US3602429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved heat pipe
Assignee: Isotopes Inc
•
Filing: 1968-11-04
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Granted: 1971-08-31
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Expires: 1988-11-04
Abstract
Abstract A selectively operated mechanical valve within the vapor phase passage of a heat pipe to control the isothermal transfer of thermal energy.
Inventors
- 👤 William J Levedahl
- 👤 Sidney Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:28
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04; B; B60; B60H; B60H1/00; B60H1/02; B60H1/025; F28D15/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
A fast-acting automobile heating system for an automobile including an engine, an exhaust manifold and a duct for delivering air to the passenger compartment, said system comprising; a heat pipe having an evaporator section positioned within the exhaust manifold and a condenser section within the air duct, a normally open valve carried by said heat pipe within the heat pipe vapor passage, and thermal motor means carried by said heat pipe vapor passage, and thermal motor means carried by said heat pipe for closing said normally open valve in response to increase in temperature of the heat pipe working fluid, said heat pipe being tubular in configuration, said inner surface of said tubular heat pipe including capillary transport means, said normally open valve comprising a butterfly-type valve disc having a diameter on the order of the inner diameter of said capillary transport structure.
Claim 2
Dependent Claim
143 words
A fast-acting automobile heating system for an automobile including an engine, an exhaust manifold and a duct for delivering air to the passenger compartment, said system comprising; a heat pipe having an evaporator section positioned within the exhaust manifold and a condenser section within the air duct, a normally open valve carried by said heat pipe within the heat pipe vapor passage, and thermal motor means carried by said heat pipe vapor passage, and thermal motor means carried by said heat pipe for closing said normally open valve in response to increase in temperature of the heat pipe working fluid, said heat pipe being tubular in configuration, said inner surface of said tubular heat pipe including capillary transport means, said normally open valve comprising a butterfly-type valve disc having a diameter on the order of the inner diameter of said capillary transport structure.
Claim 3
Dependent Claim
35 words
The automobile heating system as claimed in claim 1 wherein said thermal motor comprises a sealed bellows motor carried by said condenser section of said heat pipe and operatively coupled to said butterfly-type valve disc.
Claim 4
Dependent Claim
58 words
The automobile heating system as claimed in claim 2 wherein said valve member is positioned within said thermal energy transport section of said heat pipe, said heat transport section carries adiabatic insulation means and said evaporator and condenser sections include external fins carried by said heat pipe and extending respectively within said air duct and said exhaust manifold.
Claim 5
Dependent Claim
16 words
The automobile heating system as claimed in claim 1 wherein said vaporizable working fluid comprises water.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |