US3633910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racket handle having longitudinal displacement
Assignee: Individual
•
Filing: 1970-03-09
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Granted: 1972-01-11
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Expires: 1990-03-09
Abstract
Abstract The invention refers to tennis rackets in which the frame is formed of two superposed tubes or rods bent to the desired shape, each comprising a pair of rectilinear parallel extensions, the two superposed pairs forming the handle portion of the frame. According to the invention the superposed pairs are connected with each other by means permitting a slight longitudinal respective displacement of a pair with respect to the other when the handle portion flexes in use. In an embodiment the pairs are connected by stays having four perforations for passage of the extensions, these stays being alternately welded to one and to the other pair. In another embodiment the stays are welded to both pairs, but they are somewhat resiliently deformable.
Inventors
- 👤 Rene Spenle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/12; A63B49/08; A63B60/00; A63B60/52; A63B60/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
In a tennis racket having a frame formed of a pair of like symmetrical superposed metallic tubes curved to the profile required for the stringing of the racket, each having a pair of rectilinear extensions substantially parallel to each other and to the pair of extensions of the other tube, said frame further comprising first means to assemble with each other the extensions of each pair, and second means to assemble said pairs with each other, so as to constitute for said frame a resilient handle portion having a zone which flexes when the racket strikes a ball: the improvement wherein said second means retains said pairs of extensions with respect to each other in a transverse direction but permits a limited degree of relative movement in the longitudinal direction in the said zone of said handle portion, said second means comprising transverse stays each rigidly secured to the extensions of one of said pairs and having perforations through which the extensions of the other one of said pairs are slidably passed.
Claim 2
Dependent Claim
172 words
In a tennis racket having a frame formed of a pair of like symmetrical superposed metallic tubes curved to the profile required for the stringing of the racket, each having a pair of rectilinear extensions substantially parallel to each other and to the pair of extensions of the other tube, said frame further comprising first means to assemble with each other the extensions of each pair, and second means to assemble said pairs with each other, so as to constitute for said frame a resilient handle portion having a zone which flexes when the racket strikes a ball: the improvement wherein said second means retains said pairs of extensions with respect to each other in a transverse direction but permits a limited degree of relative movement in the longitudinal direction in the said zone of said handle portion, said second means comprising transverse stays each rigidly secured to the extensions of one of said pairs and having perforations through which the extensions of the other one of said pairs are slidably passed.
Claim 3
Dependent Claim
49 words
In a tennis racket as claimed in claim 1, each of said transverse stays being in the form of a substantially rigid plate having four perforations for passage of the extensions of both of said pairs, and the extensions of one of said pairs being welded to said plate.
Claim 4
Dependent Claim
37 words
In a tennis racket as claimed in claim 1, said transverse stays being alternately secured to the extensions of one and of the other of said pairs along the length of said zone of said handle portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |