US4029317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Games racket
Assignee: Individual
•
Filing: 1975-09-05
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Granted: 1977-06-14
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Expires: 1995-09-05
Abstract
Abstract A tennis racket and a method of manufacturing same are disclosed. The racket comprises two half-frame members each provided with a respective generally annular portion defining a rim element of the racket, and also provided with a handle portion connected to the respective generally annular portion. The face of the racket is formed by a plurality of tensioned strings clamped between the annular portions to define a netting. The netting is secured to each of the rim elements of the respective half-frame members by binders, which also secure the two rim elements to one another. The strings are subjected to tension by a tensioning device before the two rim elements of the racket are pressed together to clamp the strings therebetween and the strings are secured to the rim elements and the latter to one another by binders, which have been applied to at least the mutually facing surface portions of the rim elements prior to their being pressed together.
Inventors
- 👤 Sven Erik Malmstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:31
CPC Classifications
A; A63; A63B; A63B51/00; A63B51/01; A63B49/00; A63B49/02; A63B49/08; A63B51/14; A63B60/00; A63B60/06; A63B60/22; A63B60/30; A63B2049/0205; A63B60/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A method of manufacturing a games racket comprising the step of providing two, substantially mating, half-frame members having open rim portions; providing a plurality of individual substantially coplanar uncoated strings of a non-metallic material selected from the group consisting of natural and synthetic fibers; conjointly applying tension to all of the coplanar uncoated strings; while the strings are conjointly tensioned, pressing the strings between the two substantially mating open rim portions of the respective substantially mating half-frame members; and applying a bonding agent to inseparably bond the conjointly tensioned uncoated strings to both said open rim portions and the two open rim portions to each other.
Claim 2
Independent Claim
106 words
A method of manufacturing a games racket comprising the step of providing two, substantially mating, half-frame members having open rim portions; providing a plurality of individual substantially coplanar uncoated strings of a non-metallic material selected from the group consisting of natural and synthetic fibers; conjointly applying tension to all of the coplanar uncoated strings; while the strings are conjointly tensioned, pressing the strings between the two substantially mating open rim portions of the respective substantially mating half-frame members; and applying a bonding agent to inseparably bond the conjointly tensioned uncoated strings to both said open rim portions and the two open rim portions to each other.
Claim 3
Dependent Claim
29 words
A method of manufacturing a games racket, as claimed in claim 1, including the step of, simultaneously with the binding operation, fully coating the strings with the bonding agent.
Claim 4
Dependent Claim
86 words
A games racket comprising two individual substantially mating frame members each provided with a respective open rim portion and with a respective handle part connected to the associated open rim portion; a plurality of initially uncoated individual strings, of a non-metallic material selected from the group consisting of natural and synthetic fibers crossed to define a netting, fixed between said open rim portions while said strings are conjointly tensioned, and a bonding agent securing said two open rim portions to each other and to said netting.
Claim 5
Dependent Claim
86 words
A games racket comprising two individual substantially mating frame members each provided with a respective open rim portion and with a respective handle part connected to the associated open rim portion; a plurality of initially uncoated individual strings, of a non-metallic material selected from the group consisting of natural and synthetic fibers crossed to define a netting, fixed between said open rim portions while said strings are conjointly tensioned, and a bonding agent securing said two open rim portions to each other and to said netting.
Claim 6
Dependent Claim
150 words
A games racket comprising two individual substantially mating frame members each provided with a respective open rim portion and with a respective handle part connected to the associated open rim portion; a plurality of initially uncoated individual strings, of a non-metallic material selected from the group consisting of natural and synthetic fibers crossed to define a netting, fixed between said open rim portions while said strings are conjointly tensioned; a bonding agent securing said two open rim portions to each other and to said netting; said racket frame members being bonded to each other and to said strings along substantially only said open rim portions and being free of each other along at least predetermined longitudinally extending portions of said handle parts to define a gap extending parallel to the plane of said netting; and at least one spacer element engaged between said longitudinally extending portions of said handle parts.
Claim 7
Dependent Claim
150 words
A games racket comprising two individual substantially mating frame members each provided with a respective open rim portion and with a respective handle part connected to the associated open rim portion; a plurality of initially uncoated individual strings, of a non-metallic material selected from the group consisting of natural and synthetic fibers crossed to define a netting, fixed between said open rim portions while said strings are conjointly tensioned; a bonding agent securing said two open rim portions to each other and to said netting; said racket frame members being bonded to each other and to said strings along substantially only said open rim portions and being free of each other along at least predetermined longitudinally extending portions of said handle parts to define a gap extending parallel to the plane of said netting; and at least one spacer element engaged between said longitudinally extending portions of said handle parts.
Claim 8
Dependent Claim
60 words
A racket as defined in claim 4, including adjustable spacer means engaged between said longitudinally extending portions of said handle part adjacent the outer free ends thereof to vary the width of said gap between said longitudinally extending portions of said handle parts to set the thickness and the spreading angle of the hand grip, as desired, within predetermined limits.
Claim 9
Dependent Claim
54 words
A racket as defined in claim 6, wherein said adjustable spacer means comprises an elongate member provided with respective threaded portions at opposite ends thereof, each threaded portion co-operating with a correspondingly threaded bore in a respective one of said handle parts, said threaded portions of said elongate member being threaded in opposite senses.
References Cited (Backward Citations)
CA873489A
Cited
GB190902717A
Cited
US1587918A
Cited
US1862581A
Cited
GB331925A
Cited
US1954327A
Cited
US2307470A
Cited
DE1043897B
Cited
US3834699A
Cited
US3833219A
Cited
US3810620A
Cited
US3833218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |