US3414231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric valve
Assignee: Robertshaw Controls Co
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Filing: 1964-02-17
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Granted: 1968-12-03
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Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Kreuter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:18
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/1921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AMBIENT TEMPERATURE COMPENSATED VALVE COMPRISING A VALVE BODY WITH INLET AND OUTLET PORTS, A VALVE SEAT DEFINING A VALVE OPENING IN THE BODY BETWEEN THE PORTS, A VALVE STEM EXTENDING THROUGH THE VALVE OPENING, SAID VALVE STEM HAVING EACH END EXTENDING FROM EACH SIDE OF THE VALVE BODY, A VALVE HEAD MOUNTED ON THE MID-PORTION OF SAID VALVE STEM BELOW THE VALVE SEAT, A VAPOR FILLED POWER UNIT CONNECTED ON EACH END OF THE VALVE STEM, SAID UNITS BEING NORMALLY RESPONSIVE ONLY TO AMBIENT TEMPERATURE, EACH UNIT INCLUDING A SPRING ACTING BELLOWS WITH THE TOP CONNECTED TO EACH RESPECTIVE END OF THE VALVE STEM, EACH POWER UNIT BEING SEALED FROM THE CONTROLLED FLUID IN THE VALVE BODY BY A DIAPHRAGM HAVING AN EFFECTIVE FLUID PRESSURE AREA EQUAL TO THAT OF THE VALVE HEAD AND SAID POWER UNITS BEING OF EQUALLY CHARGED CAPACITY TO COMPENSATE FOR AMBIENT TEMPERATURE VARIATIONS, SAID
Claim 2
Dependent Claim
149 words
AMBIENT TEMPERATURE COMPENSATED VALVE COMPRISING A VALVE BODY WITH INLET AND OUTLET PORTS, A VALVE SEAT DEFINING A VALVE OPENING IN THE BODY BETWEEN THE PORTS, A VALVE STEM EXTENDING THROUGH THE VALVE OPENING, SAID VALVE STEM HAVING EACH END EXTENDING FROM EACH SIDE OF THE VALVE BODY, A VALVE HEAD MOUNTED ON THE MID-PORTION OF SAID VALVE STEM BELOW THE VALVE SEAT, A VAPOR FILLED POWER UNIT CONNECTED ON EACH END OF THE VALVE STEM, SAID UNITS BEING NORMALLY RESPONSIVE ONLY TO AMBIENT TEMPERATURE, EACH UNIT INCLUDING A SPRING ACTING BELLOWS WITH THE TOP CONNECTED TO EACH RESPECTIVE END OF THE VALVE STEM, EACH POWER UNIT BEING SEALED FROM THE CONTROLLED FLUID IN THE VALVE BODY BY A DIAPHRAGM HAVING AN EFFECTIVE FLUID PRESSURE AREA EQUAL TO THAT OF THE VALVE HEAD AND SAID POWER UNITS BEING OF EQUALLY CHARGED CAPACITY TO COMPENSATE FOR AMBIENT TEMPERATURE VARIATIONS, SAID
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |