US3930486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible baseball and tennis practice machine
Assignee: Individual
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Filing: 1974-06-17
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Granted: 1976-01-06
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Expires: 1994-06-17
Abstract
Abstract An improved compressed fluid ball projecting machine convertable for baseball and tennis practice. Improvements are in maneuverability, oscillation of the tennis barrel and immobility of the baseball barrel, remote control power for coaching options, replaceable and interchangeable barrels, variable timer speed control and a reliable hopper and feed system to enable firing of up to two hundred tennis balls unattended and without malfunction. Regarding the oscillation or lack of oscillation of the barrel, an actuator rod mounted on a rotatable disc causes such oscillation. When this rod is removed and the barrel clamped, this oscillation is eliminated. Concerning the variable timer control, such control is varied by two relatively movable rotatable notched discs. These dics contact a valve actuating mechanism and permit opening of a valve operated thereby only when the notches of the pair of discs are aligned and in contact with the valve actuating mechanism.
Inventors
- 👤 Edward W. Kahelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/40; A63B69/409; F; F41; F41B; F41B11/00; A63B47/00; A63B47/002; A63B2047/004; A63B2069/402
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
211 words
A compressed air ball projecting machine having an ejection barrel to receive and eject balls, an air supply tank for subjecting a ball in said barrel to compressed air to eject said ball from said barrel, moving means for moving said barrel through lateral oscillations as balls of one type are cyclically ejected from said barrel to vary the direction of ejection of said balls, an air line through which compressed air is pumped into said air supply tank, valve means in said air line to regulate the flow of air therethrough, said valve means having an actuating lever the position of which determines the passage and non-passage of air through said valve means, a pair of notched discs engageable with said actuating lever, a timing motor for rotating said notched discs past said actuating lever to change the position thereof in accordance with the rotational position of the notches on said discs, said lever having an end with a thickness approximately equal to the thickness of said pair of discs whereby said actuating lever is moved only upon axial alignment of notched portions of both discs moving past said actuating lever, said discs being further selectively rotatable relative to each other to vary the axial alignment of said notched portions.
Claim 2
Dependent Claim
211 words
A compressed air ball projecting machine having an ejection barrel to receive and eject balls, an air supply tank for subjecting a ball in said barrel to compressed air to eject said ball from said barrel, moving means for moving said barrel through lateral oscillations as balls of one type are cyclically ejected from said barrel to vary the direction of ejection of said balls, an air line through which compressed air is pumped into said air supply tank, valve means in said air line to regulate the flow of air therethrough, said valve means having an actuating lever the position of which determines the passage and non-passage of air through said valve means, a pair of notched discs engageable with said actuating lever, a timing motor for rotating said notched discs past said actuating lever to change the position thereof in accordance with the rotational position of the notches on said discs, said lever having an end with a thickness approximately equal to the thickness of said pair of discs whereby said actuating lever is moved only upon axial alignment of notched portions of both discs moving past said actuating lever, said discs being further selectively rotatable relative to each other to vary the axial alignment of said notched portions.
Claim 3
Dependent Claim
32 words
A compressed air ball projecting machine as set forth in claim 1, and stabilizing means for stabilizing the direction of said barrel for ball ejection when balls of another type are used.
Claim 4
Dependent Claim
41 words
A compressed air ball projecting machine as in claim 1 wherein said discs have notches adjustably positioned to move said actuating lever selectively once every 360° of rotation of said discs, once every 180°, and once at 150° and 360° spacing.
Claim 5
Dependent Claim
154 words
A compressed air ball projecting machine having an ejection barrel to receive and eject balls, an air supply tank for subjecting a ball in said barrel to compressed air to eject said ball from said barrel, moving means for moving said barrel through lateral oscillations as balls of one type are cyclically ejected from said barrel to vary the direction of ejection of said balls, said moving means comprising a rotating disc, an acutator rod pivotally mounted on said disc at a pivot point spaced from the center thereof for circular movement of said rod, a pair of fingers having said rod positioned therebetween for vertical movement, and an eye bolt positioned between said disc and said fingers and having said rod extending therethrough, said machine being pivotally mounted and having said eye bolt connected thereto whereby rotation of said disc causes lateral movement of said eye bolt and thus oscillation of said machine.
Claim 6
Dependent Claim
154 words
A compressed air ball projecting machine having an ejection barrel to receive and eject balls, an air supply tank for subjecting a ball in said barrel to compressed air to eject said ball from said barrel, moving means for moving said barrel through lateral oscillations as balls of one type are cyclically ejected from said barrel to vary the direction of ejection of said balls, said moving means comprising a rotating disc, an acutator rod pivotally mounted on said disc at a pivot point spaced from the center thereof for circular movement of said rod, a pair of fingers having said rod positioned therebetween for vertical movement, and an eye bolt positioned between said disc and said fingers and having said rod extending therethrough, said machine being pivotally mounted and having said eye bolt connected thereto whereby rotation of said disc causes lateral movement of said eye bolt and thus oscillation of said machine.
Claim 7
Dependent Claim
32 words
A compressed air ball projecting machine as set forth in claim 4, and stabilizing means for stabilizing the direction of said barrel for ball ejection when balls of another type are used.
Claim 8
Dependent Claim
33 words
A compressed air ball projecting machine as set forth in claim 4 wherein the eye of said eye bolt is vertically moveable to adjust the range of oscillation of said machine as desired.
References Cited (Backward Citations)
US592221A
Cited
FR406430A
Cited
DE901386C
Cited
US3018769A
Cited
US3277879A
Cited
US3467073A
Cited
US3585978A
Cited
US3602208A
Cited
US3568653A
Cited
US3640263A
Cited
US3724437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |