US3811495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary heat exchangers in the form of turbines
Assignee: Individual
•
Filing: 1970-10-26
•
Granted: 1974-05-21
•
Expires: 1990-10-26
Abstract
Abstract A rotary heat exchanger, in which an internally circulating heat-carrying fluid thermally interacts with an external fluid of different temperature, is set in rotary motion by the kinetic force of either of these fluids acting upon a set of turbine blades on a rotary member carrying the heat-exchanging surfaces. In one embodiment, the rotary member forms a header centered on the axis of rotation and carries a set of axially extending tubes which communicate with the header at one end and are closed at the opposite end; the tubes are embraced by annular fins at locations remote from the header and are arrayed in a plurality of concentric groups, their lengths decreasing progressively from the outermost to the innermost group.
Inventors
- 👤 N Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08; F28; F28B; F28B1/00; F28B1/06; F28B1/08; F28D; F28D11/00; F28D11/02; F28D11/04; F28D15/00; F28F; F28F13/00; F28F13/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
A rotary heat exchanger comprising a hollow member mounted for rotation about an axis; conduit means for the circulation of a fluid through said body in heat-exchanging relationship with an external medium differing in temperature from said fluid, said body forming a rotary header for said fluid centered on said axis, said conduit means including a set of tubes substantially parallel to said axis extending outwardly from said header, said tubes being arrayed in a plurality of concentric groups with the length of said tubes decreasing progressively from the outermost group to the innermost group; and a multiplicity of annular fins centered on said axis, embracing said tubes and physically interconnecting same at locations remote from said header, said annular fins having inner radii increasing progressively in axial direction in conformity with the staggered length of said tubes.
Claim 2
Dependent Claim
138 words
A rotary heat exchanger comprising a hollow member mounted for rotation about an axis; conduit means for the circulation of a fluid through said body in heat-exchanging relationship with an external medium differing in temperature from said fluid, said body forming a rotary header for said fluid centered on said axis, said conduit means including a set of tubes substantially parallel to said axis extending outwardly from said header, said tubes being arrayed in a plurality of concentric groups with the length of said tubes decreasing progressively from the outermost group to the innermost group; and a multiplicity of annular fins centered on said axis, embracing said tubes and physically interconnecting same at locations remote from said header, said annular fins having inner radii increasing progressively in axial direction in conformity with the staggered length of said tubes.
Claim 3
Dependent Claim
18 words
A heat exchanger as defined in claim 1 wherein said tubes have closed ends remote from said header.
Claim 4
Dependent Claim
49 words
A heat exchanger as defined in claim 2 wherein said fluid is a vapor liquefiable by heat exchange with said external medium, said header extending radially beyond said tubes and forming a peripheral trough for collecting the liquefied fluid, said conduit means including discharge means terminating at said trough.
Claim 5
Dependent Claim
45 words
A heat exchanger as defined in claim 3, wherein said discharge means comprises at least one stationary pipe with an inlet in said trough facing in a peripheral direction opposite the direction of rotation of said member for scooping up the liquefied fliud collected therein.
Claim 6
Dependent Claim
16 words
A heat exchanger as defined in claim 1 wherein said annular fins have identical outer radii.
Claim 7
Dependent Claim
27 words
A heat exchanger as defined in claim 1 wherein the spacing of said fins along said axis decreases axially outwardly with the increase of their inner radii.
Claim 8
Dependent Claim
44 words
A heat exchanger as defined in claim 1 wherein said header is provided with turbine blades, further comprising inlet means for said fluid terminating within said body for training a stream of said fluid onto said turbine blades to impart rotation to said member.
Claim 9
Dependent Claim
27 words
A heat exchanger as defined in claim 7 wherein said inlet means comprises a stationary body provided with a peripheral array of nozzles confronting said turbine blades.
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |