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US5827142A Expired / Lapsed US ⏱️ 0.0 years remaining

Air-pressurized baseball bat

Assignee: Individual
•
Filing: 1995-02-06
•
Granted: 1998-10-27
•
Expires: 2015-02-06
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Abstract

Abstract A light-weight, air-pressurized baseball bat useable by children to strike a ball, the bat having an enhanced striking power. The bat comprises striker and handle sections joined together by a coupler. The striker section is defined by a shell of synthetic plastic material whose shape is similar to that of a standard two-liter soda bottle. The shell is adapted to envelop a charge of compressed air and is provided with a half neck in which a valve plug is installed whose inlet projects therefrom. The handle section is provided at its upper end with a half neck that complements that of the striker section, the two-half necks being clamped together by the coupler which has a port therein to accommodate the valve inlet. By injecting compressed air into the striker section through the valve, the compressed air enveloped by the shell functions as a trampoline which when the ball impinges on the shell then acts to boost the rebound of the ball, thereby enhancing the striking power of the bat.

Inventors

  • 👤 Mark Rappaport

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 04:11
CPC Classifications
A; A63; A63B; A63B59/00; A63B59/50; A63B59/54; A63B2102/00; A63B2102/18; A63B2208/00; A63B2208/12; A63B2210/00; A63B2210/50; A63B2225/00; A63B2225/62; A63B60/00; A63B60/50

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 187 words
A light-weight, air-pressurized baseball bat useable by children to strike an oncoming ball so that it is driven a relatively great distance; said bat comprising: A. a striker section defined by a shell of thin, flexible synthetic plastic film material to create an enclosed envelope impermeable to air having a shape and size similar to that of a striker section of a conventional baseball bat, said shell being provided with a one-way valve through which air is injected to produce in the envelope a compressed air charge well above atmospheric pressure whereby the charge of compressed air acts as a pneumatic spring and said shell acts as a taut spring-loaded trampoline sheet thereby causing a ball impinging thereon to rebound and be driven a relatively great distance; B. a handle section; and C. a coupler joining the handle section to the striker section to complete the bat, said valve being formed by a rubber plug which is penetrable by a hypodermic needle to inject compressed air in said envelope, said shell being provided at a lower end with a half neck in which the valve is installed.
Claim 2
Dependent Claim 187 words
A light-weight, air-pressurized baseball bat useable by children to strike an oncoming ball so that it is driven a relatively great distance; said bat comprising: A. a striker section defined by a shell of thin, flexible synthetic plastic film material to create an enclosed envelope impermeable to air having a shape and size similar to that of a striker section of a conventional baseball bat, said shell being provided with a one-way valve through which air is injected to produce in the envelope a compressed air charge well above atmospheric pressure whereby the charge of compressed air acts as a pneumatic spring and said shell acts as a taut spring-loaded trampoline sheet thereby causing a ball impinging thereon to rebound and be driven a relatively great distance; B. a handle section; and C. a coupler joining the handle section to the striker section to complete the bat, said valve being formed by a rubber plug which is penetrable by a hypodermic needle to inject compressed air in said envelope, said shell being provided at a lower end with a half neck in which the valve is installed.
Claim 3
Dependent Claim 49 words
A bat as set forth in claim 1, wherein said handle section is provided with a complementary half neck at an upper end, the half neck of the striker section and the half neck of the handle section being clamped together by said coupler to form a full neck.
Claim 4
Dependent Claim 23 words
A bat as set forth in claim 2, wherein said coupler is formed by a pair of arcuate pieces which are fastened together.
Claim 5
Dependent Claim 24 words
A bat as set forth in claim 3, in which the coupler is provided with a port to provide access to said valve plug.

References Cited (Backward Citations)

JPS5237126A Cited
GB2146538A Cited
US4917382A Cited
US5150897A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2001-10-26 2002-04-27 2002-10-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2005-10-26 2006-04-27 2006-10-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2009-10-26 2010-04-27 2010-10-27 $7700.00 Window Closed / Lapsed

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