Patent US4506887A successfully refreshed from Google Patents.
US4506887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Racket frame comprised of a single continuous filament and resin
Assignee: Individual
•
Filing: 1981-08-24
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Granted: 1985-03-26
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Expires: 2001-08-24
Abstract
Abstract The basic racket frame is comprised of an oval head, a yoke merging into a throat and a solid or a hollow shaft which is formed from a single length of collimated filaments preferably graphite fibers, known as a roving impregnated with a thermosetting resin. To form the racket frame, the single length of roving is wound up the handle, around the entire circumference of the head and back down the handle. This winding technique forms a hollow handle to which is attached a hollow, removably interfitting grip portion. This grip portion is then fitted with a cover consisting of stretchable, cylindric bands. The racket frame also includes a throat piece comprised of a plastic insert covered on opposite faces by a mat of filaments. The filaments in this mat are positioned parallel to the filaments in the handle.
Inventors
- 👤 Stanley Trysinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:43
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/10; A63B2209/00; A63B2209/02; A63B2209/023; A63B2209/026; A63B60/00; A63B60/06; A63B60/08; A63B60/10; Y; Y10; Y10S; Y10S273/00; Y10S273/23
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A racket frame comprising comprising a handle portion, a throat portion and a head, said handle portion, throat portion and head being integral and consisting essentially of thermosetting resin means reinforced with a single continuous filament means disposed in a plurality of windings which are arranged parallel to each other under tension and which extend along said handle portion, around the entire circumference of the head and back along said handle portion to define a hollow handle, said single continuous filament means having two ends secured together and including a throat piece comprised of a rigid plastic insert surrounded completely on each side by said continuous filament means with the opposed faces covered by a mat of filaments disposed substantially parallel to the filament means defining said handle.
Claim 2
Dependent Claim
128 words
A racket frame comprising comprising a handle portion, a throat portion and a head, said handle portion, throat portion and head being integral and consisting essentially of thermosetting resin means reinforced with a single continuous filament means disposed in a plurality of windings which are arranged parallel to each other under tension and which extend along said handle portion, around the entire circumference of the head and back along said handle portion to define a hollow handle, said single continuous filament means having two ends secured together and including a throat piece comprised of a rigid plastic insert surrounded completely on each side by said continuous filament means with the opposed faces covered by a mat of filaments disposed substantially parallel to the filament means defining said handle.
Claim 3
Dependent Claim
40 words
A racket frame as set forth in claim 1 further comprising a hollow cylindric one, piece handle grip of plastic material, means detachably connecting said handle grip to said hollow handle and cover means detachably connected to said handle grip.
Claim 4
Dependent Claim
36 words
A racket frame as set forth in claim 2 wherein said cover means is comprised of a plurality of stretchable cylindrical bands mounted on said handle grip in abutting relation and elastically gripping said handle grip.
Claim 5
Dependent Claim
85 words
A racket frame as set forth in claim 1 further comprising a string receiving groove extending substantially about the entire circumference of said head, recesses located in the outer circumference of said head along opposite sides of said groove, a flexible band having a U-shaped cross-sectional configuration substantially complementary to the outer surface of said head located in said recesses over said groove and extending about substantially the entire circumference of said head and means detachably securing the opposite ends of said band to head.
Claim 6
Dependent Claim
27 words
A racket frame as set forth in claim 4 further comprising at least one elongated weight strip located in said groove and maintained therein by said band.
Claim 7
Dependent Claim
48 words
A racket frame as set forth in claim 5, further comprising additional weight strips disposed in said groove each of which is corrugated transversely of the length thereof whereby said weight strips may be overlapped to any desirable degree and held against relative lengthwise movement by said corrugations.
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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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |