US3814172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers
Assignee: SPX Flow Technology Crawley Ltd
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Filing: 1972-03-28
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Granted: 1974-06-04
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Expires: 1992-03-28
Abstract
Abstract A heat exchange apparatus and method of using it comprising periodically flexing flexible flat heat transfer plates so as to vary the cross section of the flow space, thereby achieving turbulence which promotes improved heat transfer. The variation in cross section may be obtained mechanically or through varying the pressure of the medium on one side of the plate.
Inventors
- 👤 D Shore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:42
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12; F28D; F28D9/00; F28D9/0087; F28F13/08; F28F13/10; F28F21/00; F28F21/06; F28F21/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A heat exchanger of the type comprising at least flow space for passage of a first liquid heat transfer medium in the form of a comparatively thin flat film, each flow space being bounded on at least one side by a substantially flat heat transfer plate which serves partially to define a flow space for a second or another heat transfer medium, means for periodically flexing said plate to give periodic variation in the cross section of one or more flow spaces, and a support system in tHe second medium flow space.
Claim 2
Dependent Claim
92 words
A heat exchanger of the type comprising at least flow space for passage of a first liquid heat transfer medium in the form of a comparatively thin flat film, each flow space being bounded on at least one side by a substantially flat heat transfer plate which serves partially to define a flow space for a second or another heat transfer medium, means for periodically flexing said plate to give periodic variation in the cross section of one or more flow spaces, and a support system in tHe second medium flow space.
Claim 3
Dependent Claim
17 words
A heat exchanger as claimed in claim 1, in which the flow spaces are sealed by gaskets.
Claim 4
Dependent Claim
27 words
A heat exchanger as claimed in claim 1, in which the flexing of the heat transfer plate is achieved by mechanical means operatively connected to said plate.
Claim 5
Dependent Claim
32 words
A heat exchanger as claimed in claim 1, in which said means for flexing said plate includes means for varying the hydraulic pressure of the medium on one side of said plate.
Claim 6
Dependent Claim
39 words
A heat exchanger as claimed in claim 4, in which the hydraulic pressure is the differential pressure between the flow spaces for the first and second heat transfer media and means is provided for cyclically varying this differential pressure.
Claim 7
Dependent Claim
26 words
A heat exchanger as claimed in claim 5, in which the cyclically varying means comprises a throttling system in at least one of said flow streams.
Claim 8
Dependent Claim
38 words
A heat exchanger as claimed in claim 6, in which the throttling system comprises two arms in parallel, one arm containing an adjustable valve, and the other arm containing an adjustable valve in series with an on-off valve.
Claim 9
Dependent Claim
22 words
A heat exchanger as claimed in claim 3, in which the heat transfer plates to be flexed are weakened at the edges.
Claim 10
Dependent Claim
20 words
A heat exchanger as claimed in claim 1, of a multi-pass type, comprising a non-return valve between each two passes.
References Cited (Backward Citations)
US2580149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |