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US4555111A Expired / Lapsed US ⏱️ 0.0 years remaining

Practice bat

Assignee: Individual
•
Filing: 1983-08-26
•
Granted: 1985-11-26
•
Expires: 2003-08-26
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Abstract

Abstract A practice bat for baseball players including a handle portion, and a weighted end portion interconnected by a resilient spring. The weighted end portion is remote from the hands of the player holding the handle portion so that when the bat is swung the momentum of the weighted end portion will cause it to lag behind and then move ahead of a longitudinal at rest axis of the handle portion causing the player's wrists to break or bend.

Inventors

  • 👤 Manuel R. Alvarez

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 02:40
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/0002; A63B15/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 284 words
A baseball practice bat capable of being adjusted to the individual needs of a particular person during warmup to assist the person in snapping both wrists upon follow through during a swing of the arms comprising: an elongated handle portion of a length to receive both hands of a person and the handle portion has inner and outer ends with a hand stop formed at said outer end; a replaceable weighted end portion including outer and inner ends wherein said weighted end portion is annular and of a lesser length than said handle portion, and the hands are not to engage said weighted end portion when said practice bat is swung; a replaceable enlongated coil spring of at least several convolutions and having opposed ends, said spring interposed by releaseable securing means between said weighted end portion and the inner end of said handle portion; said releaseable securing means including plug means with a threaded bore in said inner end of said handle portion and a threaded bore in the inner end of said weighted end portion and threaded shafts projecting from each end of said coil spring ends engageable with said threaded bores for releaseable maintaining the handle portion, coil spring and weighted end portion together in an in line arrangement; and said in line arrangement creating a bat wherein all the parts have an elongated axis extending therethrough when in an at rest position, but upon swinging the same flexing at least a part of the coil spring and the weighted end portion rearward and forward of said axis due to the momentum of the weight in relation to the hands during said swing whereby both wrists of said person will snap.
Claim 2
Dependent Claim 284 words
A baseball practice bat capable of being adjusted to the individual needs of a particular person during warmup to assist the person in snapping both wrists upon follow through during a swing of the arms comprising: an elongated handle portion of a length to receive both hands of a person and the handle portion has inner and outer ends with a hand stop formed at said outer end; a replaceable weighted end portion including outer and inner ends wherein said weighted end portion is annular and of a lesser length than said handle portion, and the hands are not to engage said weighted end portion when said practice bat is swung; a replaceable enlongated coil spring of at least several convolutions and having opposed ends, said spring interposed by releaseable securing means between said weighted end portion and the inner end of said handle portion; said releaseable securing means including plug means with a threaded bore in said inner end of said handle portion and a threaded bore in the inner end of said weighted end portion and threaded shafts projecting from each end of said coil spring ends engageable with said threaded bores for releaseable maintaining the handle portion, coil spring and weighted end portion together in an in line arrangement; and said in line arrangement creating a bat wherein all the parts have an elongated axis extending therethrough when in an at rest position, but upon swinging the same flexing at least a part of the coil spring and the weighted end portion rearward and forward of said axis due to the momentum of the weight in relation to the hands during said swing whereby both wrists of said person will snap.
Claim 3
Dependent Claim 25 words
A practice bat as defined in claim 1 wherein said elongated coil spring is of a length less than the length of said handle portion.

References Cited (Backward Citations)

GB189420655A Cited
US979985A Cited
US1803134A Cited
US2714008A Cited
US3428325A Cited
US3451675A Cited
US4399996A Cited
US4249729A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-11-25 1989-05-27 1989-11-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-11-25 1993-05-27 1993-11-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-11-25 1997-05-27 1997-11-26 $7700.00 Window Closed / Lapsed

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