US3734499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Racket with resilient surface
Assignee: Individual
•
Filing: 1971-12-28
•
Granted: 1973-05-22
•
Expires: 1991-12-28
Abstract
Abstract A game racket, such as a tennis racket, in which the game ball contact surface is a resilient membrane such as plastic film. The membrane is tensioned in several directions at once by spindles on the edge of the racket head, the spindles being connected by bevel gears and rotated by a ratchet wheel and pawl.
Inventors
- 👤 F Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:30
CPC Classifications
A; A63; A63B; A63B49/00; A63B59/00; A63B59/80; A63B51/00; A63B51/02; A63B51/04; A63B51/12; Y; Y10; Y10S; Y10S273/00; Y10S273/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
In a racket, the combination of: a frame having a handle, said frame including a closed loop; a resilient membrane substantially filling the area within said loop; tensioning means for multidirectionally stretching and maintaining substantially uniform tension in said membrane, wherein said tensioning means includes a plurality of rods rotatably mounted on edges of said loop, said rods being adapted to draw edges of said membrane; gears connecting said rods for simultaneous rotation thereof; and means for rotating and locking said roDs when a predetermined tension on said membrane has been attained.
Claim 2
Dependent Claim
92 words
In a racket, the combination of: a frame having a handle, said frame including a closed loop; a resilient membrane substantially filling the area within said loop; tensioning means for multidirectionally stretching and maintaining substantially uniform tension in said membrane, wherein said tensioning means includes a plurality of rods rotatably mounted on edges of said loop, said rods being adapted to draw edges of said membrane; gears connecting said rods for simultaneous rotation thereof; and means for rotating and locking said roDs when a predetermined tension on said membrane has been attained.
Claim 3
Dependent Claim
40 words
A racket as in claim 1 wherein said tensioning means further includes a plurality of other rods fixedly mounted on edges of said loop opposite said rotatable rods, said other rods being adapted to anchor other edges of said membrane.
Claim 4
Dependent Claim
18 words
A racket as in claim 2 including a pair each of said rotatable rods and said fixed rods.
Claim 5
Dependent Claim
29 words
A racket as in claim 1 wherein said tensioning means further includes a ratchet wheel and pawl, said ratchet wheel having a slot therein for insertion of a turnkey.
Claim 6
Dependent Claim
27 words
A racket as in claim 1 wherein said membrane is a plastic film having a plurality of openings therethrough for lowering of wind resistance to said film.
Claim 7
Dependent Claim
25 words
A racket as in claim 1 wherein said membrane is a plastic film having an embossed surface for increased frictional contact with a game ball.
References Cited (Backward Citations)
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Cited
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Cited
FR1573987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |