US4183526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis training device
Assignee: Individual
•
Filing: 1978-01-10
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Granted: 1980-01-15
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Expires: 1998-01-10
Abstract
Abstract A tennis training device is provided which has a head portion comprising a lightweight plastic foam material, a handle member and a grip affixed to the handle. The overall weight of the tennis training device is distributed so as to simulate the balance of a conventional tennis racket. The grip includes finger placement guides so oriented as to train the player in the eastern forehand type of grip. The air resistance of the head when swinging the tennis racket forces the player to utilize shoulder action in his swing thereby conditioning the player in proper tennis form with an objective of minimizing one of the contributing causes of "tennis elbow." When used in conjunction with a lightweight spongy game ball, the tennis training device is particularly suited for indoor use. Additionally, a retaining device is provided attachable to the handle of the tennis trainer and adapted to receive a companion game ball.
Inventors
- 👤 Donald K. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:45
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/38; A63B59/00; A63B59/80; A63B60/00; A63B60/06; A63B60/08; A63B60/10; A63B60/12; A63B60/52; Y; Y10; Y10S; Y10S273/00; Y10S273/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
208 words
A tennis training device for use with a ball made of soft plastic foam, the combination comrpising; a head member of relatively low density rigid plastic foam material having oppositely facing substantially imperforate ball engaging surfaces spaced apart in substantially parallel relation to each other and being of a size and shape substantially identical to that of a conventional stringed tennis racket, said head member being substantially imperforate, and a handle member of a relatively higher density material than said head member, said ball engaging surfaces being spaced apart a distance greater than the largest cross sectional dimension of said handle member, said handle member being attached to said head member in the space between and parallel to said ball engaging surfaces, said head and handle members having weights substantially equal to each other and providing a balance substantially the same as that of a conventional stringed tennis racket and a total weight substantially less than the weight of a conventional tennis racket, said substantially imperforate surfaces causing air resistance during swinging of said device simulating the swing of a conventional stringed tennis racket and thereby encouraging the use of a greater amount of shoulder action and less wrist action than with a heavier conventional stringed tennis racket.
Claim 2
Dependent Claim
208 words
A tennis training device for use with a ball made of soft plastic foam, the combination comrpising; a head member of relatively low density rigid plastic foam material having oppositely facing substantially imperforate ball engaging surfaces spaced apart in substantially parallel relation to each other and being of a size and shape substantially identical to that of a conventional stringed tennis racket, said head member being substantially imperforate, and a handle member of a relatively higher density material than said head member, said ball engaging surfaces being spaced apart a distance greater than the largest cross sectional dimension of said handle member, said handle member being attached to said head member in the space between and parallel to said ball engaging surfaces, said head and handle members having weights substantially equal to each other and providing a balance substantially the same as that of a conventional stringed tennis racket and a total weight substantially less than the weight of a conventional tennis racket, said substantially imperforate surfaces causing air resistance during swinging of said device simulating the swing of a conventional stringed tennis racket and thereby encouraging the use of a greater amount of shoulder action and less wrist action than with a heavier conventional stringed tennis racket.
Claim 3
Dependent Claim
40 words
The combination of claim 1 wherein said handle member has a grip portion, said grip portion including finger placement guides projecting from said grip portion and disposed in a plane parallel to the ball engaging surfaces of said training device.
Claim 4
Dependent Claim
31 words
The combination of claim 1 and further comprising a retaining clip detachably attached to said handle member and adapted to detachably receive and retain a ball relative to said handle member.
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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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |