Patent US3735588A successfully refreshed from Google Patents.
US3735588A
Expired / Lapsed
US
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Heat exchanger leakage baffle and positioning means
Assignee: Curtiss Wright Corp
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Filing: 1971-07-21
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Granted: 1973-05-29
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Expires: 1991-07-21
Abstract
Abstract A heat exchanger comprising serpentine finned tubes disposed in an annular configuration, with means for positioning and supporting the unfinned return bends of the tubing with a porous refractory composition in such a manner as to prevent the external heat transfer fluid from bypassing the finned portions and to prevent leakage of hazardous internal fluid from the tubes, while allowing movement of the tubing in thermal expansion.
Inventors
- 👤 S Moskowitz
- 👤 J Horvath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:13
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/08; F28D7/082; F28D7/085; F28F; F28F9/00; F28F9/005; F28F9/007; F28F9/013
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
The combination recited in claim 1, wherein the porous potting material is formed of ceramic fibers having the approximate chemical composition of 50.9 percent Al2O3, 46.8 percent SiO2, 1.2 percent B2O3, and 0.8 percent Na2O.
Claim 2
Dependent Claim
21 words
The combination recited in claim 2, wherein the tubing bends of a plurality of passes are potteD in a unitary packing.
Claim 3
Dependent Claim
19 words
The combination recited in claim 2, wherein each pass of tubing is potted separately, allowing thermal movement between passes.
Claim 4
Dependent Claim
28 words
The combination recited in claim 2, wherein each pass of tubing is serpentined in the longitudinal direction into a plurality of bights extending in a generally radial direction.
Claim 5
Dependent Claim
48 words
The combination recited in claim 2, wherein each pass of tubing is serpentined into a plurality of semicircular bights extending in the circumferential direction to form an annular heat exchanger separable on a diametral plane, with the potted return bends of the tubing positioned at the meeting plane.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |