US3578801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Practice baseball bat
Assignee: Individual
•
Filing: 1968-12-30
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Granted: 1971-05-18
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Expires: 1988-12-30
Abstract
Abstract A hollow bat for baseball practice having an internal longitudinal rod and movable weight which will increase the inertia of the bat during the swing.
Inventors
- 👤 Raymond Piazza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:03
CPC Classifications
A; A63; A63B; A63B59/00; A63B59/50; A63B59/54; A63B60/00; A63B15/00; A63B15/005; A63B60/06; A63B71/00; A63B71/06; A63B71/0619; A63B71/0622; A63B2071/0625; A63B2071/0655; A63B2102/00; A63B2102/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
A practice baseball bat comprising: a body portion having a longitudinal bore therein; a handle portion; means detachably securing said handle portion to said body portion in the region of one end of said longitudinal bore; an elongated rod secured to said handle and extending within said body portion for substantially the full length of said bore; said elongated rod including a stop secured thereto remote from said handle portion; and weight means mounted on said rod for free-sliding movement along said rod under centrifugal force.
Claim 2
Dependent Claim
86 words
A practice baseball bat comprising: a body portion having a longitudinal bore therein; a handle portion; means detachably securing said handle portion to said body portion in the region of one end of said longitudinal bore; an elongated rod secured to said handle and extending within said body portion for substantially the full length of said bore; said elongated rod including a stop secured thereto remote from said handle portion; and weight means mounted on said rod for free-sliding movement along said rod under centrifugal force.
Claim 3
Dependent Claim
33 words
The combination in accordance with claim 1 wherein said stop is positioned to engage said weight means at the outermost end of said longitudinal bore to limit centrifugal movement of said weight means.
Claim 4
Dependent Claim
21 words
The combination in accordance with claim 1 wherein said stop is removable from said rod to allow exchange of weight means.
Claim 5
Dependent Claim
147 words
A practice baseball bat comprising: a plastic body portion having a longitudinal bore therein; said bore being closed at one end and open at the other end of the body portion; said body portion being tapered in diameter from a relatively small diameter at its open end to a relatively large diameter at its closed end; a plastic handle portion; means detachably securing said handle portion to the open end of said body portion; an elongated rod anchored at one end to said handle portion and extending within said body portion for substantially the full length of said bore; said rod having a stop removably secured to its end remote from said handle portion; weight means mounted on said rod for free-sliding movement under centrifugal force for substantially the entire length of said rod to provide maximum momentum when said bat is swung in an arcuate manner.
Claim 6
Dependent Claim
147 words
A practice baseball bat comprising: a plastic body portion having a longitudinal bore therein; said bore being closed at one end and open at the other end of the body portion; said body portion being tapered in diameter from a relatively small diameter at its open end to a relatively large diameter at its closed end; a plastic handle portion; means detachably securing said handle portion to the open end of said body portion; an elongated rod anchored at one end to said handle portion and extending within said body portion for substantially the full length of said bore; said rod having a stop removably secured to its end remote from said handle portion; weight means mounted on said rod for free-sliding movement under centrifugal force for substantially the entire length of said rod to provide maximum momentum when said bat is swung in an arcuate manner.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |