US3762467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: Wabco Automotive UK Ltd
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Filing: 1971-10-26
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Granted: 1973-10-02
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Expires: 1991-10-26
Abstract
Abstract A spiral heat exchanger primarily for use as an oil cooler on commercial vehicles, such exchanger comprising spiral heat exchange means defining two separate fluid paths, and a casing surrounding said means and including respective end plates, each end plate having a respective spiral seating for location of adjacent end of the heat exchange spiral. The heat exchanger may incorporate a tubular oil filter arranged axially of the heat exchange means.
Inventors
- 👤 Yun Poon Siu
- 👤 K Quicke
- 👤 D Stratford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:00
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/04; F01; F01M; F01M11/00; F01M11/03; F01M5/00; F28D7/00; F28D7/04; F01M2011/031; F01M2011/033
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
A heat exchanger comprising a casing having an outer side wall and opposite end walls, annular heat exchange means within said casing seated at opposite ends on said end walls and surrounded by said side wall, said heat exchange means comprising means defining two separate substantially spiral passages that extend coextensively with a common heat conductive wall between them, a tubular filter in the space surrounded by said heat exchange means, means providing respective inlets and outlets for said passages in said casing walls, one of said inlets opening into said filter space which in turn is in fluid communication with an end of one of said passages.
Claim 2
Dependent Claim
108 words
A heat exchanger comprising a casing having an outer side wall and opposite end walls, annular heat exchange means within said casing seated at opposite ends on said end walls and surrounded by said side wall, said heat exchange means comprising means defining two separate substantially spiral passages that extend coextensively with a common heat conductive wall between them, a tubular filter in the space surrounded by said heat exchange means, means providing respective inlets and outlets for said passages in said casing walls, one of said inlets opening into said filter space which in turn is in fluid communication with an end of one of said passages.
Claim 3
Dependent Claim
39 words
A heat exchanger as claimed in claim 1, wherein said heat exchange means comprises a pair of spirally extending heat conductive walls and said body end walls are formed with spiral seatings for mounting the ends of said walls.
Claim 4
Dependent Claim
37 words
A heat exchanger as claimed in claim 2, wherein said heat exchange means comprises a plate formed with spirally extending corrugations of U-shaped cross-section, the folds of which mate with said seatings on the respective end walls.
Claim 5
Dependent Claim
64 words
A heat exchanger as claimed in claim 3, wherein said casing side wall is cylindrical with a respective one of the end walls removably secured thereon, said cylindrical wall being formed with a radial water inlet and a radial oil outlet, and one of said end walls being formed with a water outlet while the other end wall is provided with an oil inlet.
Claim 6
Dependent Claim
42 words
A heat exchanger as claimed in claim 1, wherein said filter is axially located with said casing and is biased against one of the end walls by a spring compressed between the other end wall and the adjacent end of the filter.
Claim 7
Dependent Claim
62 words
A heat exchanger as claimed in claim 1, wherein said heat exchange means comprises two spaced apart generally rectangular metal sheets connected together along their longitudinal edges and shaped to form an envelope-like hollow-plate construction open at both ends and said hollow-plate being wound into a spiral to define respectively an oil flow passage and a water flow passage through said means.
Claim 8
Dependent Claim
115 words
A heat exchanger as claimed in claim 6, wherein said casing comprises a cylindrical outer side wall having a respective one of the end walls secured to each end, said outer side wall being formed with a generally tubular portion whose axis extends generally parallel to the axis of said outer wall, said tubular portion having an oil outlet at one end and a water inlet at the other end, and one end wall being formed with an oil inlet while the other end wall is formed with a water ouTlet, said heat exchange means being connected to the inlets and outlets so as to form two completely separate passages through said heat exchange means.
Claim 9
Dependent Claim
45 words
A heat exchanger as claimed in claim 7, wherein said filter is axially located within said casing, and is biased against one end wall by a compression spring situated between the opposite end of the filter and a removable cover on the other end wall.
Claim 10
Dependent Claim
31 words
A heat exchanger as claimed in claim 6, wherein said metal sheets are provided with corrugations some of which contact the adjacent metal sheet to give increased strength to the spiral.
Claim 11
Dependent Claim
43 words
A heat exchanger as claimed in claim 7, wherein the oil inlet is connected to a central tube extending centrally of said filter provided with spaced apart apertures therein and positioned to promote an even distribution of the incoming oil through the filter.
Claim 12
Dependent Claim
34 words
A heat exchanger as claimed in claim 4, wherein heat transfer surface of the oil passage is increased by at least partially filling that passage with metal particles fused to the heat conductive walls.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |