US3727681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge type tube and fin heat exchanger
Assignee: United Aircraft Products Inc
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Filing: 1971-06-17
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Granted: 1973-04-17
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Expires: 1991-06-17
Abstract
Abstract A true counterflow heat exchanger of the tube and fin type having a cartridge design in accordance with which the heat exchanger unit may be removably installed in a housing cavity while retaining its counterflow principle of operation. A manifold member at an inner end of the unit is formed for free flow of a first fluid therethrough and for confined flow of a second fluid to receive such second fluid and return it to the opposite or outer end of the unit.
Inventors
- 👤 J Fernandes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:40
CPC Classifications
F; F28; F28F; F28F9/00; F28D; F28D7/00; F28D7/0041; F28F1/00; F28F1/02; F28F1/04; F28F1/045; F28F1/10; F28F1/12; F28F2280/00; F28F2280/02; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405; Y10S165/413
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
228 words
A cartridge design true counterflow heat exchanger of the tube and fin type, comprising a pair of spaced apart header plates, tube means interconnecting said plates and having ends opening therethrough, said tube means disposing in a parallel spaced apart relation, corrugated fin strip means interposed between said tube means and orienting to have its corrugations extend lengthwise of the tube means toward said header plates, one end of the fin strip means substantially abutting one of said header plates and the other end being longitudinally spaced from the other one of said plates, said one header plate having openings for flow of a first fluid therethrough, said fin strip means defining a flow path for said first fluid opening at one end through said openings in said one header plate and terminating at its other end beyond said other end of said fin strip means in a space defined by said other end of said fin strip means and by said other header plate, said space being open to the exterior of the heat exchanger, and manifold members mounting to said header plates, the one thereof mounting to said one header plate having openings aligning with the said openings in said one header plate and having in alternating relation therewith passages aligning and communicating with the ends of said tube means opening through said one header plate.
Claim 2
Dependent Claim
228 words
A cartridge design true counterflow heat exchanger of the tube and fin type, comprising a pair of spaced apart header plates, tube means interconnecting said plates and having ends opening therethrough, said tube means disposing in a parallel spaced apart relation, corrugated fin strip means interposed between said tube means and orienting to have its corrugations extend lengthwise of the tube means toward said header plates, one end of the fin strip means substantially abutting one of said header plates and the other end being longitudinally spaced from the other one of said plates, said one header plate having openings for flow of a first fluid therethrough, said fin strip means defining a flow path for said first fluid opening at one end through said openings in said one header plate and terminating at its other end beyond said other end of said fin strip means in a space defined by said other end of said fin strip means and by said other header plate, said space being open to the exterior of the heat exchanger, and manifold members mounting to said header plates, the one thereof mounting to said one header plate having openings aligning with the said openings in said one header plate and having in alternating relation therewith passages aligning and communicating with the ends of said tube means opening through said one header plate.
Claim 3
Dependent Claim
24 words
A heat exchanger according to claim 1, characterized by a manifold chamber in said one manifold member in common communication with said passages therein.
Claim 4
Dependent Claim
43 words
A heat exchanger according to claim 2, characterized by return conduit means extending from said chamber in said one manifold member at one end of the heat exchanger in parallel relation to said tube means to the opposite end of the heat exchanger.
Claim 5
Dependent Claim
31 words
A heat exchanger according to claim 3, wherein said tubular means comprises a manifold tube and openings in said header plates in which the ends of said manifold tube are installed.
Claim 6
Dependent Claim
37 words
A heat exchanger according to claim 4, wherein the manifold member mounting to said other header plate has a manifold chamber in common communication with the ends of the tube means opening through said other header plate.
Claim 7
Dependent Claim
59 words
A heat exchanger according to claim 2, wherein said header plates have relatively narrow elongated slots receiving the ends of said tube means, said tube means having a corresponding configuration to interfit in said slots, the said openings in said one header plate being elongated in the same sense as said slots therein and being in alternating relation thereto.
Claim 8
Dependent Claim
84 words
A heat exchanger according to claim 6, wherein the manifold member mounting to said one header plate has spaced apart projecting portions aligning with said tube means, said passages being formed in said projecting portions and opening through an inner face of said member to register with the slots in said one header plate, the said openings in the manifold member mounting to said one header plate appearing intermediate said projections, said projections defining entrance or exit means for flow of said first fluid.
Claim 9
Dependent Claim
44 words
A heat exchanger according to claim 1, wherein said fin strip is secured to said tube means by means constituting a seal and a bond whereby to preclude by-passing flow of said first fluid laterally of said fin strip means except at said space.
Claim 10
Dependent Claim
171 words
A heat exchanger core, comprising means defining a series of laterally spaced apart tube means, each tube means presenting an expansive wall on its opposite sides, fin strip means overlying said expansive walls and held in substantially compressive contact between opposite walls of adjacent tube means, a pair of header plates each having a series of spaced apart slots accommodating the ends of said tube means and at least one of said header plates having another series of openings therein in alternating relation to said slots, said fin strip means orienting to have its corrugations extend lengthwise of said tube means toward said header plates and having an end thereof in substantially end abutting relation to said one header plate, and means effecting a sealing engagement of individual fin corrugations to the walls of said tube means and to said one header plate, a fluid flowing lengthwise of said fin strip means to enter or exit at said other series of openings being denied by-passing flow laterally of said strip means.
Claim 11
Dependent Claim
171 words
A heat exchanger core, comprising means defining a series of laterally spaced apart tube means, each tube means presenting an expansive wall on its opposite sides, fin strip means overlying said expansive walls and held in substantially compressive contact between opposite walls of adjacent tube means, a pair of header plates each having a series of spaced apart slots accommodating the ends of said tube means and at least one of said header plates having another series of openings therein in alternating relation to said slots, said fin strip means orienting to have its corrugations extend lengthwise of said tube means toward said header plates and having an end thereof in substantially end abutting relation to said one header plate, and means effecting a sealing engagement of individual fin corrugations to the walls of said tube means and to said one header plate, a fluid flowing lengthwise of said fin strip means to enter or exit at said other series of openings being denied by-passing flow laterally of said strip means.
Claim 12
Dependent Claim
81 words
A heat exchanger core according to claim 9, wherein said fin strip means is at one end in substantially end abutting contact with one of said header plates and at its other end is in a spaced relation to the other header plate, the space between said other header plate and the said other end of said fin strip means constituting a transverse flow spaced for the fluid entering or exiting the core by way of said other series of openings.
Claim 13
Dependent Claim
57 words
A heat exchanger according to claim 1, wherein said tube means comprises a plurality of tubes with respect to which corrugated fin strip means is in a sandwiched relation, said header plates having separate opposing slots for each tube and the said openings in said one header plate substantially aligning with ends of said fin strip means.
Claim 14
Dependent Claim
49 words
A heat exchanger according to claim 11, wherein each tube is comprised of a plurality of tube elements stacked one upon another, adjacent elements presenting broad flat surfaces for contact with one another and combining to define substantially continuous expansive side surfaces for contact with said fin strip means.
Claim 15
Dependent Claim
42 words
A heat exchanger according to claim 11, wherein each tube is comprised of a single tube flattened to a laterally elongated shape for end accommodation in said slots and unitarily to define expansive side surfaces for contact with said fin sTrip means.
Claim 16
Dependent Claim
32 words
A heat exchanger according to claim 11, wherein each tube is comprised of opposing spaced apart plate elements and an intervening fin strip, said plate elements and fin strip being bonded together.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |