US3602296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic flue recuperators
Assignee: Thermal Transfer Corp
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Filing: 1969-09-30
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Granted: 1971-08-31
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Expires: 1989-09-30
Abstract
Abstract An interchangeable top and bottom support tube type recuperator is provided having a bottom manifold with a plurality of vertical tubes fixed thereto in communication therewith, a top manifold having a plurality of openings slidably receiving the tubes, a retainer ring fixed to a plurality of said tubes within the top manifold and a flexible expansion compensator sheet sealingly engaging the top ends of the tubes and the manifold within the manifold.
Inventors
- 👤 Fred M Heyn
- 👤 Robert C Schreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:48
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; F28F9/26; F28F2265/00; F28F2265/26; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/053; Y10S165/058
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
In a recuperator having a chamber traversed by combustion gases and in which is disposed a plurality of tubes the improvement comprising; a bottom manifold, said tubes fixed at one end to said bottom manifold and communicating therewith, a top manifold having openings slidably receiving the said plurality of vertical tubes, a tube retainer ring fixed adjacent the top end of at least a part of said vertical tubes within the top manifold limiting the movement of the tubes in the openings in the top manifold, and a flexible expansion compensator sheet sealingly fixed around the ends of the vertical tubes within the top manifold sealing the manifold against loss through the holes in the top manifold.
Claim 2
Dependent Claim
117 words
In a recuperator having a chamber traversed by combustion gases and in which is disposed a plurality of tubes the improvement comprising; a bottom manifold, said tubes fixed at one end to said bottom manifold and communicating therewith, a top manifold having openings slidably receiving the said plurality of vertical tubes, a tube retainer ring fixed adjacent the top end of at least a part of said vertical tubes within the top manifold limiting the movement of the tubes in the openings in the top manifold, and a flexible expansion compensator sheet sealingly fixed around the ends of the vertical tubes within the top manifold sealing the manifold against loss through the holes in the top manifold.
Claim 3
Dependent Claim
25 words
A recuperator as claimed in claim 1 wherein a tube retainer ring is welded to each tube adjacent the top end within the top manifold.
Claim 4
Dependent Claim
18 words
A recuperator as claimed in claim 1 wherein the top manifold is provided with horizontally extending support lugs.
Claim 5
Dependent Claim
45 words
A recuperator as claimed in claim 1 wherein the bottom manifold is provided with a support sheet forming the top surface thereof, said support sheet having a plurality of rows of parallel spaced openings within which the bottOm end of the vertical tubes is fixed.
Claim 6
Dependent Claim
46 words
A recuperator as claimed in claim 1 wherein the top manifold is provided with a support sheet forming the bottom surface thereof, said support sheet having a plurality of rows of parallel spaced openings within which the top ends of the vertical tubes are freely slidable.
Claim 7
Dependent Claim
46 words
A recuperator as claimed in claim 4 wherein the top manifold is provided with a support sheet forming the bottom surface thereof, said support sheet having a plurality of rows of parallel spaced openings within which the top ends of the vertical tubes are freely slidable.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |