US3881547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer device employing fins in a fluid stream
Assignee: Varian Medical Systems Inc
•
Filing: 1973-11-12
•
Granted: 1975-05-06
•
Expires: 1993-11-12
Abstract
Abstract The heat exchanger comprises a device coupled in heat exchanging relation with a fluid stream by means of an arcuate array of radially directed, circumferentially spaced, thermally conductive fins with the mean plane of each fin being generally parallel of the axis of revolution of the arcuate array. The fins are corrugated into a wave-like geometry, with the waves increasing in amplitude with increase in radial distance from the axis of revolution, and with the wave fronts running generally laterally to the axis of revolution of the array. The fluid stream flows between adjacent fins in a serpentine path through the array in the axial direction.
Inventors
- 👤 Gordon R Lavering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:17
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; H01J23/033; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
213 words
In a heat transfer apparatus for transferring heat between a device and a stream of fluid wherein said device comprises an elongate member and a sleeve surrounding said elongate member and where said stream of fluid flows between said elongate member and said surrounding sleeve member an arcuate array of circumferentially-spaced thermallyconductive fins coupled in heat-exchanging relationship with said elongate member and extending outwardly therefrom, each of said fins being corrugated into a wave-like configuration, the mean plane of the wave-like configuration of each of said fins being generally parallel to the axis of revolution of said arcuate array; the wave amplitude of said wave-like configuration increasing with increase in radial distance along said mean plane outward from said axis of revolution of said array; the wave fronts of said wave-like configuration for each of said fins running generally laterally of said axis of revolution of said array to accommodate the flow of coolant fluid along serpentine paths between adjacent ones of said fins parallel to said axis of revolution so that coolant fluid flowing between adjacent fins in proximity to the outer perimeter of said array of fins traverses a flow path which is longer than the flow path for coolant fluid flowing nearer to said axis of revolution of said array.
Claim 2
Dependent Claim
213 words
In a heat transfer apparatus for transferring heat between a device and a stream of fluid wherein said device comprises an elongate member and a sleeve surrounding said elongate member and where said stream of fluid flows between said elongate member and said surrounding sleeve member an arcuate array of circumferentially-spaced thermallyconductive fins coupled in heat-exchanging relationship with said elongate member and extending outwardly therefrom, each of said fins being corrugated into a wave-like configuration, the mean plane of the wave-like configuration of each of said fins being generally parallel to the axis of revolution of said arcuate array; the wave amplitude of said wave-like configuration increasing with increase in radial distance along said mean plane outward from said axis of revolution of said array; the wave fronts of said wave-like configuration for each of said fins running generally laterally of said axis of revolution of said array to accommodate the flow of coolant fluid along serpentine paths between adjacent ones of said fins parallel to said axis of revolution so that coolant fluid flowing between adjacent fins in proximity to the outer perimeter of said array of fins traverses a flow path which is longer than the flow path for coolant fluid flowing nearer to said axis of revolution of said array.
Claim 3
Dependent Claim
55 words
The apparatus of claim 1 wherein said elongate member is a beam collector structure of an electron tube, said fins being cooling fins for transfer of heat from said collector to said fluid stream, and wherein the amplitude of said wave-like configuration is substantially zero at the innermost radial extent of each of said fins.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 wherein said fins are made of copper sheets of generally uniform thickness.
Claim 5
Dependent Claim
54 words
The apparatus of claim 1 wherein the wave crests of said wave-like configuration in adjacent ones of said fins are in registration with each other such that the spacing between adjacent fins at a given radius from the axis of revolution of the array is substantially uniform for all the fins in the array.
Claim 6
Dependent Claim
10 words
The apparatus of claim 1 wherein said fins are imperforate.
Claim 7
Dependent Claim
17 words
The apparatus of claim 2, wherein said fins are made from aluminum sheets of generally uniform thickness.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |