US4077627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racket with detachable handle
Assignee: Individual
•
Filing: 1976-05-19
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Granted: 1978-03-07
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Expires: 1996-05-19
Abstract
Abstract A tennis racket of wood, composite materials or metal having a handle which is detachably held to the head of the racket by means of an elongated tension rod which extends therebetween and can apply sufficient force to maintain a pair of mating butt plates together during use of the racket. Release of the tension rod enables separation of the head and handle of the racket at the juncture of the butt plates.
Inventors
- 👤 Guy R. Cheatham
- 👤 Ralph W. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:54
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/035
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A racket having a head portion which includes a throat with a fastener abutment surface therein, a handle portion and means to detachably connect said head portion and said handle portions together, said means including: a first butt plate having an abutment surface connected to said head portion; a second butt plate having an abutment surface connected to said handle portion, said second butt plate abutment surface being positioned to face and abut said abutment surface of said first butt plate when said portions are connected; and means to force said abutment surfaces together including a tension rod which extends through at least part of said head and handle portions, said rod having a threaded portion and a head portion for the application of torque and to provide means to establish tension thereacross, abutment means to engage said rod head portion connected to said handle portion, and threaded attachment means connected to said head portion of said racket to engage said threaded portion of said rod, said threaded attachment means including a fastener which extends transversely across said throat to engage said fastener abutment surface over an area substantially larger than the surface area of the connected threaded portion of said rod.
Claim 2
Dependent Claim
202 words
A racket having a head portion which includes a throat with a fastener abutment surface therein, a handle portion and means to detachably connect said head portion and said handle portions together, said means including: a first butt plate having an abutment surface connected to said head portion; a second butt plate having an abutment surface connected to said handle portion, said second butt plate abutment surface being positioned to face and abut said abutment surface of said first butt plate when said portions are connected; and means to force said abutment surfaces together including a tension rod which extends through at least part of said head and handle portions, said rod having a threaded portion and a head portion for the application of torque and to provide means to establish tension thereacross, abutment means to engage said rod head portion connected to said handle portion, and threaded attachment means connected to said head portion of said racket to engage said threaded portion of said rod, said threaded attachment means including a fastener which extends transversely across said throat to engage said fastener abutment surface over an area substantially larger than the surface area of the connected threaded portion of said rod.
Claim 3
Dependent Claim
46 words
The racket defined in claim 1 wherein said rod is constructed from at least three pieces fixedly connected together including a threaded piece, a head piece and a hollow rod piece, portions of said head piece and said threaded piece extending into said hollow rod piece.
Claim 4
Dependent Claim
39 words
The racket defined in claim 1 wherein said first and second butt plates include torque transmission means which include at least three pins extending from one's abutment surface and mating holes defined by the other through its abutment surface.
Claim 5
Dependent Claim
75 words
The racket defined in claim 1 wherein said first and second butt plates each include a side opposite their abutment surfaces which has a central, planar portion to transfer longitudinal forces to said racket portions and a outer peripheral portion with an inner surface therealong which is noncircular in cross-section and is canted at an oblique angle to said planar portion to wedge said butt plates to their respective racket portions and to transmit torques.
Claim 6
Dependent Claim
50 words
The racket defined in claim 4 wherein said racket has a body portion with side surfaces where said butt plates are located, said butt plates including outer peripheral edges which extend from said peripheral portions to said abutment surfaces which are shaped to match said sides of said body portion.
References Cited (Backward Citations)
US1026990A
Cited
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US2463621A
Cited
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Cited
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Cited
US4007929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |