US5129656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Racquet, in particular a tennis racquet
Assignee: Head Sport GmbH
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Filing: 1991-07-26
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Granted: 1992-07-14
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Expires: 2011-07-26
Abstract
Abstract In a racquet, in particular, a tennis racquet, which incorporates a frame, an open or closed heart piece, and a shaft (2) that is joined to the heart piece, with the frame, heart piece and shaft being formed in one piece or connected releasably to each other, the grip (1) that is formed as a one-piece sleeve can be slid onto the shaft. The inside profile of the cross section of the grip (1) and the outside profile of the cross section of the shaft (2) incorporate longitudinal shape-locking and interacting supporting surfaces. The spacing between the supporting surfaces on the shaft (2) and the supporting surfaces of the grip (1) tapers in a wedge shape towards the unattached end (11) of the shaft (2). A removable distance piece (3) that prevents the grip (1) being slid axially into the mated position is releasably connected to the end (11) of the shaft. With the distance piece (3) installed on the shaft, the racquet can be tested with various grips (1). After removal of the distance piece (3) the grip is slid completely onto the shaft (2) and is then joined to the shaft so that, for all practical purposes, it cannot be released from the shaft.
Inventors
- 👤 Robert Marte
- 👤 Helmut Umlauft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:41
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/08; A63B49/035; A63B60/00; A63B60/06; A63B60/22; A63B60/28; A63B60/08; A63B60/10; A63B60/30; A63B60/52
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
235 words
A racquet comprising a frame; and open or closed heart piece; the frame, heart piece and shaft being manufactured as one piece or being connected to each other so as to be fixed; and a grip that is formed as a one-piece sleeve that can be slid onto the shaft and secured thereon when in the fully installed mated position, the inside profile of the cross section of the grip and the outside profile of the cross section of the shaft incorporating supporting surfaces that are a shape-locking fit with each other and extend longitudinally over at least part of the length of the shaft, by means of which the grip is secured on the shaft in such a manner that it cannot rotate independently of said shaft, and wherein, on the one hand, the supporting surfaces of the shaft and, on the other hand, the supporting surfaces of the grip converge in a wedge shape at least over a part of the length of the grip in the direction of the unattached end of the shaft and the supporting surfaces of the grip are parallel to the wedge surfaces of the shaft that work in conjunction with them; and wherein between the shaft and the grip there is a distance piece which is removable and which limits the axial installation movement of the grip and complete installation of the grip in the mated position.
Claim 2
Dependent Claim
235 words
A racquet comprising a frame; and open or closed heart piece; the frame, heart piece and shaft being manufactured as one piece or being connected to each other so as to be fixed; and a grip that is formed as a one-piece sleeve that can be slid onto the shaft and secured thereon when in the fully installed mated position, the inside profile of the cross section of the grip and the outside profile of the cross section of the shaft incorporating supporting surfaces that are a shape-locking fit with each other and extend longitudinally over at least part of the length of the shaft, by means of which the grip is secured on the shaft in such a manner that it cannot rotate independently of said shaft, and wherein, on the one hand, the supporting surfaces of the shaft and, on the other hand, the supporting surfaces of the grip converge in a wedge shape at least over a part of the length of the grip in the direction of the unattached end of the shaft and the supporting surfaces of the grip are parallel to the wedge surfaces of the shaft that work in conjunction with them; and wherein between the shaft and the grip there is a distance piece which is removable and which limits the axial installation movement of the grip and complete installation of the grip in the mated position.
Claim 3
Dependent Claim
24 words
A racquet as defined in claim 1, wherein the distance piece is connected to the shaft or the grip so as to be releasable.
Claim 4
Dependent Claim
31 words
A racquet as defined in claim 1, wherein the distance piece is releasably connected to the unattached end of the shaft and is supportable against a stop surface of the grip.
Claim 5
Dependent Claim
29 words
A racquet as defined in claim 1, wherein the distance piece (3) is connected to the unattached end of the shaft (2) through a nominal break cross section (14).
Claim 6
Dependent Claim
30 words
A racquet as defined in claim 1 wherein the distance piece is set onto the unattached end of the shaft or is plugged into the unattached end of the shaft.
Claim 7
Dependent Claim
43 words
A racquet as defined in claim 1 wherein the grip is connectable to the shaft so as to be unreleasable or releasable only with difficulty only after removal of the distance piece, by way of means for securing the grip and shaft together.
Claim 8
Dependent Claim
42 words
A racquet as defined in claim 1 wherein two, diametrically opposed lugs are formed on the inside surface of the grip and at least one groove is formed transversely to the axis on the shaft the grip consisting of elastically deformable material.
Claim 9
Dependent Claim
49 words
A racquet as defined in claim 7, wherein the lug and the groove are defined axially by defining surfaces that are transverse to the axis of the shaft and the spacing of the defining surfaces of the lug corresponding to the spacing of the defining surfaces of the groove.
Claim 10
Dependent Claim
44 words
A racquet as defined in claim 1, wherein the unattached end of the shaft is hollow, consists of elastically deformable material, and incorporates two, diametrically opposed lugs that snap into position behind a step that is formed on the inside surface of the grip.
Claim 11
Dependent Claim
60 words
A racquet as defined in claim 1, wherein within the grip there is a capsule or a bag that contains a quantity of adhesive and after removal of the distance piece when the grip is slid on into the mated position, this is destroyed by a blade or a pointed pin that is arranged on the end of the shaft.
Claim 12
Dependent Claim
21 words
A racquet as defined in claim 1, wherein the angle of taper that is subtended between the supporting surfaces is self-locking.
Claim 13
Dependent Claim
21 words
A racquet as defined in claim 1, wherein the angle of taper subtended between the supporting surfaces is at most 3°.
Claim 14
Dependent Claim
49 words
A racquet as defined in claim 1, the distance piece is so dimensioned that the installation path of the grip as far as the stop on the distance piece is at least 98%, of the total installation path into the mated position when the distance piece has been removed.
Claim 15
Dependent Claim
32 words
A racquet as recited in claim 13, wherein the distance piece is so dimensioned that the installation path of the grip as far as the stop on the distance piece is 99%.
Claim 16
Dependent Claim
24 words
A racquet as defined in claim 1, wherein the shaft and the hollow space within the space are of elliptical or octagonal cross section.
Claim 17
Dependent Claim
19 words
A racquet as recited in claim 1, wherein the angle of taper subtended between supporting surfaces is approximately 1°.
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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) | 1995-07-14 | 1996-01-13 | 1996-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-14 | 2000-01-13 | 2000-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-14 | 2004-01-13 | 2004-07-14 | $7700.00 | Window Closed / Lapsed |