US3320388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination bimetal thermal switch mounted in between a rod and tube thermal responsive device
Assignee: Robertshaw Controls Co
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Filing: 1965-12-30
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Granted: 1967-05-16
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Expires: 1985-12-30
Abstract
No abstract record available.
Inventors
- 👤 Kreuter Kenneth Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:57
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/002; H01H37/02; H01H37/32; H01H37/46; H01H37/48; H01H37/52; H01H37/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A THERMAL RESPONSIVE DEVICE HAVING DUAL TEMPERATURE RESPONSIVE MEANS COMPRISING FIRST TEMPERATURE SENSOR MEANS INCLUDING A TUBE OF THERMALLY EXPANDABLE, HEAT CONDUCTIVE MATERIAL AND A ROD OF THERMALLY NON-EXPANDABLE MATERIAL LONGITUDINALLY DISPOSED IN SAID TUBE IN SPACED RELATION THERETO, SAID ROD AND TUBE HAVING ADJACENT END PORTIONS SECURED TOGETHER WHEREBY SAID ROD IS MOVED LONGITUDINALLY IN RESPONSE TO EXPANSION AND CONTRACTION OF SAID TUBE, SECOND TEMPERATURE SENSOR MEANS INCLUDING A HOLLOW CYLINDRICAL ENCLOSURE HAVING RADIALLY SPACED INNER AND OUTER WALLS, A BOTTOM WALL JOINING ADJACENT ENDS OF SAID WALLS AND AN ANNULAR INSULATING COVER DISPOSED BETWEEN SAID WALLS AT THEIR OTHER ENDS,
Claim 2
Dependent Claim
102 words
A THERMAL RESPONSIVE DEVICE HAVING DUAL TEMPERATURE RESPONSIVE MEANS COMPRISING FIRST TEMPERATURE SENSOR MEANS INCLUDING A TUBE OF THERMALLY EXPANDABLE, HEAT CONDUCTIVE MATERIAL AND A ROD OF THERMALLY NON-EXPANDABLE MATERIAL LONGITUDINALLY DISPOSED IN SAID TUBE IN SPACED RELATION THERETO, SAID ROD AND TUBE HAVING ADJACENT END PORTIONS SECURED TOGETHER WHEREBY SAID ROD IS MOVED LONGITUDINALLY IN RESPONSE TO EXPANSION AND CONTRACTION OF SAID TUBE, SECOND TEMPERATURE SENSOR MEANS INCLUDING A HOLLOW CYLINDRICAL ENCLOSURE HAVING RADIALLY SPACED INNER AND OUTER WALLS, A BOTTOM WALL JOINING ADJACENT ENDS OF SAID WALLS AND AN ANNULAR INSULATING COVER DISPOSED BETWEEN SAID WALLS AT THEIR OTHER ENDS,
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |