Patent US3091431A successfully refreshed from Google Patents.
US3091431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jack
Assignee: Walker Manufacturing Co
•
Filing: 1959-04-17
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Granted: 1963-05-28
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Expires: 1979-04-17
Abstract
No abstract record available.
Inventors
- 👤 Lyle L Arnes
- 👤 Bernard J Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:13
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/02; B66F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A JACK, A BASE, A COLUMN EXTENDING UPWARDLY FROM SAID BASE, A PUMP AND RECIPROCABLE FLUID MOTOR WITHIN SAID COLUMN, A LIFTING FRAME MOVABLY MOUNTED ON SAID COLUMN, TENSION LINK MEANS CONNECTING THE UPPER END OF SAID RECIPROCATING MOTOR WITH SAID LIFTING FRAME, A PUMP HANDLE HAVING A PORTION ROTATABLY MOUNTED AT THE UPPER END OF SAID COLUMN, MEANS CONNECTING SAID PUMP HANDLE PORTIONS WITH SAID PUMP, SAFETY DETENT MEANS ROCKABLY MOUNTED ON SAID PUMP HANDLE PORTION, DETENT SURFACES ON SAID TENSION LINK MEANS, AND SPRING MEANS URGING SAID DETENT INTO ENGAGEMENT WITH SAID SURFACES.
Claim 2
Dependent Claim
96 words
IN A JACK, A BASE, A COLUMN EXTENDING UPWARDLY FROM SAID BASE, A PUMP AND RECIPROCABLE FLUID MOTOR WITHIN SAID COLUMN, A LIFTING FRAME MOVABLY MOUNTED ON SAID COLUMN, TENSION LINK MEANS CONNECTING THE UPPER END OF SAID RECIPROCATING MOTOR WITH SAID LIFTING FRAME, A PUMP HANDLE HAVING A PORTION ROTATABLY MOUNTED AT THE UPPER END OF SAID COLUMN, MEANS CONNECTING SAID PUMP HANDLE PORTIONS WITH SAID PUMP, SAFETY DETENT MEANS ROCKABLY MOUNTED ON SAID PUMP HANDLE PORTION, DETENT SURFACES ON SAID TENSION LINK MEANS, AND SPRING MEANS URGING SAID DETENT INTO ENGAGEMENT WITH SAID SURFACES.
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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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |