US4131279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racket and stringing method
Assignee: Individual
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Filing: 1976-08-23
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Granted: 1978-12-26
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Expires: 1996-08-23
Abstract
Abstract A tennis racket and stringing method are disclosed wherein the resulting racket has a more uniform main string to cross string tensioning. The uniform tensioning provides a consistent playing surface throughout the entire stringed area. The center main strings are first tensioned and the remaining main strings are tensioned by working outwardly from the center strings toward the sides. The cross strings are interwoven with the main strings beginning from the center and working outwardly.
Inventors
- 👤 John M. Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:32
CPC Classifications
A; A63; A63B; A63B51/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A method of stringing a racket having an open frame and a handle, the steps comprising inserting and tensioning the main strings in the frame in a direction parallel to the handle, said strings being tensioned first at the center and then working outwardly toward the sides; and inserting and interweaving the cross strings through said main strings and beginning from the center and moving outwardly towards the top and bottom of the frame, said cross strings being tensioned first at the center and then outwardly.
Claim 2
Independent Claim
86 words
A method of stringing a racket having an open frame and a handle, the steps comprising inserting and tensioning the main strings in the frame in a direction parallel to the handle, said strings being tensioned first at the center and then working outwardly toward the sides; and inserting and interweaving the cross strings through said main strings and beginning from the center and moving outwardly towards the top and bottom of the frame, said cross strings being tensioned first at the center and then outwardly.
Claim 3
Dependent Claim
54 words
The method according to claim 1 including the step of tying off each end of said central portion cross string at the frame, and then inserting and tensioning additional cross strings, from said central portion cross string to the top and to the bottom, said additional cross strings being tied off at the frame.
Claim 4
Dependent Claim
102 words
A tennis racket comprising an open frame; said frame terminating in a handle; a plurality of main strings parallel to said handle and secured under tension in said frame; first central portion cross string inserted and tensioned in said frame at the center thereof and interwoven with said plurality of main strings; and additional cross string inserted in said frame and interwoven with said main strings, said additional cross strings being added from said first central portion cross string outwardly toward the top and bottom of said frame and said additional cross string being tensioned from said central portion cross string outwardly.
Claim 5
Dependent Claim
102 words
A tennis racket comprising an open frame; said frame terminating in a handle; a plurality of main strings parallel to said handle and secured under tension in said frame; first central portion cross string inserted and tensioned in said frame at the center thereof and interwoven with said plurality of main strings; and additional cross string inserted in said frame and interwoven with said main strings, said additional cross strings being added from said first central portion cross string outwardly toward the top and bottom of said frame and said additional cross string being tensioned from said central portion cross string outwardly.
Claim 6
Dependent Claim
79 words
A tennis racket comprising an open frame; said frame terminating in a handle; a plurality of main strings parallel to said handle and secured under tension in said frame, said strings being first tensioned at the center and then outwardly; a plurality of cross strings interwoven with said main strings and secured under tension in said frames; and said main strings and cross strings being secured under tension in said frame from the central portion and then outwardly therefrom.
Claim 7
Dependent Claim
79 words
A tennis racket comprising an open frame; said frame terminating in a handle; a plurality of main strings parallel to said handle and secured under tension in said frame, said strings being first tensioned at the center and then outwardly; a plurality of cross strings interwoven with said main strings and secured under tension in said frames; and said main strings and cross strings being secured under tension in said frame from the central portion and then outwardly therefrom.
References Cited (Backward Citations)
US1132214A
Cited
FR550985A
Cited
GB409924A
Cited
GB566130A
Cited
GB887526A
Cited
FR1444292A
Cited
US3834699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |