Patent US3552371A successfully refreshed from Google Patents.
US3552371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baseball pitching machine
Assignee: Individual
•
Filing: 1968-02-09
•
Granted: 1971-01-05
•
Expires: 1988-02-09
Abstract
Abstract A portable manually operated collapsible baseball pitching machine having a centrifugally actuated ball throwing arm that is spring actuated, using a low force, long stroke concept with a vernier ball velocity and height control that is easily adjusted and regulated.
Inventors
- 👤 Edward W Kahelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:53
CPC Classifications
F; F41; F41B; F41B3/00; F41B3/02; F41B3/03; A; A63; A63B; A63B69/00; A63B69/40; A63B69/407; A63B69/408; F41J; F41J9/00; F41J9/16; F41J9/18; F41J9/20; A63B2210/00; A63B2210/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A baseball pitching machine comprising a tripod frame: a pitching arm pivotally mounted on said frame, said arm having ball holder means thereon for releasably retaining a ball; power means for swinging said arm and thus hurling a ball; adjustable means regulating the velocity and height of said ball in flight; and said power means consisting of a spring having a cable attached thereto, said cable being connected to a lever arm extension of said pitching arm, an energy booster arm connected to said lever arm and extending at an angle to the longitudinal axis thereof, means on said booster arm for guiding that portion of said cable intermediate said spring and the connection of said cable to said lever arm.
Claim 2
Dependent Claim
121 words
A baseball pitching machine comprising a tripod frame: a pitching arm pivotally mounted on said frame, said arm having ball holder means thereon for releasably retaining a ball; power means for swinging said arm and thus hurling a ball; adjustable means regulating the velocity and height of said ball in flight; and said power means consisting of a spring having a cable attached thereto, said cable being connected to a lever arm extension of said pitching arm, an energy booster arm connected to said lever arm and extending at an angle to the longitudinal axis thereof, means on said booster arm for guiding that portion of said cable intermediate said spring and the connection of said cable to said lever arm.
Claim 3
Dependent Claim
51 words
A baseball pitching machine as in claim 1 wherein said cable may be connected to said lever arm at selected points thereon, said means on said booster arm guiding said cable at various selected points on the booster arm to adjust the velocity imparted to said pitching arm by said spring.
Claim 4
Dependent Claim
24 words
A baseball machine as set forth in claim 1 wherein said frame is collapsible and made portable upon removal of a single fastening device.
Claim 5
Dependent Claim
159 words
A baseball pitching machine comprising a tripod frame: a pitching arm pivotally mounted on said frame, said arm a having ball holder means thereon for releasably retaining a ball; power means for swinging said arm and thus hurling said ball; adjustable means regulating the velocity and height of a ball in flight; said adjustable means including a trigger assembly for releasably retaining said pitching arm in cocked position; said trigger assembly being adjustable to vary the height of said pitching arm when in said cocked position to thus select a desired height of a ball when in flight; and said trigger assembly comprising a trigger means having a portion positioned to engage means on said pitching arm to latch the pitching arm in cocked condition, a screw means to raise and lower the trigger means, and said trigger means being manually movable to dIsengage said means on said pitching arm to release said pitching arm from its cocked condition.
Claim 6
Dependent Claim
159 words
A baseball pitching machine comprising a tripod frame: a pitching arm pivotally mounted on said frame, said arm a having ball holder means thereon for releasably retaining a ball; power means for swinging said arm and thus hurling said ball; adjustable means regulating the velocity and height of a ball in flight; said adjustable means including a trigger assembly for releasably retaining said pitching arm in cocked position; said trigger assembly being adjustable to vary the height of said pitching arm when in said cocked position to thus select a desired height of a ball when in flight; and said trigger assembly comprising a trigger means having a portion positioned to engage means on said pitching arm to latch the pitching arm in cocked condition, a screw means to raise and lower the trigger means, and said trigger means being manually movable to dIsengage said means on said pitching arm to release said pitching arm from its cocked condition.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |