Patent US3845953A successfully refreshed from Google Patents.
US3845953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis serve training device
Assignee: Individual
•
Filing: 1972-09-28
•
Granted: 1974-11-05
•
Expires: 1992-09-28
Abstract
Abstract A tennis serve training device is provided comprising a flexible sack or container for holding one or more tennis balls closed by an elongated longitudinal zipper. The container is swung by a tether attached at one end. The construction herein for closure of the container avoids the opening of such closure due to centrifugal forces in the course of using the device. A handle grip of relatively rigid material for the tether is provided for simulating the handle grip portion of a tennis racquet handle.
Inventors
- 👤 F Malhas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:58
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/38; A63B69/385
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
A tennis serve training device comprising an elongated closed end hollow container transversely dimensioned for holding only a single row of alined tennis balls to effect a predetermined weight, a single tether secured to an end of said container extending axially thereof for swinging said weighted container in an arc to simulate the movement of a tennis racquet in a serving movement wherein centrifugal force effects a longitudinal tension in said container; said container having a longitudinal side opening for inserting and removing tennis balls and a closure means for said opening extending longitudinally therealong to retain tennis balls in said container and being thus disposed to preclude tension due to centrifugal force from acting in a direction tending to open said closure means.
Claim 2
Dependent Claim
124 words
A tennis serve training device comprising an elongated closed end hollow container transversely dimensioned for holding only a single row of alined tennis balls to effect a predetermined weight, a single tether secured to an end of said container extending axially thereof for swinging said weighted container in an arc to simulate the movement of a tennis racquet in a serving movement wherein centrifugal force effects a longitudinal tension in said container; said container having a longitudinal side opening for inserting and removing tennis balls and a closure means for said opening extending longitudinally therealong to retain tennis balls in said container and being thus disposed to preclude tension due to centrifugal force from acting in a direction tending to open said closure means.
Claim 3
Dependent Claim
21 words
A device as set forth in claim 1, said container being of flexible material and said closure means being a zipper.
Claim 4
Dependent Claim
37 words
A device as set forth in claim 1, including at least one additional identical device, and a grip handle having passage meaNs for receiving and securing said tethers and simulating a portion of a tennis racquet handle.
Claim 5
Dependent Claim
34 words
A device as set forth in claim 3, said handle grip having means to secure said tethers at a selected distance from said containers to effect a simulated tennis racquet handle of selected length.
Claim 6
Dependent Claim
31 words
A tennis serve training device, as set forth in claim 1, and a handle grip to which said tether is secured and simulating the handle grip portion of a tennis racquet.
Claim 7
Dependent Claim
29 words
A device as set forth in claim 5, and adjusting means to secure said tether at predetermined distances from said container to simulate tennis racquet handles of selective length.
Claim 8
Dependent Claim
31 words
A device as set forth in claim 5, said handle grip being tubular, said tether passing therethrough at one end and having a wrist loop extending therefrom at the other end.
Claim 9
Dependent Claim
52 words
A device as set forth in claim 5, and adjusting means to secure said tether at predetermined distances from said container to simulate tennis racquet handles of selective length, said handle grip being tubular, said tether passing therethrough at one end and having a wrist loop extending therefrom at the other end.
Claim 10
Dependent Claim
35 words
A device as set forth in claim 8, including at least one additional identical device having the tether thereof passing through said handle grip and having a wrist loop adjacent said first mentioned wrist loop.
References Cited (Backward Citations)
FR839658A
Cited
US2197977A
Cited
US2311160A
Cited
US2631629A
Cited
US2717015A
Cited
US3143153A
Cited
US3266464A
Cited
US3653660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |