US3246604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-rate pump
Assignee: Individual
•
Filing: 1963-11-20
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Granted: 1966-04-19
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Expires: 1983-11-20
Abstract
No abstract record available.
Inventors
- 👤 Harrison D Brailsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/06; F04B9/00; F04B9/02; F04B9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A PUMP COMPRISING: A HOLLOW CYLINDER CLOSED AT ONE END; A PISTON AXIALLY SLIDABLE THEREIN; A PISTON ROD HAVING ONE END RIGIDLY ATTACHED TO SAID PISTON; A YOKE ATTACHED TO THE OTHER END OF SAID PISTON ROD OUTSIDE OF SAID CYLINDER, SAID YOKE HAVING AN AXIALLY ELONGATED SLOT THEREIN; A PIVOTAL MOUNTING FOR SAID PISTON TO TILT SAID PISTON BETWEEN TWO LIMITING POSITIONS AND ABOUT AN AXIS SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF SAID PISTON; AN OPENING IN THE WALL OF SAID CYLINDER NEAR THE CLOSED END THEREOF; A PAIR OF OF CHANNELS, ONE OF SAID CHANNELS COMMUNICATING WITH SAID OPENING WHEN SAID PISTON IS TILTED TO ONE OF ITS LIMITING POSITIONS AND THE OTHER OF SAID CHANNELS COMMUNICATING WITH SAID OPENING WHEN SAID PISTON IS TILTED TO THE OTHER OF ITS LIMITING POSITIONS; AN ECCENTRIC HAVING A SHAFT SUBSTANTIALLY PARALLEL WITH THE AXIS OF SAID PIVOTAL MOUNTING AND AN OFFSET PIN EXTENDING INTO SAID SLOT OF SAID YOKE AND SUBSTANTIALLY FILLING THE WIDTH OF SAID SLOT TO PIVOT SAID CYLINDER TO BOTH OF ITS LIMITING POSITIONS AS SAID ECCENTRIC ROTATES.
Claim 2
Dependent Claim
181 words
A PUMP COMPRISING: A HOLLOW CYLINDER CLOSED AT ONE END; A PISTON AXIALLY SLIDABLE THEREIN; A PISTON ROD HAVING ONE END RIGIDLY ATTACHED TO SAID PISTON; A YOKE ATTACHED TO THE OTHER END OF SAID PISTON ROD OUTSIDE OF SAID CYLINDER, SAID YOKE HAVING AN AXIALLY ELONGATED SLOT THEREIN; A PIVOTAL MOUNTING FOR SAID PISTON TO TILT SAID PISTON BETWEEN TWO LIMITING POSITIONS AND ABOUT AN AXIS SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF SAID PISTON; AN OPENING IN THE WALL OF SAID CYLINDER NEAR THE CLOSED END THEREOF; A PAIR OF OF CHANNELS, ONE OF SAID CHANNELS COMMUNICATING WITH SAID OPENING WHEN SAID PISTON IS TILTED TO ONE OF ITS LIMITING POSITIONS AND THE OTHER OF SAID CHANNELS COMMUNICATING WITH SAID OPENING WHEN SAID PISTON IS TILTED TO THE OTHER OF ITS LIMITING POSITIONS; AN ECCENTRIC HAVING A SHAFT SUBSTANTIALLY PARALLEL WITH THE AXIS OF SAID PIVOTAL MOUNTING AND AN OFFSET PIN EXTENDING INTO SAID SLOT OF SAID YOKE AND SUBSTANTIALLY FILLING THE WIDTH OF SAID SLOT TO PIVOT SAID CYLINDER TO BOTH OF ITS LIMITING POSITIONS AS SAID ECCENTRIC ROTATES.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |