Patent US4294659A successfully refreshed from Google Patents.
US4294659A
Expired / Lapsed
US
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Apparatus for use in a liquid alkali metal environment
Assignee: Ricardo AEA Ltd
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Filing: 1978-01-16
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Granted: 1981-10-13
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Expires: 1998-01-16
Abstract
Abstract Heat exchange apparatus for use in a liquid metal environment comprising heat exchange tubes and grid plates having complementary bearing surfaces. The tubes are of stainless steel and the complementary bearing surfaces of the grids are aluminized to reduce wear and friction.
Inventors
- 👤 Charles S. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:55
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/082; F22; F22B; F22B1/00; F22B1/02; F22B1/06; F22B1/063; F28F9/00; F28F9/007; F28F9/013; F28F9/0131; G; G21; G21C; G21C3/00; G21C3/30; G21C3/32; G21C3/34; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
Heat exchange apparatus for use in a liquid alkali metal environment comprising, a bundle of spaced heat exchange tubes of stainless steal, a tubular shell housing the tubes and adapted by inlet and outlet ports for conducting liquid alkali metal therethrough in heat exchange with the tubes, and a plurality of cellular grids laterally supporting the tubes in the shell, each tube slidably occupying a discrete cell of each grid and wherein the complementary bearing surfaces of the grids for the tubes are aluminised.
Claim 2
Dependent Claim
84 words
Heat exchange apparatus for use in a liquid alkali metal environment comprising, a bundle of spaced heat exchange tubes of stainless steal, a tubular shell housing the tubes and adapted by inlet and outlet ports for conducting liquid alkali metal therethrough in heat exchange with the tubes, and a plurality of cellular grids laterally supporting the tubes in the shell, each tube slidably occupying a discrete cell of each grid and wherein the complementary bearing surfaces of the grids for the tubes are aluminised.
Claim 3
Dependent Claim
87 words
Heat exchange apparatus for use in a liquid alkali metal environment comprising, a bundle of spaced heat exchange tubes of stainless steel, a tubular shell housing the tubes and adapted by inlet and outlet ports for conducting liquid alkali metal therethrough in heat exchange with the tubes, and a plurality of cellular grids laterally supporting the tubes in the shell, each tube slidably occupying a discrete cell of each grid and wherein the complementary bearing surfaces of the grids for the tubes comprise aluminized nickel base alloy.
Claim 4
Dependent Claim
87 words
Heat exchange apparatus for use in a liquid alkali metal environment comprising, a bundle of spaced heat exchange tubes of stainless steel, a tubular shell housing the tubes and adapted by inlet and outlet ports for conducting liquid alkali metal therethrough in heat exchange with the tubes, and a plurality of cellular grids laterally supporting the tubes in the shell, each tube slidably occupying a discrete cell of each grid and wherein the complementary bearing surfaces of the grids for the tubes comprise aluminized nickel base alloy.
Claim 5
Dependent Claim
99 words
Heat exchange apparatus for use in a liquid alkali metal environment comprising, a bundle of spaced heat exchange tubes of stainless steel, a tubular shell housing the tubes and adapted by inlet and outlet ports for conducting liquid alkali metal therethrough in heat exchange with the tubes, and a plurality of cellular grids laterally supporting the tubes in the shell, each tube slidably occupying a discrete cell of each grid and each cell of said grids including a bush of nickel base alloy, each bush having an aluminized bore providing the complementary bearing surface for a heat exchange tube.
Claim 6
Dependent Claim
99 words
Heat exchange apparatus for use in a liquid alkali metal environment comprising, a bundle of spaced heat exchange tubes of stainless steel, a tubular shell housing the tubes and adapted by inlet and outlet ports for conducting liquid alkali metal therethrough in heat exchange with the tubes, and a plurality of cellular grids laterally supporting the tubes in the shell, each tube slidably occupying a discrete cell of each grid and each cell of said grids including a bush of nickel base alloy, each bush having an aluminized bore providing the complementary bearing surface for a heat exchange tube.
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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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |