Patent US3558134A successfully refreshed from Google Patents.
US3558134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball throwing accuracy training apparatus
Assignee: Individual
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Filing: 1968-10-28
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Granted: 1971-01-26
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Expires: 1988-10-28
Abstract
Abstract Apparatus to teach ball throwing accuracy comprising a pair of spaced-apart standards stretched between which is a removable guide wire having threaded thereon diametrically apertured balls adapted to be grasped for throwing along the guide wire in teaching arm movements for improved throwing accuracy. The standards are adjustable as to height to suit the height of any particular trainee to be taught.
Inventors
- 👤 Harry H Hoitsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:15
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/0073; A63B69/0075; A63B2208/00; A63B2208/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
184 words
A ball-throwing apparatus comprising in combination, a pair of standards, each having a base and an upstanding tubular post structure, said post structure comprising a first tubular post and a second tubular post telescopically received in said first post, and means for adjustably securing said second post with respect to said first post, a guide wire, means removably attaching the ends of said guide wire, one each, with respect to upper end portions of said tubular post structures, and a ball having a diametrical through opening through which said guide wire is threaded for constraining said ball to substantially rectilinear movement along said guide wire when said guide wire is stretched between said standards, wherein said guide wire attachment means comprises a vertically disposed backboard affixed to the upper end of said second tubular post member, a traverse opening through said backboard member, an increased diameter head member affixed at each end of said guide wire, said head members being receivable through said opening, and releaseable latch means at the back of said backboard for preventing withdrawal of said head member from said opening.
Claim 2
Dependent Claim
184 words
A ball-throwing apparatus comprising in combination, a pair of standards, each having a base and an upstanding tubular post structure, said post structure comprising a first tubular post and a second tubular post telescopically received in said first post, and means for adjustably securing said second post with respect to said first post, a guide wire, means removably attaching the ends of said guide wire, one each, with respect to upper end portions of said tubular post structures, and a ball having a diametrical through opening through which said guide wire is threaded for constraining said ball to substantially rectilinear movement along said guide wire when said guide wire is stretched between said standards, wherein said guide wire attachment means comprises a vertically disposed backboard affixed to the upper end of said second tubular post member, a traverse opening through said backboard member, an increased diameter head member affixed at each end of said guide wire, said head members being receivable through said opening, and releaseable latch means at the back of said backboard for preventing withdrawal of said head member from said opening.
Claim 3
Dependent Claim
33 words
A ball-throwing training apparatus as defined in claim 1, including a plurality of balls threaded along said guide wire, each ball having a diametrically extending antifriction sleeve through which said guide wire extends.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |