US4521016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball game apparatus
Assignee: Individual
•
Filing: 1981-06-26
•
Granted: 1985-06-04
•
Expires: 2001-06-26
Abstract
Abstract An apparatus for practicing tennis or other ball games including a pair of upstanding posts, an elastic cord extending between the posts and a ball connected to the elastic cord. A vertical net is arranged forwardly of the post and in the path of movement of the ball. When the ball is struck, the elastic cord stretches until the ball contacts the net which causes dissipation of at least some of the stored energy in the ball, thus reducing the rate of return of the ball towards the posts.
Inventors
- 👤 Yasuhiro Tominaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:01
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/0073; A63B69/0079; A63B69/0084
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
169 words
Apparatus for practicing a ball game or sports, comprising in combination: ball means; elastic cord means connected at one end to said ball means, said cord means being elastically stretched subsequent to striking of said ball means causing return of said ball means; slack net means having a front side and a rear side, said ball means disposed in front of said slack net means and in the path of movement thereof, for dissipating the stored energy in the ball means and thus reducing the rate of return of the ball means; a pair of spaced upstanding posts arranged in front of said slack net means, each of the upstanding posts being separated from the slack net means by a predetermined distance; a substantially horizontal post interconnecting said upstanding posts; means for anchoring the other end of the elastic cord means; and sheave means arranged substantially centrally of said horizontal post for connecting said ball means to said horizontal post by said cord means extending through said sheave means.
Claim 2
Dependent Claim
169 words
Apparatus for practicing a ball game or sports, comprising in combination: ball means; elastic cord means connected at one end to said ball means, said cord means being elastically stretched subsequent to striking of said ball means causing return of said ball means; slack net means having a front side and a rear side, said ball means disposed in front of said slack net means and in the path of movement thereof, for dissipating the stored energy in the ball means and thus reducing the rate of return of the ball means; a pair of spaced upstanding posts arranged in front of said slack net means, each of the upstanding posts being separated from the slack net means by a predetermined distance; a substantially horizontal post interconnecting said upstanding posts; means for anchoring the other end of the elastic cord means; and sheave means arranged substantially centrally of said horizontal post for connecting said ball means to said horizontal post by said cord means extending through said sheave means.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1, wherein said elastic cord means extends between and is fixed to the respective said posts and wherein said ball means is connected to said cord means substantially intermediate said posts.
Claim 4
Dependent Claim
37 words
Apparatus according to claim 1, wherein said cord means extends about further sheave means arranged adjacent one end of said horizontal post and extends along the adjacent said upstanding post to be anchored to said upstanding post.
Claim 5
Dependent Claim
45 words
Apparatus according to claim 3 and adapted for use indoors, and wherein each said upstanding post includes a pair of feet disposed at opposite ends thereof, each said foot being adapted to be moved into engagement with a respective floor and ceiling of a room.
Claim 6
Dependent Claim
37 words
Apparatus according to claim 4, wherein each said upstanding post includes an adjustable telescopic post portion each said portion being adapted to be extended whereby to cause said feet to engage with said floor and ceiling respectively.
Claim 7
Dependent Claim
29 words
Apparatus according to claim 1 wherein said net means comprises a net supported about its perimeter by a rectangular framework, said framework being disposed in a substantially vertical plane.
Claim 8
Dependent Claim
30 words
Apparatus according to claim 6 and including a rope extending around said net perimeter and wherein said rope may be adjusted to provide the slack state in said net means.
Claim 9
Dependent Claim
58 words
Apparatus according to claim 6 or 7, wherein said framework includes a pair of upstanding side posts and respective feet disposed at opposite ends of said side posts, each said foot being adapted to be moved into engagement with a respective floor and ceiling of a room whereby to support said net means in a substantially vertical plane.
Claim 10
Dependent Claim
26 words
Apparatus according to claim 1, wherein the length of said cord means between said sheave means and said ball is slightly shorter than said predetermined distance.
Claim 11
Dependent Claim
16 words
apparatus according to claim 1, wherein said cord means is made of a stiff nylon cord.
Claim 12
Dependent Claim
46 words
An apparatus as claimed in claim 1, wherein said slack net means includes a flexible net, and erecting post means for supporting said flexible net in an erect but slackened condition, and said means for anchoring being located spaced from the front of said flexible net.
Claim 13
Dependent Claim
156 words
Apparatus for practicing a ball game or sports, comprising in combination: ball means; elastic cord means connected at one end to said ball means, said cord means being elastically stretched subsequent to striking of said ball means causing return of said ball means; slack net means having a front side and a rear side, said ball means disposed in front of said slack net means and in the path of movement thereof, for dissipating substantially all of the stored energy in the ball means and thus reducing the rate of return of the ball means; supporting means placed in front of said slack net means, said supporting means being separated from the slack net means by a predetermined distance; means for anchoring the other end of the elastic cord means; and sheave means arranged on said supporting means for connecting said ball means to said supporting means by said cord means extending through said sheave means.
Claim 14
Dependent Claim
156 words
Apparatus for practicing a ball game or sports, comprising in combination: ball means; elastic cord means connected at one end to said ball means, said cord means being elastically stretched subsequent to striking of said ball means causing return of said ball means; slack net means having a front side and a rear side, said ball means disposed in front of said slack net means and in the path of movement thereof, for dissipating substantially all of the stored energy in the ball means and thus reducing the rate of return of the ball means; supporting means placed in front of said slack net means, said supporting means being separated from the slack net means by a predetermined distance; means for anchoring the other end of the elastic cord means; and sheave means arranged on said supporting means for connecting said ball means to said supporting means by said cord means extending through said sheave means.
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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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |