US3759323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
C-flow stacked plate heat exchanger
Assignee: Caterpillar Inc
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Filing: 1971-11-18
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Granted: 1973-09-18
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Expires: 1991-11-18
Abstract
Abstract A primary surface plate-type heat exchanger has sheets with triangular zones on opposite sides of a central rectangular area stacked alternately to provide a C-shaped flow path for two fluids. Corrugations in the sheet surface serve to direct fluid flow and to support adjacent sheets.
Inventors
- 👤 D Keedy
- 👤 E Mangus
- 👤 H Dawson
- 👤 W Hoftiezer
- 👤 E Patton
- 👤 J Grandfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08; F02C7/10; F02C7/105; F28; F28D; F28D9/00; F28D9/0062; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/387
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
A primary surface heat exchanger comprising first and second sheets alternately arranged to form a stack, said sheets each having a corrugated central rectangular area with opposite sides and ends, and triangular-shaped areas having first and second edges and a base coincident with each of said rectangular area sides, portions of adjacent sheets abutting to provide structural support for said sheets and to maintain generally uniform flow paths between the sheets, said first and second edges of said triangular-shaped areas forming acute angles with the adjacent side of the rectangular area, side sheets defining therebetween a first C-shaped fluid flow path entering and exiting between said first edges of the triangular-shaped areas for travel across said rectangular area from side to side, and a second C-shaped fluid flow path immediately adjacent said first flow path in the stack and entering and exiting between said second edges for travel across said rectangular area from side to side in substantially counter-flow relation to said first flow path.
Claim 2
Dependent Claim
165 words
A primary surface heat exchanger comprising first and second sheets alternately arranged to form a stack, said sheets each having a corrugated central rectangular area with opposite sides and ends, and triangular-shaped areas having first and second edges and a base coincident with each of said rectangular area sides, portions of adjacent sheets abutting to provide structural support for said sheets and to maintain generally uniform flow paths between the sheets, said first and second edges of said triangular-shaped areas forming acute angles with the adjacent side of the rectangular area, side sheets defining therebetween a first C-shaped fluid flow path entering and exiting between said first edges of the triangular-shaped areas for travel across said rectangular area from side to side, and a second C-shaped fluid flow path immediately adjacent said first flow path in the stack and entering and exiting between said second edges for travel across said rectangular area from side to side in substantially counter-flow relation to said first flow path.
Claim 3
Dependent Claim
36 words
The invention of claim 1 including seal means attached to said first and second sheets to seal appropriate edges of said sheets and to form noncommunicating fluid passages and to provide structural support for said stack.
Claim 4
Dependent Claim
52 words
The invention of claim 1 wherein said central rectangular area further comprises corrugations which are chevron-shaped and have crowns and valleys arranged in ranks and aligned so that crowns of said corrugations in said first sheets contact valleys of said corrugations of said second sheets, thus providing structural support for said sheets.
Claim 5
Dependent Claim
52 words
The invention of claim 1 wherein said central rectangular area further comprises corrugations which are wave-shaped and have crowns and valleys arranged in ranks and aligned so that crowns of said corrugations in said first sheets contact valleys of said corrugations of said second sheets, thus providing structural support for said sheets.
Claim 6
Dependent Claim
40 words
The invention of claim 1 wherein said central rectangular area further comprises straight corrugations which are arranged in ranks and aligned so that said corrugations of said first sheet are skewed in relationship to said corrugations of said second sheet.
Claim 7
Dependent Claim
20 words
The invention of claim 1 wherein said triangular-shaped areas have dimples embossed thereon to provide structural support for said sheets.
Claim 8
Dependent Claim
25 words
The invention of claim 1 further comprising At least two triangular-shaped corrugated sheets coincident with the triangular-shaped areas, thus providing structural support for said sheets.
Claim 9
Dependent Claim
14 words
The invention of claim 1 wherein the corrugated sheets are made of nonmetallic material.
References Cited (Backward Citations)
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |