US3238961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid switch
Assignee: Schneider Electric Systems USA Inc
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Filing: 1963-10-10
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Granted: 1966-03-08
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Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard W Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:11
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/005; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2076; Y10T137/212; Y10T137/2125; Y10T137/2131
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FLUID LOGIC DEVICE COMPRISING TWO MAIN FLOW INPUTS, TWO MAIN FLOW OUTPUTS EACH SPECIFIC TO AND CAPABLE OF RECEIVING FLUID FROM ONLY ONE OF SAID INPUTS, A THIRD OUTPUT, COMMON TO BOTH OF SAID MAIN FLOW INPUTS, ONE AT A TIME ONLY, AND CONTROL INPUT MEANS IN ADDITION TO SAID MAIN FLOW INPUTS FOR TRANSVERSE APPLICATION OF CONTROL FLUID, SIMULTANEOUSLY TO BOTH AND ON THE SAME SIDE, TO FLUID FROM SAID INPUTS, TO SELECTIVELY APPLY SAID FLUID FROM SAID INPUTS TO SAID OUTPUTS WHEREBY ONLY ONE OF SAID MAIN FLOW INPUTS IS ESTABLISHED IN SAID COMMON OUTPUT AT ANY ONE TIME, AND WHEREBY EITHER INPUT CAN BE DIRECTED ONLY TO ITS SPECIFIC OUTPUT OR TO SAID COMMON OUTPUT.
Claim 2
Dependent Claim
119 words
A FLUID LOGIC DEVICE COMPRISING TWO MAIN FLOW INPUTS, TWO MAIN FLOW OUTPUTS EACH SPECIFIC TO AND CAPABLE OF RECEIVING FLUID FROM ONLY ONE OF SAID INPUTS, A THIRD OUTPUT, COMMON TO BOTH OF SAID MAIN FLOW INPUTS, ONE AT A TIME ONLY, AND CONTROL INPUT MEANS IN ADDITION TO SAID MAIN FLOW INPUTS FOR TRANSVERSE APPLICATION OF CONTROL FLUID, SIMULTANEOUSLY TO BOTH AND ON THE SAME SIDE, TO FLUID FROM SAID INPUTS, TO SELECTIVELY APPLY SAID FLUID FROM SAID INPUTS TO SAID OUTPUTS WHEREBY ONLY ONE OF SAID MAIN FLOW INPUTS IS ESTABLISHED IN SAID COMMON OUTPUT AT ANY ONE TIME, AND WHEREBY EITHER INPUT CAN BE DIRECTED ONLY TO ITS SPECIFIC OUTPUT OR TO SAID COMMON OUTPUT.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |