US4417730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis practice apparatus
Assignee: Individual
•
Filing: 1982-05-03
•
Granted: 1983-11-29
•
Expires: 2002-05-03
Abstract
Abstract Tennis practice apparatus movably positions a ball to be struck with a tennis racket while the ball is moving to improve a player's physical coordination and timing. The apparatus is portable to be used either indoors or outdoors and includes a pivoted arm carrying the ball controlled by resilient members to cause the arm and the ball to oscillate about a stationary position to permit the player to strike the ball as the ball is moving toward the player providing a natural feel.
Inventors
- 👤 Todd D. Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:01
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/0073; A63B69/0091
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
195 words
Apparatus for moving a ball to be struck by a racket for practice comprising elongate arm means having a mounting end and a target end carrying a ball to be struck by a racket; support means pivotally mounting said arm means at said mounting end to permit said target end to move through a stationary position in opposite directions and limiting pivotal movement of said arm means to less than 360°; and spring means connected at a first end with said arm means and at a second end with said support means at a position spaced from said mounting end of said arm means, said spring means being aligned along said arm means to bias said arm means toward said stationary position such that pivotal movement of said arm means in a first direction from said stationary position tensions said spring means to bias said arm means to move in a second direction opposite to said first direction whereby striking of said ball carried on said target end of said arm means with a racket causes said ball to oscillate about said stationary position for striking again with the racket while said ball is moving.
Claim 2
Dependent Claim
195 words
Apparatus for moving a ball to be struck by a racket for practice comprising elongate arm means having a mounting end and a target end carrying a ball to be struck by a racket; support means pivotally mounting said arm means at said mounting end to permit said target end to move through a stationary position in opposite directions and limiting pivotal movement of said arm means to less than 360°; and spring means connected at a first end with said arm means and at a second end with said support means at a position spaced from said mounting end of said arm means, said spring means being aligned along said arm means to bias said arm means toward said stationary position such that pivotal movement of said arm means in a first direction from said stationary position tensions said spring means to bias said arm means to move in a second direction opposite to said first direction whereby striking of said ball carried on said target end of said arm means with a racket causes said ball to oscillate about said stationary position for striking again with the racket while said ball is moving.
Claim 3
Dependent Claim
51 words
Apparatus as recited in claim 1 wherein said support means includes adjustment means permitting said spring means to be connected at various positions to adjust the spring bias on said arm means and the speed at which said arm means is moved toward said stationary position after striking of said ball.
Claim 4
Dependent Claim
90 words
Apparatus as recited in claim 2 wherein said adjustment means includes a pair of spaced plates extending on opposite sides of said arm means, a first plurality of openings arranged in a line along said plates for pivotally mounting said arm means, and a second plurality of openings arranged in a line along said plates to extend away from said line of first openings for connection with said spring means whereby tension on said spring means varies dependent upon which of said second openings is connected with said spring means.
Claim 5
Dependent Claim
23 words
Apparatus as recited in claim 3 wherein said spring means includes first and second springs extending along opposite sides of said arm means.
Claim 6
Dependent Claim
41 words
Apparatus as recited in claim 4 wherein said first and second springs are coiled tension springs and said adjustment means includes peg means for connecting the ends of said first and second springs with said second openings in said spaced plates.
Claim 7
Dependent Claim
23 words
Apparatus as recited in claim 5 wherein said support means includes clamp means supporting said spaced plates and adapted to grasp a ledge.
Claim 8
Dependent Claim
24 words
Apparatus as recited in claim 5 wherein said support means includes adjustable, telescoping column means supporting said spaced plates for vertically positioning said ball.
Claim 9
Dependent Claim
18 words
Apparatus as recited in claim 1 wherein said support means includes clamp means adapted to grasp a ledge.
Claim 10
Dependent Claim
24 words
Apparatus as recited in claim 1 wherein said support means includes adjustable, telescoping column means supporting said apparatus for vertical positioning of said ball.
Claim 11
Dependent Claim
37 words
Apparatus as recited in claim 9 wherein said column means includes a base having a plurality of horizontally extending feet, an upright telescoping column and a plurality of adjustable braces extending between said feet and said column.
References Cited (Backward Citations)
DE432639C
Cited
US1679174A
Cited
GB370590A
Cited
US2082818A
Cited
US2578313A
Cited
US2713487A
Cited
US3661679A
Cited
FR2232339A1
Cited
US3876203A
Cited
US4089521A
Cited
US4204678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |