Patent US5178387A successfully refreshed from Google Patents.
US5178387A
Expired / Lapsed
US
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Racket for ball games, in particular a tennis racket
Assignee: Individual
•
Filing: 1991-04-05
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Granted: 1993-01-12
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Expires: 2011-04-05
Abstract
Abstract A racket for ball games, in particular a tennis racket, comprising stringing provided in a stringing frame comprising a profile bar, a throat region adjoining the stringing and a handle (20) on a racket shaft on the longitudinal axis of the racket, which preferably forms a straight line of symmetry, is improved in regard to so-called impact shock in that the racket, between the throat region and the end of the handle (20), has a hinge location (44) whose hinge axis extends parallel to the stringing. The hinge location (44) is preferably disposed in the region of the handle (20) and is formed by a limb portion of the handle (20) which is preferably defined on both sides by groove-like channels (40) and is filled by an elastic shaped mass (42).
Inventors
- 👤 Siegfried Kuebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:55
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/08; A63B60/00; A63B60/54
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
133 words
A racket for ball games, in particular a tennis racket, comprising: a stringing frame including a shaped bar; stringing in the stringing frame; a throat region adjacent the stringing frame; a racket shaft and handle depending from the throat region, said handle having a handle end face defining a free end of the racket, and an intermediate limb portion on at least one of the handle and racket shaft; and a hinge location between the throat region and handle end, said hinge location having a hinge axis which extends parallel to the stringing, wherein the hinge location is formed by the intermediate limb portion and wherein said intermediate limb portion is delimited at least at one side thereof by a groove, wherein the hinge location is disposed in the region of the handle.
Claim 2
Dependent Claim
133 words
A racket for ball games, in particular a tennis racket, comprising: a stringing frame including a shaped bar; stringing in the stringing frame; a throat region adjacent the stringing frame; a racket shaft and handle depending from the throat region, said handle having a handle end face defining a free end of the racket, and an intermediate limb portion on at least one of the handle and racket shaft; and a hinge location between the throat region and handle end, said hinge location having a hinge axis which extends parallel to the stringing, wherein the hinge location is formed by the intermediate limb portion and wherein said intermediate limb portion is delimited at least at one side thereof by a groove, wherein the hinge location is disposed in the region of the handle.
Claim 3
Dependent Claim
19 words
A racket according to claim 1 wherein the limb portion is delimited on two sides thereof by a groove.
Claim 4
Dependent Claim
20 words
A racket according to claim 1 wherein said racket has a longitudinal axis which forms a straight line of symmetry.
Claim 5
Dependent Claim
27 words
A racket according to claim 3 wherein the width of the groove-like channel as measured on the longitudinal axis of the racket is up to 100 mm.
Claim 6
Dependent Claim
21 words
A racket according to claim 4 wherein the thickness of the limb portion approximately corresponds to the depth of the groove.
Claim 7
Dependent Claim
25 words
A racket according to claim 4 wherein the thickness of the handle corresponds to between 4 and 10 times the thickness of the limb portion.
Claim 8
Dependent Claim
25 words
A racket according to claim 6 wherein the thickness of the handle corresponds to between 5 and 8 times the thickness of the limb portion.
Claim 9
Dependent Claim
26 words
A racket according to claim 1 wherein the hinge axis is disposed at a spacing of from 60 mm to 220 mm from the handle end.
Claim 10
Dependent Claim
16 words
A racket according to claim 1 wherein the groove-like channel is filled by a shaped mass.
Claim 11
Dependent Claim
64 words
A racket according to claim 1 wherein flexing of the racket under the action of a force which acts at a spacing of about 400 mm from the hinge axis towards the stringing is between 1.2 and 9 times as great as the flexing of a hinge-less racket which otherwise corresponds thereto when fixedly clamped at the handle as far as the hinge axis.
Claim 12
Dependent Claim
128 words
A racket for ball games, in particular a tennis racket, comprising: a stringing frame including a shaped bar; stringing in the stringing frame; a throat region adjacent the stringing frame; a racket shaft and handle depending from the throat region, said handle having a handle end face defining a free end of the racket, and an intermediate limb portion on at least one of the handle and racket shaft; and a hinge location between the throat region and handle end, said hinge location having a hinge axis which extends parallel too the stringing, wherein the hinge location is formed by the intermediate limb portion and wherein said intermediate limb portion is delimited at least at one side thereof by a groove, including a plurality of said hinge locations.
Claim 13
Dependent Claim
128 words
A racket for ball games, in particular a tennis racket, comprising: a stringing frame including a shaped bar; stringing in the stringing frame; a throat region adjacent the stringing frame; a racket shaft and handle depending from the throat region, said handle having a handle end face defining a free end of the racket, and an intermediate limb portion on at least one of the handle and racket shaft; and a hinge location between the throat region and handle end, said hinge location having a hinge axis which extends parallel too the stringing, wherein the hinge location is formed by the intermediate limb portion and wherein said intermediate limb portion is delimited at least at one side thereof by a groove, including a plurality of said hinge locations.
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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) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |