Patent US3664582A successfully refreshed from Google Patents.
US3664582A
Expired / Lapsed
US
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Non-linear temperature responsive valve assemblies
Assignee: Robertshaw Controls Co
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Filing: 1969-10-29
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Granted: 1972-05-23
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Expires: 1989-10-29
Abstract
Abstract A TEMPERATURE RESPONSIVE VALVE ASSEMBLY INCLUDING AN INLET, AN OUTLET AND A VALVE MEMBER MOUNTED THEREBETWEEN AND ADAPTED TO BE POSITIONED BY AN OPERATOR MEMBER CONSTRUCTED OF A MATERIAL HAVING A TEMPERATURE-ACTUATED SHAPE MEMORY. THE OPERATOR MEMBER IS LOCATED ADJACENT THE DOWNSTREAM SIDE OF THE VALVE ASSEMBLY WHEREBY FLUID FLOW THERETHROUGH IS REGULATED IN RELATION TO DOWNSTREAM FLUID TEMPERATURE. THE PARTICULAR ACTUATING TEMPERATURE OF THE OPERATOR MEMBER CAN BE FIXED OR CAN BE ADJUSTED AS BY VARYING THE STRESS APPLIED THERETO BY SPRINGS.
Inventors
- 👤 Wilbur F Jackson
- 👤 James R Willson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:35
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/024; F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |