Patent US3131601A successfully refreshed from Google Patents.
US3131601A
Expired / Lapsed
US
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Hydraulic system
Assignee: TDK Micronas GmbH
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Filing: 1961-06-22
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Granted: 1964-05-05
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Expires: 1981-06-22
Abstract
No abstract record available.
Inventors
- 👤 John R Curran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:57
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/2409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A FLUID CONTROL SYSTEM, CONDITION RESPONSIVE MEANS, A FLUID CYLINDER, A DOUBLE-ACTING PISTON IN SAID CYLINDER, A PAIR OF PORTS EACH COMMUNICATING RESPECTIVELY WITH A DIFFERENT SIDE OF SAID DOUBLE-ACTING PISTON, MEANS PRODUCING AN UNRESTRICTED FLUID STREAM NORMALLY ORIENTED TO ENTER ONE OF SAID PORTS, MEANS PRODUCING AN UNRESTRICTED CONTROL FLUID STREAM IMPINGING ON THE FIRST-MENTIONED STREAM FOR DEFLECTING THE SAME IN THE DIRECTION OF THE OTHER ONE OF SAID PORTS, AND MEANS MODULATING SAID FLUID CONTROL STREAM IN ACCORDANCE WITH POSITIONING OF SAID PISTON BY THE FIRST-
Claim 2
Dependent Claim
89 words
IN A FLUID CONTROL SYSTEM, CONDITION RESPONSIVE MEANS, A FLUID CYLINDER, A DOUBLE-ACTING PISTON IN SAID CYLINDER, A PAIR OF PORTS EACH COMMUNICATING RESPECTIVELY WITH A DIFFERENT SIDE OF SAID DOUBLE-ACTING PISTON, MEANS PRODUCING AN UNRESTRICTED FLUID STREAM NORMALLY ORIENTED TO ENTER ONE OF SAID PORTS, MEANS PRODUCING AN UNRESTRICTED CONTROL FLUID STREAM IMPINGING ON THE FIRST-MENTIONED STREAM FOR DEFLECTING THE SAME IN THE DIRECTION OF THE OTHER ONE OF SAID PORTS, AND MEANS MODULATING SAID FLUID CONTROL STREAM IN ACCORDANCE WITH POSITIONING OF SAID PISTON BY THE FIRST-
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |