US4191372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis trainer device
Assignee: Individual
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Filing: 1978-03-24
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Granted: 1980-03-04
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Expires: 1998-03-24
Abstract
Abstract A tennis training device for releasably holding a tennis ball at any height appropriate for the practice of serves and ground strokes is disclosed. The apparatus comprises a base and standard for the support of a cross arm from which depends a cord attached by suitable means to a regular tennis ball. A mass member is attached to the cord at a distance above the ball in the described embodiment to prevent the wrapping of the cord about the cross arm when the ball is hit. The mass member is enclosed in an elongated member which is attached along its entire length to the cord, thus further minimizing cord wraps. The fastening means uses a hook material, Velcro or the like, as a means for lightly gripping the ball, but allowing it to release easily when hit so that the trajectory of the ball is not affected by the presence of the fastening means. The cross arm member is manufactured from a single aluminum tube and is angled downward toward its free end so that wraps of cord on the cross arm will tend to fall off. To practice serving, the tennis ball is positioned at a height of about nine feet. After the tennis ball is hit, the fastening means may also be left at a lowered position for the practice of ground strokes.
Inventors
- 👤 Dennis H. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/38; A63B69/0073; A63B69/0075; A63B71/00; A63B71/02; A63B71/023; A63B2071/026; A63B69/385; Y; Y10; Y10S; Y10S273/00; Y10S273/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
216 words
A sport training device to improve a player's ability to hit a ball comprising: a substantially vertical standard; a cross arm, one end connected to said standard in an elevated position; a cord, one end of said cord being suspended from the other end of said cross arm; fastening means attached to the other end of said cord and releasably attaching a ball to the other end of said cord a said ball being released upon impact of said ball by a striking implement; and a weight attached to said cord and spaced from said fastening means sufficiently such that blows to the said ball will not normally strike said weight, and whereby said weight tends to prevent the wrapping of said cord about said cross arm after impact of said ball by a striking implement; said weight constituting at least three/quarters of the combined weight of said length of cord suspended from said cross arm, said fastening means and said weight whereby, upon the striking of a ball attached to said fastening means, the length of cord between said weight and said fastening means after impact of said ball by a striking implement tend to describe an arcuate path with said weight remaining relatively stationary and preventing wrap-up of said cord about said cross arm.
Claim 2
Dependent Claim
216 words
A sport training device to improve a player's ability to hit a ball comprising: a substantially vertical standard; a cross arm, one end connected to said standard in an elevated position; a cord, one end of said cord being suspended from the other end of said cross arm; fastening means attached to the other end of said cord and releasably attaching a ball to the other end of said cord a said ball being released upon impact of said ball by a striking implement; and a weight attached to said cord and spaced from said fastening means sufficiently such that blows to the said ball will not normally strike said weight, and whereby said weight tends to prevent the wrapping of said cord about said cross arm after impact of said ball by a striking implement; said weight constituting at least three/quarters of the combined weight of said length of cord suspended from said cross arm, said fastening means and said weight whereby, upon the striking of a ball attached to said fastening means, the length of cord between said weight and said fastening means after impact of said ball by a striking implement tend to describe an arcuate path with said weight remaining relatively stationary and preventing wrap-up of said cord about said cross arm.
Claim 3
Dependent Claim
40 words
The apparatus of claim 1 wherein said cord is adjustably secured to said standard and extensible whereby the height at which said ball is held is varied by varying the length of cord between said weight and said cross arm.
Claim 4
Dependent Claim
51 words
The apparatus of claim 1 wherein said weight further comprises a stiffening member of significant length attached along a length of said cord for preventing the flexing of said cord at the line of attachment, thus minimizing the wrapping of said cord around said cross arm after the ball is hit.
Claim 5
Dependent Claim
185 words
A sport training device to improve a player's ability to hit a ball comprising: a substantially vertical standard; a cross arm, one end connected to the top of said standard and the other end thereof being free; a cord, one end supported from the free end of said cross arm, the other to a ball; a relatively rigid elongated weight means attached along and intermediate the ends of said cord and having a weight substantially greater than the suspended portion of said cord, a substantial length of said cord including said relatively rigid weight mean will resist winding up about said cross arm upon impact of a said ball by a striking implement; wherein said cross arm comprises a single bar member, a portion thereof closer to said free end being angled downwards to allow loops of cord which may become wrapped around said cross arm to drop off after a said ball is hit by a striking implement; and wherein said weight means has a weight of at least three-fourths of the combined weight of said card, said attachment means and said weight means.
Claim 6
Dependent Claim
185 words
A sport training device to improve a player's ability to hit a ball comprising: a substantially vertical standard; a cross arm, one end connected to the top of said standard and the other end thereof being free; a cord, one end supported from the free end of said cross arm, the other to a ball; a relatively rigid elongated weight means attached along and intermediate the ends of said cord and having a weight substantially greater than the suspended portion of said cord, a substantial length of said cord including said relatively rigid weight mean will resist winding up about said cross arm upon impact of a said ball by a striking implement; wherein said cross arm comprises a single bar member, a portion thereof closer to said free end being angled downwards to allow loops of cord which may become wrapped around said cross arm to drop off after a said ball is hit by a striking implement; and wherein said weight means has a weight of at least three-fourths of the combined weight of said card, said attachment means and said weight means.
Claim 7
Dependent Claim
37 words
The apparatus of claim 4 wherein said cross arm comprises a tubular bent member and wherein said cord runs through said tubular member, and said one end of said cord thus being located proximate to said standard.
Claim 8
Dependent Claim
30 words
The apparatus of claim 5 wherein said standard comprises a tubular member of greater diameter than said cross arm, allowing a telescoping interfit of said standard and said cross arm.
Claim 9
Dependent Claim
237 words
A tennis training device for use in training to hit a standard lawn tennis ball comprising: a substantially vertical standard; a cross arm having one end connected to the top of said standard and the other end thereof being free; a cord, one end susupended from said free end of said cross arm; a hook material strip for releasably holding a tennis ball to said cord, the hooks of said strip being pressed into a said tennis ball cover to allow the tennis ball to be suspended until a said tennis ball is hit by a striking implement, and thereupon to release a said tennis ball with a minimum of attachment overcoming force; and a weight attached to said cord intermediate said strip and said free end of said cross arm at a predetermined distance from said strip such that said weight will tend to prevent the wrapping of said cord about said cross arm after impact of a said tennis ball by a striking implement; and wherein said cross arm comprises a single bar member, a portion thereof closer to said free end being angled downwards to allow loops of cord which may become wrapped around said cross arm to drop off after a said tennis ball is hit by a striking implement; and wherein said weight has a weight of at least three-fourths of the combined weight of said cord, said strip and said weight
Claim 10
Dependent Claim
237 words
A tennis training device for use in training to hit a standard lawn tennis ball comprising: a substantially vertical standard; a cross arm having one end connected to the top of said standard and the other end thereof being free; a cord, one end susupended from said free end of said cross arm; a hook material strip for releasably holding a tennis ball to said cord, the hooks of said strip being pressed into a said tennis ball cover to allow the tennis ball to be suspended until a said tennis ball is hit by a striking implement, and thereupon to release a said tennis ball with a minimum of attachment overcoming force; and a weight attached to said cord intermediate said strip and said free end of said cross arm at a predetermined distance from said strip such that said weight will tend to prevent the wrapping of said cord about said cross arm after impact of a said tennis ball by a striking implement; and wherein said cross arm comprises a single bar member, a portion thereof closer to said free end being angled downwards to allow loops of cord which may become wrapped around said cross arm to drop off after a said tennis ball is hit by a striking implement; and wherein said weight has a weight of at least three-fourths of the combined weight of said cord, said strip and said weight
Claim 11
Dependent Claim
146 words
A sport training device to improve a player's ability to hit a ball comprising: a substantially vertical standard; a cross arm, one end attached to an elevated portion of said standard; a cord, one end of said cord connected to the other end of said cross arm; fastening means attached to the other end of said cord and releasably attaching a ball to said cord, a said ball being released upon impact; of said ball by a striking implement; and an elongated stiffening member attached to a length of said cord at a distance above said fastening means for decreasing the tendency of said cord to wrap around said cross arm after said ball is hit; wherein said elongated stiffening member comprises a member having a weight of at least three/quarters of the total weight of the cord, the fastening means and said elongated stiffening member.
Claim 12
Dependent Claim
146 words
A sport training device to improve a player's ability to hit a ball comprising: a substantially vertical standard; a cross arm, one end attached to an elevated portion of said standard; a cord, one end of said cord connected to the other end of said cross arm; fastening means attached to the other end of said cord and releasably attaching a ball to said cord, a said ball being released upon impact; of said ball by a striking implement; and an elongated stiffening member attached to a length of said cord at a distance above said fastening means for decreasing the tendency of said cord to wrap around said cross arm after said ball is hit; wherein said elongated stiffening member comprises a member having a weight of at least three/quarters of the total weight of the cord, the fastening means and said elongated stiffening 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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |