Patent US4422501A successfully refreshed from Google Patents.
US4422501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
External artery heat pipe
Assignee: Boeing Co
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Filing: 1982-01-22
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Granted: 1983-12-27
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Expires: 2002-01-22
Abstract
Abstract An improved heat pipe (115) of increased heat transport capacity comprising a vapor tube (120) and a liquid-condensate return tube (130). An outwardly extending conduit (125), disposed in both the evaporator section (135) and evaporator section (140) of the heat pipe (115), provides fluid communication between the vapor tube (120) and the return tube (130). Circumferential v-shaped grooves (145) terminate at a slot-like opening (165) formed in each of the conduits (125). A cap member (170) traverses each opening (165) and coacts with the grooves (145) to form a plurality of fluid passageways (175).
Inventors
- 👤 James L. Franklin
- 👤 Roger L. Shannon
- 👤 Dale F. Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:54
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04; F28F; F28F2200/00; F28F2200/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
Heat transfer apparatus, comprising: a closed chamber, a working fluid disposed in said chamber, a plurality of grooves distributed seriatim within said chamber for conducting said fluid, an axial fluid channel extending along said chamber, each of said grooves terminating at said channel, an elongated cap member traversing said channel and coacting with said grooves to form a plurality of fluid passageways, a fluid-transporting conduit extending outwardly from said channel, and a fluid-conducting tube extending proximate said chamber in fluid communication with said conduit.
Claim 2
Dependent Claim
84 words
Heat transfer apparatus, comprising: a closed chamber, a working fluid disposed in said chamber, a plurality of grooves distributed seriatim within said chamber for conducting said fluid, an axial fluid channel extending along said chamber, each of said grooves terminating at said channel, an elongated cap member traversing said channel and coacting with said grooves to form a plurality of fluid passageways, a fluid-transporting conduit extending outwardly from said channel, and a fluid-conducting tube extending proximate said chamber in fluid communication with said conduit.
Claim 3
Dependent Claim
33 words
The apparatus of claim 1, further comprising a condenser section and an evaporator section defined within said chamber, said grooves and said channel being disposed within said condenser section and said evaporator section.
Claim 4
Independent Claim
27 words
The apparatus of claims 1 or 2, wherein said chamber is a tube and said grooves are circumferentially disposed within said tube, said grooves being substantially v-shaped.
Claim 5
Dependent Claim
30 words
The apparatus of claim 3, further comprising a substantially adiabatic section, said adiabatic section being provided with a condensate drain conduit, said drain conduit communicating with said fluid conducting tube.
Claim 6
Dependent Claim
21 words
The apparatus of claim 4, further comprising a screen disposed in said adiabatic section covering the inlet of said drain conduit.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |