US3680189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a heat pipe
Assignee: NOREN PRODUCTS Inc
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Filing: 1970-12-09
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Granted: 1972-08-01
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Expires: 1990-12-09
Abstract
Abstract The specification and drawings disclose flat heat pipe structures and methods for forming same. One embodiment comprises an outer tube into which a second tube of wick material is inserted. The outer tube and the wick tube are selected so that the wick has a higher tensile strength. Thereafter, the outer tube can be deformed to a flattened configuration and the higher tensile strength of the wick causes it to closely engage the inner surface of the outer tube. The second embodiment comprises a sandwich-like construction of outer wall forming plate members, wick sheets, and intermediate spacers bonded to both the wick sheets and the outer wall forming plates.
Inventors
- 👤 Don W Noren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:42
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0233; F28D15/0283; F28D15/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49353
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A method of forming a heat pipe comprising the steps of: a. selecting a tube having a desired length and formed from a deformable material; b. forming a cylinder of wick material with an outer diameter which closely approximates the inner diameter of the tube and formed from a deformable material having higher tensile strength than the tube; c. positioning the cylinder in the tube; and, d. thereafter, applying pressure to generally diametrically opposite sides of the assembly in an amount sufficient to deform the tubing''s circular cross-section to a cross-section throughout a substantial portion of the length which has at least one generally flat exterior wall.
Claim 2
Independent Claim
107 words
A method of forming a heat pipe comprising the steps of: a. selecting a tube having a desired length and formed from a deformable material; b. forming a cylinder of wick material with an outer diameter which closely approximates the inner diameter of the tube and formed from a deformable material having higher tensile strength than the tube; c. positioning the cylinder in the tube; and, d. thereafter, applying pressure to generally diametrically opposite sides of the assembly in an amount sufficient to deform the tubing''s circular cross-section to a cross-section throughout a substantial portion of the length which has at least one generally flat exterior wall.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein the pressure is applied in a manner so that the diametrically opposite sides are deformed so as to both be generally flat and parallel substantially throughout the length of the tube.
Claim 4
Dependent Claim
15 words
The method as defined in claim 1 wherein the ends of the tube are sealed.
Claim 5
Dependent Claim
33 words
The method as defined in claim 1 wherein said cylinder is provided with a length slightly less than the length of said tube and wherein the cylinder is positioned entirely within said tube.
Claim 6
Dependent Claim
16 words
The method as defined in claim 1 wherein said cylinder is formed from fine wire screen.
Claim 7
Dependent Claim
24 words
The method as defined in claim 1 wherein the ends of said tube are sealed after the tube has been deformed the desired cross-section.
Claim 8
Dependent Claim
22 words
The method as defined in claim 1 wherein portions of the exterior surfaces of said tubing are coated with electrical insulating material.
Claim 9
Dependent Claim
23 words
The method as defined in claim 1 wherein the tube is formed from hard copper and the wick material is phospher bronze screening.
Claim 10
Dependent Claim
18 words
The method of claim 1 wherein the interior of said tube is provided with longitudinally extending score lines.
Claim 11
Dependent Claim
20 words
The method as defined in claim 9 wherein said score lines are formed by abrading the interior of said tube.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |