Patent US3276381A successfully refreshed from Google Patents.
US3276381A
Expired / Lapsed
US
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Switching valve
Assignee: Individual
•
Filing: 1964-02-27
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Granted: 1966-10-04
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Expires: 1984-02-27
Abstract
No abstract record available.
Inventors
- 👤 Carroll D Harklau
- 👤 Roger L Harklau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:51
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/06; F04B43/067; F01; F01L; F01L23/00; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/111; F04B9/115
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
343 words
IN A SWITCHING VALVE, COMPRISING, A VALVE BODY, A CYLINDER DISPOSED ON ONE SIDE OF SAID VALVE BODY, A CYLINDER DISPOSED ON THE OPPOSITE SIDE OF SAID VALVE BODY FROM SAID FIRST CYLINDER, A MOVABLE SHAFT EXTENDING THROUGH SAID VALVE BODY INTO EACH OF SAID CYLINDERS, A PISTON IN EACH OF SAID CYLINDERS AND CONNECTED TO THE ADJACENT END OF SAID SHAFT, A CHAMBER FORMED IN EACH OF SAID CYLINDERS BETWEEN SAID PISTONS AND SAID VALVE BODY, INLET MEANS IN SAID VALVE BODY IN COMMUNICATION WITH EACH OF SAID CHAMBERS, OUTLET MEANS IN SAID VALVE BODY IN COMMUNICATION WITH EACH OF SAID CHAMBERS, A FIRST VALVE MEANS FOR ALTERNATELY BREAKING COMMUNICATION BETWEEN SAID OUTLET MEANS AND ONE CHAMBER AND SAID OUTLET MEANS AND THE OTHER CHAMBER, A SECOND VALVE MEANS FOR ALTERNATELY BREAKING COMMUNICATION BETWEEN SAID INLET MEANS AND ONE CHAMBER AND SAID INLET MEANS AND SAID OTHER CHAMBER, ACTUATING MEANS FOR SIMULTANEOUSLY ACTUATING SAID FIRST AND SECOND VALVE MEANS TO A FIRST POSITION FOR PLACING SAID ONE CHAMBER IN COMMUNICATION WITH SAID INLET MEANS AND CLOSING SAID ONE CHAMBER TO COMMUNICATION WITH SAID OUTLET MEANS, AND ALSO SIMULTANEOUSLY PLACING THE OUTLET MEANS IN COMMUNICATION WITH THE OTHER CHAMBER WHILE CLOSING THE INLET MEANS TO COMMUNICATION WITH SAID OTHER CHAMBER, AND TO A SECOND POSITION WHEREIN SIMULTANEOUSLY SAID ONE CHAMBER IS PLACED IN COMMUNICATION WITH SAID OUTLET MEANS AND SAID ONE CHAMBER IS CLOSED TO COMMUNICATION WITH SAID INLET MEANS, AND ALSO SIMULTANEOUSLY SAID OTHER CHAMBER IS PLACED IN COMMUNICATION WITH SAID INLET MEANS AND SAID OTHER CHAMBER IS CLOSED TO COMMUNICATION WITH SAID OUTLET MEANS, SPRING BIASED DETENT MEANS IN ENGAGEMENT WITH EACH OF SAID FIRST AND SECOND VALVE MEANS WHEN IN SAID FIRST AND SECOND POSITIONS TO YIELDINGLY LIMIT MOVEMENT OF SAID FIRST AND SECOND VALVE MEANS BETWEEN SAID FIRST AND SECOND PISITIONS, AND EACH OF SAID CYLINDERS HAVING A DIAPHRAGM THEREIN DISPOSED OUTWARDLY OF THE OUTER SIDES OF EACH OF SAID PISTONS, AND THE OUTER SIDE OF EACH PISTON AND THE ADJACENT DIAPHRAGM DEFINING A CHAMBER, SAID CHAMBER CONTAINING FLUID.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |