each side of said key, said key provides a means for turning said locking member to lock the weight or weights 15 in position within the end of the bat, or to accommodate removal of said locking member from the retainer U, and the consequent removal or replacement of the weights in the end of the bat.

The weights 15 are shown as being generally cylindrical in form and may be made from lead or from any other desired material. It should be understood that the length and number of weights may be varied in accordance with the degree it is desired to weight the bat.

In assembling the bat, when a certain weight has been selected, the spring 27 is first placed through the retainer 19 and along the sleeve 12, with the bat held in a generally vertical position and the chamber 13 opening upwardly. The number of weights required may then be inserted through the retainer 19 in abutting engagement with the spring 27 and into abutting engagement with each other.

As the weights are placed along the chamber 13, and particularly where the spring 27 is materially compressed, it is desirable to maintain pressure on the outer weight with one hand and engage said weight with another weight with the other hand and then to press the weight along the chamber 13 against the compression spring 27. When the required number of weights have been added, the locking member 20 is inserted in the retainer 19, with the pins 26 thereof in registry with the slots 23. The locking member 20 is then depressed until the pins are beneath the inner or bottom surface of the retainer 19. The

locking member 20 may then be turned 90 to register the pins 26 with the notches 25. The spring 27 will thus engage and retain the pins 26 to the notches 25 and the Weights 15 will be locked in stationary positions within the chamber 13.

When it is desired to remove a weight from the chamber 13, it is merely necessary to depress the locking member 20 to release the pins 26 from the slots 25 and to then turn said locking member until the pins 26 register with the slots 23. The spring 27 will then force the locking member 20 and weights 15 from the end of the bat.

While we have herein shown and described one form in which our invention may be embodied, it may readily be understood that various modifications and variations in the invention may be attained without departing from the spirit and scope of the novel concepts thereof, as defined by the claim appended hereto.

We claim as our invention:

In a baseball bat, means varying the weight of the bat at the outer end portion thereof comprising:

a chamber opening to the outer end of the bat and extending axially along the bat for a portion of the length thereof,

a spring seated against the inner end of said chamber,

at least one weight in said chamber abutting said spring and biased toward the outer end of the bat by said spring, and means positively holding the Weight in said chamber and permitting the number 1g of weights in said chamber to be varied as selected, said means comprising an annular retainer encircling said chamber and recessed in the outer end portion of the bat and having a cylindrical inner wall, a locking member closing the end of said annular retainer and axially movable along said retainer and having at least one locking pin extending radially therefrom,

and bayonet-like slot means in said retainer registrable with said locking pin, and permitting axial movement of said locking member along said retainer to force a weight in said chamber against said spring,

said locking member and pin being turnable along said bayonet-like slot means, to lock said locking member in a closed position and to positively lock a selected number of weights in said chamber in position to weight the extreme outer end portion of said bat.

References Cited in the file of this patent UNITED STATES PATENTS 558,320 Solberg Apr. 14, 1896 1,499,123 Shroyer June 24, 1924 1,846,587 Diederich Feb. 23, 1932 2,750,194 Clark June 12, 1956 2,944,698 Pipes et al. July 12, 1960 FOREIGN PATENTS 174,550 Great Britain Feb. 2, 1922

US3116926A 1962-04-16 1962-04-16 Weighted baseball bat Expired - Lifetime US3116926A (en)

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Cited By (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521883A (en) * 1967-11-27 1970-07-28 Frank G Hamilton Baseball bat with training weight
US3575419A (en) * 1969-05-21 1971-04-20 Wallace E Davis Golf swing practice club
US3877698A (en) * 1973-11-28 1975-04-15 Michael A Volpe Baseball bat with replaceable ball-striking portion
US3955816A (en) * 1974-03-11 1976-05-11 Bratt Leonard R Warm-up bat
US3963239A (en) * 1972-03-23 1976-06-15 Hirokazu Fujii Baseball bat
US4050696A (en) * 1976-08-17 1977-09-27 Troncoso Fernando Jr Archery arrow
JPS55151973A (en) * 1979-05-14 1980-11-26 Yamaichi Seisakusho Kk Baseball bat
US4274631A (en) * 1978-03-08 1981-06-23 Tadao Hayazaki Baseball practice bat
US4315625A (en) * 1978-12-15 1982-02-16 Allen R. Shuffleboard Company Shuffleboard cue with selectively fixed or swivelled weighted runner
US4614343A (en) * 1985-02-11 1986-09-30 Snapper, Inc. Golf swing training device
US4671508A (en) * 1986-02-06 1987-06-09 Tetreault Albert G Practice bat
US4834370A (en) * 1985-07-24 1989-05-30 Kansas State University Research Foundation Method of optimizing the power zone of a bat
US4836541A (en) * 1987-07-14 1989-06-06 Henley Douglas R Lead arm development bat
US4898386A (en) * 1989-02-10 1990-02-06 Anderson Donald A Training bat
US4951948A (en) * 1989-04-17 1990-08-28 Peng Jung C Shock absorbing bat
US5071123A (en) * 1990-09-21 1991-12-10 Donald Spector Toy implements for storing and striking play balls
US5118102A (en) * 1989-04-19 1992-06-02 Bahill Andrew T Bat selector
US5244209A (en) * 1991-07-16 1993-09-14 Benzel William P Golf grip apparatus
US5277421A (en) * 1993-04-23 1994-01-11 John Rewolinski Weighted practice bat
US5393055A (en) * 1993-08-13 1995-02-28 Mckay, Jr.; Jack W. Ball bat with concentrated weight load and method of making same
US5415398A (en) * 1993-05-14 1995-05-16 Eggiman; Michael D. Softball bat
US5494280A (en) * 1993-07-30 1996-02-27 Mackay, Jr.; Jack W. Concave end cap with cone load for bats
US5779571A (en) * 1996-04-03 1998-07-14 Franz Volkl Gmbh & Co. Ball-game racket, in particular a tennis racket
US5785617A (en) * 1993-07-30 1998-07-28 Hillerich & Bradsby Co. Full barrel ball bat with end cap
US5899823A (en) * 1997-08-27 1999-05-04 Demarini Sports, Inc. Ball bat with insert
US5904803A (en) * 1996-06-03 1999-05-18 Hillerich & Bradsby Co. Apparatus for making a mold by heat shrinking
US5911637A (en) * 1997-02-28 1999-06-15 Yamagata; Shinichi Golf club
US5954602A (en) * 1998-10-02 1999-09-21 Demarini Sports, Inc. Bat end plug and method for making the same
US6042493A (en) * 1998-05-14 2000-03-28 Jas. D. Easton, Inc. Tubular metal bat internally reinforced with fiber and metallic composite
US6053828A (en) * 1997-10-28 2000-04-25 Worth, Inc. Softball bat with exterior shell
US6113501A (en) * 1998-04-29 2000-09-05 Richards; James M. Billiard cue stick accessory
US6139451A (en) * 1996-06-03 2000-10-31 Hillerich & Bradsby Co. Reinforced wood bat
WO2001008758A1 (en) * 1999-07-29 2001-02-08 Scott Brundage Training baseball bat and method
US6254502B1 (en) * 1995-07-14 2001-07-03 Sport Fun, Inc. Weighting system for sports balls and hitting implements
US6569042B2 (en) * 2001-01-16 2003-05-27 Lachance James L. Sports swing development device
US6575854B1 (en) * 2001-12-07 2003-06-10 Jian Kuo Yang Automatic adjusting device for adjusting the position of the center of gravity of an object
US6682447B1 (en) 2002-07-02 2004-01-27 Donald E. Black Training bat system
US20040023736A1 (en) * 2002-07-18 2004-02-05 Cardinale Ronald S. Training device and method of training a batter
US20040043846A1 (en) * 2002-08-28 2004-03-04 Haynes James M. System for adapting a sports implement
US20040053716A1 (en) * 2002-09-13 2004-03-18 Happy Wu Bat structure
US20040053715A1 (en) * 2002-07-12 2004-03-18 Mark Schwieg Variable weight end structure for sporting equipment handles
US20040127292A1 (en) * 2002-12-26 2004-07-01 Lancelot Ying Chih Chan Sparring weapon
US6767299B1 (en) * 2003-07-09 2004-07-27 Jung-Shih Chang Wood baseball bat
US20040162169A1 (en) * 2000-03-27 2004-08-19 Brian Gallagher Training bat and method
US20040224801A1 (en) * 2003-05-08 2004-11-11 Forsythe Paul D. Baseball bat with replaceable barrel
US20040224802A1 (en) * 2003-05-08 2004-11-11 Forsythe Paul D. Reconfigurable ball bat and method
US20050153800A1 (en) * 2004-01-08 2005-07-14 Jas D. Easton, Inc. Composite ball bat having a metal knob
US20050153797A1 (en) * 2004-01-12 2005-07-14 Nutter Mark E. Warm-up bat
US6918843B1 (en) 2001-01-30 2005-07-19 Micheal E. Franssen Baseball training bat
US6929573B1 (en) * 2004-03-10 2005-08-16 Jung-Shih Chang Bat for baseball
US6949036B2 (en) * 2000-11-07 2005-09-27 Baseball Marketing Ideas, L.L.C. Batting swing trainer and method
US7044858B1 (en) * 2005-01-12 2006-05-16 Enforcement Technology Group Inc. Variable weight expandable baton
US20070066424A1 (en) * 2005-09-16 2007-03-22 Bratt Richard L Warm-Up Bat
US20070173358A1 (en) * 2000-03-27 2007-07-26 Brian Gallagher Training bat and method
US7297077B1 (en) 2003-12-12 2007-11-20 Robert Battaglino Bat exercise, practice, and training device
US20080096736A1 (en) * 2006-06-30 2008-04-24 Richard Blackford Exercise device
US7399242B1 (en) 2006-06-28 2008-07-15 Smith Douglas R Weighted training bat
US20080234053A1 (en) * 2007-03-19 2008-09-25 Martin Philip Castro Adjustable defense baton
US20080305886A1 (en) * 2007-06-11 2008-12-11 Mei-Chu Yeh Golf putter head assembly
US20090143176A1 (en) * 2007-12-03 2009-06-04 Hillerich & Bradsby Co. Apparatus for deterring modification of sports equipment
US20100022326A1 (en) * 2006-11-21 2010-01-28 Mcclung Iii Guy Lamonte Game apparatuses
US20100081523A1 (en) * 2008-09-30 2010-04-01 Jonathan Davis Adjustably weighted training device and method of manufacture
US20100113181A1 (en) * 2002-11-12 2010-05-06 Vyatek Sports, Inc. Multi-material golf clubhead
US20100234144A1 (en) * 2009-03-11 2010-09-16 Michael Sutlovich Baseball bat with sliding contact zone
US20110143870A1 (en) * 2009-12-10 2011-06-16 Gregory Schulte Adjustable Sports Bat Plug Weight
US20120202622A1 (en) * 2011-02-04 2012-08-09 Gerald Sena Lacrosse training device
US8262544B1 (en) 2006-06-30 2012-09-11 Richard Blackford Exercise device
US8512175B2 (en) 2010-11-02 2013-08-20 Wilson Sporting Goods Co. Ball bat including a barrel portion having separate proximal and distal members
US20130252789A1 (en) * 2012-03-20 2013-09-26 Lance W. Hess Weighted exercise bar
US8556756B2 (en) 2011-03-25 2013-10-15 Karen Therese McClung Game apparatuses
US20130303297A1 (en) * 2012-05-11 2013-11-14 Charles Victor Mackie T/P weights 5
US20140342853A1 (en) * 2013-01-24 2014-11-20 Wilson Sporting Goods Co. Bat customization system
US8992352B1 (en) * 2012-01-13 2015-03-31 Vyatek Sports, Inc. Variable launch control bat
US9242155B1 (en) 2012-01-13 2016-01-26 Vyatek Sports, Inc. Barrel for a bat assembly and ball bat
US9242156B2 (en) 2013-01-24 2016-01-26 Wilson Sporting Goods Co. Tapered isolating element for a ball bat and system for using same
US9511267B2 (en) 2013-01-24 2016-12-06 Wilson Sporting Goods Co. Bat customization system
WO2017062681A1 (en) * 2015-10-07 2017-04-13 Easton Baseball/Softball Inc. Ball bat with adjustable-weight end cap
US9956464B2 (en) 2013-01-24 2018-05-01 Wilson Sporting Goods Co. Ball bat barrel with luminescent interior

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* Cited by examiner, † Cited by third party
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US558320A (en) * 1896-04-14 Indian club
GB174550A (en) * 1921-06-14 1922-02-02 Henry Taylor Improvements in or relating to golf clubs, tennis rackets, billiard cues, or like sporting implements
US1499128A (en) * 1922-05-27 1924-06-24 Jr William A Shroyer Baseball bat
US1846597A (en) * 1929-12-04 1932-02-23 Frederick W Hochstetter Radio circuit and method of operating same
US2750194A (en) * 1955-01-24 1956-06-12 Austin N Clark Golf club head with weight adjustment
US2944692A (en) * 1958-03-27 1960-07-12 Constock Liquid Methane Corp Expansible container for lowtemperature fluid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US558320A (en) * 1896-04-14 Indian club
GB174550A (en) * 1921-06-14 1922-02-02 Henry Taylor Improvements in or relating to golf clubs, tennis rackets, billiard cues, or like sporting implements
US1499128A (en) * 1922-05-27 1924-06-24 Jr William A Shroyer Baseball bat
US1846597A (en) * 1929-12-04 1932-02-23 Frederick W Hochstetter Radio circuit and method of operating same
US2750194A (en) * 1955-01-24 1956-06-12 Austin N Clark Golf club head with weight adjustment
US2944692A (en) * 1958-03-27 1960-07-12 Constock Liquid Methane Corp Expansible container for lowtemperature fluid

Cited By (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521883A (en) * 1967-11-27 1970-07-28 Frank G Hamilton Baseball bat with training weight
US3575419A (en) * 1969-05-21 1971-04-20 Wallace E Davis Golf swing practice club
US3963239A (en) * 1972-03-23 1976-06-15 Hirokazu Fujii Baseball bat
US3877698A (en) * 1973-11-28 1975-04-15 Michael A Volpe Baseball bat with replaceable ball-striking portion
US3955816A (en) * 1974-03-11 1976-05-11 Bratt Leonard R Warm-up bat
US4050696A (en) * 1976-08-17 1977-09-27 Troncoso Fernando Jr Archery arrow
US4274631A (en) * 1978-03-08 1981-06-23 Tadao Hayazaki Baseball practice bat
US4315625A (en) * 1978-12-15 1982-02-16 Allen R. Shuffleboard Company Shuffleboard cue with selectively fixed or swivelled weighted runner
JPS55151973A (en) * 1979-05-14 1980-11-26 Yamaichi Seisakusho Kk Baseball bat
US4614343A (en) * 1985-02-11 1986-09-30 Snapper, Inc. Golf swing training device
US4834370A (en) * 1985-07-24 1989-05-30 Kansas State University Research Foundation Method of optimizing the power zone of a bat
US4671508A (en) * 1986-02-06 1987-06-09 Tetreault Albert G Practice bat
US4836541A (en) * 1987-07-14 1989-06-06 Henley Douglas R Lead arm development bat
US4898386A (en) * 1989-02-10 1990-02-06 Anderson Donald A Training bat
US4951948A (en) * 1989-04-17 1990-08-28 Peng Jung C Shock absorbing bat
US5118102A (en) * 1989-04-19 1992-06-02 Bahill Andrew T Bat selector
US5071123A (en) * 1990-09-21 1991-12-10 Donald Spector Toy implements for storing and striking play balls
US5244209A (en) * 1991-07-16 1993-09-14 Benzel William P Golf grip apparatus
US5277421A (en) * 1993-04-23 1994-01-11 John Rewolinski Weighted practice bat
US5415398A (en) * 1993-05-14 1995-05-16 Eggiman; Michael D. Softball bat
US5931750A (en) * 1993-07-30 1999-08-03 Hillerich & Bradsby Co. Full barrel ball bat with end cap
US5494280A (en) * 1993-07-30 1996-02-27 Mackay, Jr.; Jack W. Concave end cap with cone load for bats
US5785617A (en) * 1993-07-30 1998-07-28 Hillerich & Bradsby Co. Full barrel ball bat with end cap
US5393055A (en) * 1993-08-13 1995-02-28 Mckay, Jr.; Jack W. Ball bat with concentrated weight load and method of making same
US6254502B1 (en) * 1995-07-14 2001-07-03 Sport Fun, Inc. Weighting system for sports balls and hitting implements
US5779571A (en) * 1996-04-03 1998-07-14 Franz Volkl Gmbh & Co. Ball-game racket, in particular a tennis racket
US6139451A (en) * 1996-06-03 2000-10-31 Hillerich & Bradsby Co. Reinforced wood bat
US5904803A (en) * 1996-06-03 1999-05-18 Hillerich & Bradsby Co. Apparatus for making a mold by heat shrinking
US5911637A (en) * 1997-02-28 1999-06-15 Yamagata; Shinichi Golf club
US5899823A (en) * 1997-08-27 1999-05-04 Demarini Sports, Inc. Ball bat with insert
US6159116A (en) * 1997-10-28 2000-12-12 Pitsenberger; Dan S. Softball bat with exterior shell
US6053828A (en) * 1997-10-28 2000-04-25 Worth, Inc. Softball bat with exterior shell
US6287222B1 (en) 1997-10-28 2001-09-11 Worth, Inc. Metal bat with exterior shell
US6113501A (en) * 1998-04-29 2000-09-05 Richards; James M. Billiard cue stick accessory
US6042493A (en) * 1998-05-14 2000-03-28 Jas. D. Easton, Inc. Tubular metal bat internally reinforced with fiber and metallic composite
US5954602A (en) * 1998-10-02 1999-09-21 Demarini Sports, Inc. Bat end plug and method for making the same
WO2001008758A1 (en) * 1999-07-29 2001-02-08 Scott Brundage Training baseball bat and method
US6280353B1 (en) * 1999-07-29 2001-08-28 Scott A. Brundage Training baseball bat and method
US6692386B2 (en) * 1999-07-29 2004-02-17 Scott Brundage Training sports club and method
US20040162169A1 (en) * 2000-03-27 2004-08-19 Brian Gallagher Training bat and method
US20070173358A1 (en) * 2000-03-27 2007-07-26 Brian Gallagher Training bat and method
US20050096161A1 (en) * 2000-03-27 2005-05-05 Brian Gallagher Training bat and method
US6949036B2 (en) * 2000-11-07 2005-09-27 Baseball Marketing Ideas, L.L.C. Batting swing trainer and method
US6569042B2 (en) * 2001-01-16 2003-05-27 Lachance James L. Sports swing development device
US6918843B1 (en) 2001-01-30 2005-07-19 Micheal E. Franssen Baseball training bat
US6575854B1 (en) * 2001-12-07 2003-06-10 Jian Kuo Yang Automatic adjusting device for adjusting the position of the center of gravity of an object
US6682447B1 (en) 2002-07-02 2004-01-27 Donald E. Black Training bat system
US7198581B1 (en) * 2002-07-02 2007-04-03 Black Donald E Training bat system
US20040053715A1 (en) * 2002-07-12 2004-03-18 Mark Schwieg Variable weight end structure for sporting equipment handles
US20040023736A1 (en) * 2002-07-18 2004-02-05 Cardinale Ronald S. Training device and method of training a batter
US20040043846A1 (en) * 2002-08-28 2004-03-04 Haynes James M. System for adapting a sports implement
US20040053716A1 (en) * 2002-09-13 2004-03-18 Happy Wu Bat structure
US20100113181A1 (en) * 2002-11-12 2010-05-06 Vyatek Sports, Inc. Multi-material golf clubhead
US20040127292A1 (en) * 2002-12-26 2004-07-01 Lancelot Ying Chih Chan Sparring weapon
US6875137B2 (en) * 2003-05-08 2005-04-05 Hoonforsythe Technologies Llc Reconfigurable ball bat and method
US6905429B2 (en) * 2003-05-08 2005-06-14 Hoonforsythe Technologies Llc Baseball bat with replaceable barrel
US20040224802A1 (en) * 2003-05-08 2004-11-11 Forsythe Paul D. Reconfigurable ball bat and method
US20040224801A1 (en) * 2003-05-08 2004-11-11 Forsythe Paul D. Baseball bat with replaceable barrel
US6767299B1 (en) * 2003-07-09 2004-07-27 Jung-Shih Chang Wood baseball bat
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