US5033865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermo-actuator
Assignee: Individual
•
Filing: 1990-03-23
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Granted: 1991-07-23
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Expires: 2010-03-23
Abstract
Abstract A thermo-actuator has a steel rod, a guide member slidably mounted on the rod, a spool seal secured to the guide member, a heat conductive cylinder secured to the guide member, and wax pellets provided in the cylinder. The spool seal has a thin layer, so that the spool seal engages with the rod by a vacuum generated in the spool seal. The thickness of the spool seal is between 5% to 25% of the diameter of the steel rod.
Inventors
- 👤 Yoshikazu Kuze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:57
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/50; F16J15/52; G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F16J10/00; G01; G01K; G01K11/00; G01K11/06; G05D23/13; G05D23/1306; G05D23/132; G05D23/1326
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
69 words
A thermo-actuator comprising: a rod; a guide member slidably mounted on said rod; a spool seal secured to said guide member at an end portion thereof; a heat conductive cylinder secured to said guide member and surrounding said spool seal; and wax pellets provided within at least a portion of said cylinder; wherein said spool seal has a thickness between 5% to 25% of the diameter of said rod.
Claim 2
Dependent Claim
69 words
A thermo-actuator comprising: a rod; a guide member slidably mounted on said rod; a spool seal secured to said guide member at an end portion thereof; a heat conductive cylinder secured to said guide member and surrounding said spool seal; and wax pellets provided within at least a portion of said cylinder; wherein said spool seal has a thickness between 5% to 25% of the diameter of said rod.
Claim 3
Dependent Claim
35 words
The thermo-actuator according to claim 1, wherein said spool seal includes a skirt portion having a horn shape at the base portion of a cylindrical portion of the spool seal adjacent said heat conductive cylinder.
References Cited (Backward Citations)
US3080756A
Cited
US3207436A
Cited
US3231194A
Cited
US3407663A
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US3149455A
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US3308668A
Cited
US3357252A
Cited
US3719085A
Cited
US4235109A
Cited
US4337621A
Cited
US4441317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |