US3613773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant temperature output heat pipe
Assignee: RCA Corp
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Filing: 1964-12-07
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Granted: 1971-10-19
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Expires: 1984-12-07
Abstract
Abstract A heat pipe is provided with a noncondensible gas reservoir at the condenser end. The pressure of the gas and the size of the reservoir are selected to prevent a large change in the operating pressure, and thus the operating temperature, if the heat input to the heat pipe decreases.
Inventors
- 👤 William B Hall
- 👤 Fred G Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/06; H; H01; H01J; H01J45/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
A heat exchange apparatus comprising: a. a first envelope having a wall, b. a heat source adjacent to a first outer surface region of said wall, c. a heat utilization zone comprising a second outer surface region of said wall spaced from said first region, d. capillary means adjacent to the inner surface of said wall and extending from said first to said second region, e. a working vapor medium within said envelope and adapted to be converted to its vapor phase at a predetermined pressure by heat transfer to a first inner wall portion of said envelope in register with said first outer surface region, and to be condensed on the region of said capillary means in register with said second outer wall region, f. means for providing said predetermined pressure comprising a gas source communicating with said envelope, and g. a second envelope containing said gas source, said envelope having a larger volume than the volume of said first envelope.
Claim 2
Dependent Claim
162 words
A heat exchange apparatus comprising: a. a first envelope having a wall, b. a heat source adjacent to a first outer surface region of said wall, c. a heat utilization zone comprising a second outer surface region of said wall spaced from said first region, d. capillary means adjacent to the inner surface of said wall and extending from said first to said second region, e. a working vapor medium within said envelope and adapted to be converted to its vapor phase at a predetermined pressure by heat transfer to a first inner wall portion of said envelope in register with said first outer surface region, and to be condensed on the region of said capillary means in register with said second outer wall region, f. means for providing said predetermined pressure comprising a gas source communicating with said envelope, and g. a second envelope containing said gas source, said envelope having a larger volume than the volume of said first envelope.
Claim 3
Dependent Claim
95 words
A heat exchange apparatus comprising: a. an envelope having a heat input zone and a heat utilization zone spaced therefrom; b. capillary means within said envelope extending from said heat input zone to said heat utilization zone; c. a vaporizable working medium within said envelope for vaporizing in said heat input zone and for condensing in said heat utilization zone; and d. means for keeping the pressure of the vaporized working medium substantially constant comprising a volume of gas communicating with said envelope, said volume of gas being greater than the volume of said envelope.
Claim 4
Dependent Claim
95 words
A heat exchange apparatus comprising: a. an envelope having a heat input zone and a heat utilization zone spaced therefrom; b. capillary means within said envelope extending from said heat input zone to said heat utilization zone; c. a vaporizable working medium within said envelope for vaporizing in said heat input zone and for condensing in said heat utilization zone; and d. means for keeping the pressure of the vaporized working medium substantially constant comprising a volume of gas communicating with said envelope, said volume of gas being greater than the volume of said envelope.
Claim 5
Dependent Claim
19 words
The heat exchange apparatus of claim 2, wherein said volume of gas is proximate to said heat utilization zone.
Claim 6
Dependent Claim
21 words
The heat exchange apparatus of claim 2, wherein said volume of Gas is about 10 times the volume of said envelope.
Claim 7
Dependent Claim
14 words
The heat exchange apparatus of claim 2, wherein said gas is an inert gas.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |