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US3724850A Expired / Lapsed US ⏱️ 0.0 years remaining

Racket with string tension adjusting means

Assignee: Individual
•
Filing: 1971-04-12
•
Granted: 1973-04-03
•
Expires: 1991-04-12
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Abstract

Abstract An improved game racket is provided, for tennis and other games, which incorporates means for adjusting the strings of the racket so that they may always be maintained at proper tension when the racket is in use, thereby obviating the need for repeated restringing of the racket. When the racket is not in use, the tension may be relaxed. The embodiment of the invention to be described includes a tubular frame, and a cable extending around the outer periphery of the frame. A plurality of hooks are attached to the cable, and the racket is strung so that the strings extend around the cables and beneath the hooks. The cable enters the interior of the frame at the base of the racket head and the ends of the cable extend down through the neck of the racket frame to the base of the handle. The cable ends are attached to either side of a bolt which extends through a metal plate and which is threaded through a nut. Adjustment of the nut provides the desired string tautness to the racket.

Inventors

  • 👤 R Stevens

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 05:46
CPC Classifications
A; A63; A63B; A63B51/00; A63B51/12; A63B60/00; A63B60/50

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 89 words
A game racket including: an annular frame with string holes formed therein; a cable extending around the periphery of said frame; a plurality of hooks affixed to said cable and aligned with said string holes; racket stringing means looped through said string holes and around said cable to be engaged by said hooks; and tension adjusting means for said cable for producing accurate movement of said cable with respect to the perimeter of said frame so as to cause said hooks to control the tension of said stringing means.
Claim 2
Dependent Claim 89 words
A game racket including: an annular frame with string holes formed therein; a cable extending around the periphery of said frame; a plurality of hooks affixed to said cable and aligned with said string holes; racket stringing means looped through said string holes and around said cable to be engaged by said hooks; and tension adjusting means for said cable for producing accurate movement of said cable with respect to the perimeter of said frame so as to cause said hooks to control the tension of said stringing means.
Claim 3
Dependent Claim 37 words
The racket defined in claim 1, in which said frame is composed of tubular metal, and in which said frame is configured to define a channel for said cable extending around the outer periphery of said frame.
Claim 4
Dependent Claim 33 words
The racket defined in claim 1, and which includes a generally hollow handle affixed to said frame, and in which the ends of said cable extend down into the bore of said handle.
Claim 5
Dependent Claim 23 words
The racket defined in claim 3, in which said adjusting means is positioned in said handle and engages the ends of said cable.
Claim 6
Dependent Claim 46 words
The racket defined in claim 4, in which said adjusting means includes a bolt attached to the ends of said cable and supported for longitudinal non-rotational movement within said handle, and which includes a nut threaded to said bolt for producing the aforesaid longitudinal movement thereof.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-02 1976-10-02 1977-04-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-02 1980-10-02 1981-04-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-02 1984-10-02 1985-04-03 $7700.00 Window Closed / Lapsed

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