US3848314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An assembly of substantially parallel metallic surfaces
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1972-10-24
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Granted: 1974-11-19
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Expires: 1992-10-24
Abstract
Abstract Parallel plates having a very small relative spacing and assembled in a stack so as to constitute a heat-insulating structure are joined together in pairs by means of connecting bridges formed by electronic beam welding. The bridges are formed from the exterior of the assembled plates by controlled collapse in the beam impact zone so as to produce metallurgical bonds across the spaces provided between the plates. Said bridges extend along lines defining closed compartments between the plates and a vacuum is maintained therein for the welding process.
Inventors
- 👤 J Stohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:34
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/08; B; B23; B23K; B23K15/00; B23K15/0046; G; G21; G21C; G21C11/00; G21C11/08; G21C11/083; G21C11/085; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12486
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A HEAT-INSULATING STRUCTURE COMPRISING A STACK OF SPACING, SUBSTANTIALLY PARALLEL PLATES HAVING A SMALL RELATIVE SPACING, CONNECTING BRIDGES FORMED BY ELECTRON BEAM WELDING OF SAID PLATES JOINING SAID PLATES IN PAIRS, SAID BRIDGES DEFINING CLOSED COMPARTMENTS UNDER VACUUM BETWEEN SAID PLATES, THE VACUUM REQUIRED FOR THE WELDING OPERATIONS BEING MAINTAINED WITHIN SAID COMPARTMENTS AT LEAST ONE SPACING SYSTEM MOUNTED BWETWEEN EACH PAIR OF SAID PLATES, SAID SPACING SYSTEM BEING A WIRE MESH TRELLIS, SAID TRELLIS BEING ATTACHED TO SAID PLATES AT THE INTERSECTION OF SAID WIRES.
Claim 2
Dependent Claim
86 words
A HEAT-INSULATING STRUCTURE COMPRISING A STACK OF SPACING, SUBSTANTIALLY PARALLEL PLATES HAVING A SMALL RELATIVE SPACING, CONNECTING BRIDGES FORMED BY ELECTRON BEAM WELDING OF SAID PLATES JOINING SAID PLATES IN PAIRS, SAID BRIDGES DEFINING CLOSED COMPARTMENTS UNDER VACUUM BETWEEN SAID PLATES, THE VACUUM REQUIRED FOR THE WELDING OPERATIONS BEING MAINTAINED WITHIN SAID COMPARTMENTS AT LEAST ONE SPACING SYSTEM MOUNTED BWETWEEN EACH PAIR OF SAID PLATES, SAID SPACING SYSTEM BEING A WIRE MESH TRELLIS, SAID TRELLIS BEING ATTACHED TO SAID PLATES AT THE INTERSECTION OF SAID WIRES.
Claim 3
Dependent Claim
39 words
A structure according to claim 1, wherein the wires of the spacing system are provided with a coating of material having low heat conductivity such as an oxide which is stable at the temperatures of utilization of the structure.
Claim 4
Dependent Claim
32 words
A structure according to claim 1, wherein said compartments between said plates provide free passageways for elements such as pipes passing through the structure without thEreby impairing the leak-tightness of said compartments.
Claim 5
Dependent Claim
44 words
A structure according to claim 1, wherein said connecting bridges of said compartments between a given plate and the preceding plate in the structure are relatively displaced with respect to said connecting bridges of the compartments between said given plate and the following plate.
References Cited (Backward Citations)
US2829238A
Cited
GB908726A
Cited
US3185815A
Cited
US3458683A
Cited
US3486218A
Cited
GB1228896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |