US3893509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lap joint tube plate heat exchanger
Assignee: Garrett Corp
•
Filing: 1974-04-08
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Granted: 1975-07-08
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Expires: 1994-04-08
Abstract
Abstract A heat exchanger formed of a series of plates which are spaced apart to form adjacent flow passages for conducting hot gas through passages and cold gas through adjacent alternate passages. Intermediate portions of the plates have opposing edges bent in overlapping relation with adjacent plates so that the bent edges not only seal the spaces between adjacent plates, but also serve to maintain the spacing between the plates at the intermediate portion of the heat exchanger. Manifold portions of the plates at one end of the heat exchanger are joined together to form inlet passage portions for the hot gas alternate passages and outlet passage portions for the cold gas alternate passages. Similarly, at the other end of the heat exchanger manifold portions of the plates are joined together to form outlet passage portions for the hot gas alternate passages, and inlet passage portions for the cold gas alternate passages.
Inventors
- 👤 David L Satchwell
- 👤 Uriel F Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:45
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/10; F28D; F28D9/00; F28D9/0031; F28D9/0037; F28F2250/00; F28F2250/10; F28F2250/108; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/373; Y10S165/382
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A counter-flow plate type heat exchanger for two fluid media comprising: a plurality of alternately stacked first and second plates, each plate having substantially triangular end portions with first and second adjacent sides each defining edges, and third sides interconnected by a substantially rectangular intermediate portion having opposing edges; depending flanges on said opposing edges of said first plates, said flanges including upper and lower first plate flange portions offset from each other to provide a shoulder; depending flanges on said opposing edges of said second plates, said second plate flanges including upper and lower second plate flange portions offset from each other to provide a shoulder, the plurality of alternately stacked first and second plates being arranged such that second plate lower flange portions overlap said first plate upper flange portions and said first plate lower flange portions overlap said second plate upper flange portions; means integral with each firsT and second plate for sealing said first side edges of adjacent triangular end portions of each first plate and one of the two adjacent second plates at each said triangular end portion to form fluid inlet and outlet passage portions for one fluid medium, and; means integral with each first and second plate for sealing said second side edges of adjacent triangular end portions of each first plate and the other of the two adjacent second plates at each said triangular end to form fluid inlet and outlet passage portions for the other fluid medium.
Claim 2
Dependent Claim
246 words
A counter-flow plate type heat exchanger for two fluid media comprising: a plurality of alternately stacked first and second plates, each plate having substantially triangular end portions with first and second adjacent sides each defining edges, and third sides interconnected by a substantially rectangular intermediate portion having opposing edges; depending flanges on said opposing edges of said first plates, said flanges including upper and lower first plate flange portions offset from each other to provide a shoulder; depending flanges on said opposing edges of said second plates, said second plate flanges including upper and lower second plate flange portions offset from each other to provide a shoulder, the plurality of alternately stacked first and second plates being arranged such that second plate lower flange portions overlap said first plate upper flange portions and said first plate lower flange portions overlap said second plate upper flange portions; means integral with each firsT and second plate for sealing said first side edges of adjacent triangular end portions of each first plate and one of the two adjacent second plates at each said triangular end portion to form fluid inlet and outlet passage portions for one fluid medium, and; means integral with each first and second plate for sealing said second side edges of adjacent triangular end portions of each first plate and the other of the two adjacent second plates at each said triangular end to form fluid inlet and outlet passage portions for the other fluid medium.
Claim 3
Dependent Claim
25 words
The heat exchanger of claim 1 further comprising: outwardly extending inversion portions located on said first and second plate lower flange portions for providing stiffness.
Claim 4
Dependent Claim
83 words
The heat exchanger of claim 1 wherein said means for sealing said first side edges of adjacent triangular end portions of each first plate and one of the two adjacent second plates comprises: up-slope and adjacent level edge portions on said first side edges of each second plate; and a tab on each said first side edge of each of said first plates, said tab operable to be bent over said level edge portion of the one of the two adjacent second plates.
Claim 5
Dependent Claim
98 words
The heat exchanger of claim 1 wherein said means for sealing said second side edges of adjacent triangular end portions of each first plate and the other of the two adjacent second plates comprises: down-slope and adjacent level edge portions on said second side edges of each second plate; and up-slope and adjacent level edge portions on said second side edges of each first plate; a tab on each said level edge portions of each first plate, said tab being operable to be bent over said level edge portions of the other of the two adjacent second plates.
Claim 6
Dependent Claim
48 words
The heat exchanger of claim 1 further comprising: ribs on the triangular end portions of each first plate, said ribs projecting into the inlet and outlet passage portions for guiding flow of a fluid medium between regions adjacent said second and third sides of the triangular end portions.
Claim 7
Dependent Claim
26 words
The heat exchanger of claim 1 further comprising: fins positioned between intermediate portions of adjacent first and second plates for conducting heat between the fluid media.
Claim 8
Dependent Claim
269 words
A counter-flow plate type heat exchanger for two fluid media comprising: a plurality of alternately stacked first and second plates, each plate having substantially triangular end portions with first and second adjacent sides each defining edges, and third sides interconnected by a substantially rectangular intermediate portion having opposing edges; depending flanges on opposing edges of said first plates, said flanges including upper and lower first plate flange portions offset from each other to provide a shoulder; depending flanges on opposing edges of said second plates, said second plate flanges including upper and lower second plate flange portions offset from each other to provide a shoulder, the plurality of alternately stacked first and second plates arranged such that second plate lower flange portions overlap said first plate upper flange portions and said first plate lower flange portions overlap said second plate upper flange portions; outwardly extending inversion portions located on said first and second plate lower flange portions; up-slope and adjacent level edge portions on said first side edges of each second plate; a tab on each said first side edge of each of said first plates, said tab being operable to be bent over said level edge portion of one of the two adjacent second plates; down-slope and adjacent level edge portions on said second side edges of each second plate; up-slope and adjacent level edge portions on said second side edges of each plate; and a tab on each said level edge portions of each first plate, said tab being operable to be bent over said level edge portions of the other of the two adjacent second plates.
Claim 9
Dependent Claim
269 words
A counter-flow plate type heat exchanger for two fluid media comprising: a plurality of alternately stacked first and second plates, each plate having substantially triangular end portions with first and second adjacent sides each defining edges, and third sides interconnected by a substantially rectangular intermediate portion having opposing edges; depending flanges on opposing edges of said first plates, said flanges including upper and lower first plate flange portions offset from each other to provide a shoulder; depending flanges on opposing edges of said second plates, said second plate flanges including upper and lower second plate flange portions offset from each other to provide a shoulder, the plurality of alternately stacked first and second plates arranged such that second plate lower flange portions overlap said first plate upper flange portions and said first plate lower flange portions overlap said second plate upper flange portions; outwardly extending inversion portions located on said first and second plate lower flange portions; up-slope and adjacent level edge portions on said first side edges of each second plate; a tab on each said first side edge of each of said first plates, said tab being operable to be bent over said level edge portion of one of the two adjacent second plates; down-slope and adjacent level edge portions on said second side edges of each second plate; up-slope and adjacent level edge portions on said second side edges of each plate; and a tab on each said level edge portions of each first plate, said tab being operable to be bent over said level edge portions of the other of the two adjacent second plates.
Claim 10
Dependent Claim
51 words
The heat exchanger of claIm 7 further comprising: ribs on the triangular end portions of each first plate projecting toward the triangular end portions of the one of the two adjacent second plates, said ribs extending intermediate said second and third sides of said first and second plate triangular end portions.
Claim 11
Dependent Claim
20 words
The heat exchanger of claim 8 further comprising: fins positioned between said intermediate portions of said first and second plates.
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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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |