US3911547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of porous tubes having small pores
Assignee: European Atomic Energy Community Euratom
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Filing: 1973-10-25
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Granted: 1975-10-14
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Expires: 1993-10-25
Abstract
Abstract A process for producing porous tubes having very small pores in which strips of commercial metal cloth are wound spirally in an overlapping manner to form a hollow member. The hollow member is then sintered by means of a sintering support member brought into contact with its inner or outer surface. Porous tubes prepared by the process are resilient, have reduced wall thickness and very fine pores. Heat pipes may be produced by the process.
Inventors
- 👤 Peter Vinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/08; B; B21; B21C; B21C37/00; B21C37/06; F; F16; F16L; F16L11/00; F16L11/14; F16L11/16; F28; F28D; F28D15/00; F28D15/02; F28D15/04; F28D15/046; F28F; F28F2200/00; F28F2200/005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49353; Y10T29/496; Y10T29/49602
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A process for producing porous tubes, said process comprising: winding at least one strip of commercial metal cloth in an overlaping spiral form to form a hollow member having an inner surface and an outer surface, bringing the outer surface into contact with a sintering support member having half-shells which enclose said wound strips, introducing ceramic beads into the cavity of the hollow member to create contact pressure between the hollow member and the half-shells, sintering the wound cloth and removing the sintered cloth from the support member.
Claim 2
Dependent Claim
88 words
A process for producing porous tubes, said process comprising: winding at least one strip of commercial metal cloth in an overlaping spiral form to form a hollow member having an inner surface and an outer surface, bringing the outer surface into contact with a sintering support member having half-shells which enclose said wound strips, introducing ceramic beads into the cavity of the hollow member to create contact pressure between the hollow member and the half-shells, sintering the wound cloth and removing the sintered cloth from the support member.
Claim 3
Dependent Claim
17 words
A process accordIng to claim 1 wherein said strips of cloth have been rolled under a liquid.
Claim 4
Dependent Claim
15 words
A process according to claim 1 wherein said sintering support member comprises a ceramic material.
Claim 5
Dependent Claim
14 words
A process according to claim 3 wherein said ceramic material is aluminium oxide (Al2O3).
References Cited (Backward Citations)
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US3736641A
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |