US4374589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handle for tennis racket with anti-torsion grip portion
Assignee: Individual
•
Filing: 1980-02-25
•
Granted: 1983-02-22
•
Expires: 2000-02-25
Abstract
Abstract The grip portion of a tennis racket comprises a pair of flat surfaces disposed in parallel relationship relative to each other and relative to a flat plane containing the head of the racket. Each of the flat surfaces is subtended by an obtuse angle having its vertex at a geometric center of the grip portion. A pair of at least substantially arcuate surfaces are each subtended by an acute angle and intersect the flat surfaces to define four perceptible edges about the grip portion, with each of the arcuate surfaces being defined by a radius having its center at the geometric center of the grip portion and further having a length of about 0.75 inches.
Inventors
- 👤 Gordon E. Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:48
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/08; A63B60/00; A63B60/06; A63B60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
In a tennis racket having a head lying in a flat plane, and a handle having a grip portion attached to said head by a neck portion, said grip portion having a geometric center when viewed in cross section, the improvement wherein said grip portion comprises a pair of flat surfaces disposed in parallel relationship relative to each other and to said plane, each of said flat surfaces being subtended by an obtuse angle having its vertex at said geometric center, and a pair of at least substantially arcuate surfaces disposed transversely relative to said flat surfaces and said plane with each of said arcuate surfaces being subtended by an acute angle having its vertex at said geometric center and intersecting each of said flat surfaces to define a perceptible edge at the juncture thereof, each of said arcuate surfaces being defined by a radius having its center at said geometric center and having a length of about 0.75 inches.
Claim 2
Dependent Claim
160 words
In a tennis racket having a head lying in a flat plane, and a handle having a grip portion attached to said head by a neck portion, said grip portion having a geometric center when viewed in cross section, the improvement wherein said grip portion comprises a pair of flat surfaces disposed in parallel relationship relative to each other and to said plane, each of said flat surfaces being subtended by an obtuse angle having its vertex at said geometric center, and a pair of at least substantially arcuate surfaces disposed transversely relative to said flat surfaces and said plane with each of said arcuate surfaces being subtended by an acute angle having its vertex at said geometric center and intersecting each of said flat surfaces to define a perceptible edge at the juncture thereof, each of said arcuate surfaces being defined by a radius having its center at said geometric center and having a length of about 0.75 inches.
Claim 3
Dependent Claim
19 words
The racket of claim 1 wherein said obtuse angle is about 110° and said acute angle is about 70°.
Claim 4
Dependent Claim
37 words
The racket of claim 1 wherein each of said flat surfaces has a width approximately 1.25 inches and wherein the distance between said flat surfaces is about 0.9375 inches, when said handle is viewed in cross section.
Claim 5
Dependent Claim
22 words
The racket of claim 1 wherein the perimetric length of said grip portion is substantially about 4.5 inches throughout the length thereof.
References Cited (Backward Citations)
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GB389353A
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US2655963A
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US4072312A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |