US4180265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implement for striking a ball
Assignee: Fischer GmbH
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Filing: 1977-07-15
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Granted: 1979-12-25
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Expires: 1997-07-15
Abstract
Abstract This invention relates to means for suppressing vibration in implements which serve to strike the ball and comprise a striking surface, a hoop which encloses the striking surface, and a handle. The invention relates particularly to tennis rackets and aims at suppressing the high-frequency vibration which is excited by the impact of the ball. In these striking implements, at least two longitudinal or transverse strings or at least one longitudinal string and at least one transverse string are mechanically coupled to each other by a vibration absorber.
Inventors
- 👤 Adolf Staufer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:29
CPC Classifications
A; A63; A63B; A63B60/00; A63B60/54
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
An implement for striking a ball, comprising a handle, a head member connected to the handle and defining a hoop having sides, and a striking surface enclosed by said hoop and constituted by parallel longitudinal strings and parallel transverse strings, the longitudinal and transverse strings intersecting in a region spaced from the sides of the hoop, and preformed vibration-absorbing means insertable between two parallel strings for mechanically interlocking at least two of said parallel strings in a region between the intersecting strings and the sides of the hoop, the vibration absorbing means being spaced from the sides of the hoop.
Claim 2
Dependent Claim
100 words
An implement for striking a ball, comprising a handle, a head member connected to the handle and defining a hoop having sides, and a striking surface enclosed by said hoop and constituted by parallel longitudinal strings and parallel transverse strings, the longitudinal and transverse strings intersecting in a region spaced from the sides of the hoop, and preformed vibration-absorbing means insertable between two parallel strings for mechanically interlocking at least two of said parallel strings in a region between the intersecting strings and the sides of the hoop, the vibration absorbing means being spaced from the sides of the hoop.
Claim 3
Dependent Claim
26 words
An implement as set forth in claim 1, characterized in that at least tow longitudinal strings are mechanically interlocked to each other by said vibration-absorbing means.
Claim 4
Dependent Claim
26 words
An implement as set forth in claim 1, characterized in that at least two transverse strings are mechanically interlocked to each other by said vibration-absorbing means.
Claim 5
Dependent Claim
23 words
An implement as set forth in claim 1, characterized in that said vibration-absorbing means comprises an elastomeric material having viscoelastic inherent damping properties.
Claim 6
Dependent Claim
49 words
An implement as set forth in claim 1, characterised in that said vibration-absorbing means include means defining spaced openings adapted to have at least two strings threaded therethrough and the largest distance between said strings in said spaced openings is smaller than the normal distance between said two strings.
Claim 7
Dependent Claim
19 words
An implement as set forth in claim 1, characterized in that said vibration-absorbing means comprises a metallic spring element.
Claim 8
Dependent Claim
18 words
An implement as set forth in claim 1, characterized in that said vibration-absorbing means comprises an inelastic element.
Claim 9
Dependent Claim
25 words
An implement as set forth in claim 1, characterized in that said vibration-absorbing means comprises a spring element consisting of an inelastic elastomeric synthetic material.
Claim 10
Dependent Claim
23 words
An implement as set forth in claim 1, characterised in that less than five parallel strings are mechanically interlocked by said vibration-absorbing means.
Claim 11
Dependent Claim
32 words
An implement as set forth in claim 1, characterised in that said vibration-absorbing means comprises a plurality of separate, spaced-apart elements, each of said elements mechanically interlocking less than five parallel strings.
Claim 12
Dependent Claim
18 words
An implement as set forth in claim 10 wherein each of said elements mechanically interlocks two parallel strings.
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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) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |