US4325549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racket with selectively movable weight
Assignee: Individual
•
Filing: 1980-03-10
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Granted: 1982-04-20
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Expires: 2000-03-10
Abstract
Abstract A tennis racket is shown with a movable weight and a latching device for release of the weight which is moved by the swinging of the racket to bring the weight to or near the head of the racket. An alternate construction shows a ball-type weight in each of the two guideways disposed adjacent to the handle, throat and frame of the racket. A power swing moves the balls into a more-or-less outward position. The movable weight or force is relatively easy to retain and release at the disposal or consent and discretion of the user of the racket.
Inventors
- 👤 Joseph P. Vasselli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:45
CPC Classifications
A; A63; A63B; A63B49/00; A63B60/00; A63B60/02; A63B60/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
227 words
An improved tennis racket having a weight which is selectively movable toward and to the head of the racket to increase a force for driving and/or returning a ball, said tennis racket including: (a) a head portion including stretched strings supported and secured thereto; (b) a throat portion, adjacent said head portion, merging into a handle portion, said handle portion terminating in a handle; (c) a tubular passageway extending substantially centrally of said throat portion, said handle portion and said handle; (d) a weight located in said tubular passageway, said weight being normally freely slidable throughout said tubular passageway and with each end of said tubular passageway having a closure to limit the travel of said weight; (e) vent means operatively associated with said tubular passageway to prevent air cushioning and slowing of the movement of the weight in said tubular passageway; and (f) weight stop means located adjacent the upper end of said handle and being exposed on the outer surface of said handle portion for selective engagement by the racket user, said stop means being normally out of engagement with said weight so as to permit said weight to be freely slidable in said passageway, said stop means including means for engaging said weight within said passageway upon the user pressing inwardly on said stop means so as to temporarily restrict movement of said weight.
Claim 2
Dependent Claim
227 words
An improved tennis racket having a weight which is selectively movable toward and to the head of the racket to increase a force for driving and/or returning a ball, said tennis racket including: (a) a head portion including stretched strings supported and secured thereto; (b) a throat portion, adjacent said head portion, merging into a handle portion, said handle portion terminating in a handle; (c) a tubular passageway extending substantially centrally of said throat portion, said handle portion and said handle; (d) a weight located in said tubular passageway, said weight being normally freely slidable throughout said tubular passageway and with each end of said tubular passageway having a closure to limit the travel of said weight; (e) vent means operatively associated with said tubular passageway to prevent air cushioning and slowing of the movement of the weight in said tubular passageway; and (f) weight stop means located adjacent the upper end of said handle and being exposed on the outer surface of said handle portion for selective engagement by the racket user, said stop means being normally out of engagement with said weight so as to permit said weight to be freely slidable in said passageway, said stop means including means for engaging said weight within said passageway upon the user pressing inwardly on said stop means so as to temporarily restrict movement of said weight.
Claim 3
Dependent Claim
43 words
An improved tennis racket as in claim 1 in which the weight stop means is a button connected to an inwardly directed stem portion, said stem portion entering said passageway to engage the weight when the button is pressed inwardly against a bias.
Claim 4
Dependent Claim
24 words
An improved tennis racket as in claim 2 in which the bias for moving the button and stem portion outwardly is a compression spring.
References Cited (Backward Citations)
US1676270A
Cited
GB407983A
Cited
US2451217A
Cited
US3931968A
Cited
US4027879A
Cited
US3975018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |