US4090559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer device
Assignee: United States Department of the Navy
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Filing: 1974-08-14
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Granted: 1978-05-23
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Expires: 1994-08-14
Abstract
Abstract A heat transfer device comprising a spiral brush insert within a tube of rmally conductive material. The brush insert has a diameter slightly larger than the inside diameter of the tube and is inserted from the downstream end of the tube so that the tips of the brush deflect to form a friction fit for imbedding within the tube wall and thereby prevent movement of the brush insert during normal fluid flow in the device.
Inventors
- 👤 Ferdi E. Megerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:01
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12; F28F1/00; F28F1/10; F28F1/40; Y; Y10; Y10S; Y10S165/00; Y10S165/51; Y10S165/518; Y10S165/524; Y10S165/525; Y10S165/526
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
A heat transfer device, comprising, in combination: a thermally conductive tube having a predetermined inside radius and adapted to receive a fluid flow in one direction; and a thermally conductive brush frictionally and thermally fixed in coaxial alignment within said tube including a stem and a plurality of bristles radially mounted about said stem, each of said bristles having a radial length slightly greater than said radius of said tube and deflected in said one direction from said stem and having the distal ends of said bristles frictionally embed the inner surface of said tube; whereby the frictional force fixing said brush within said tube is equal and opposite to the total force of the fluid against said brush.
Claim 2
Dependent Claim
119 words
A heat transfer device, comprising, in combination: a thermally conductive tube having a predetermined inside radius and adapted to receive a fluid flow in one direction; and a thermally conductive brush frictionally and thermally fixed in coaxial alignment within said tube including a stem and a plurality of bristles radially mounted about said stem, each of said bristles having a radial length slightly greater than said radius of said tube and deflected in said one direction from said stem and having the distal ends of said bristles frictionally embed the inner surface of said tube; whereby the frictional force fixing said brush within said tube is equal and opposite to the total force of the fluid against said brush.
Claim 3
Dependent Claim
27 words
A heat transfer device according to claim 1 wherein each of said bristles are of predetermined rigidity to resist deformation by the force of said fluid flow.
Claim 4
Dependent Claim
26 words
A heat transfer device according to claim 2 wherein said bristles form an acute angle with the inner surface of said tube at the distal ends.
Claim 5
Dependent Claim
24 words
A heat transfer device according to claim 3 wherein said plurality of bristles are axially displaced along said stem to form a spiral therewith.
References Cited (Backward Citations)
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Cited
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Cited
US2310970A
Cited
US2453448A
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Cited
US3935715A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |