Patent US3732029A successfully refreshed from Google Patents.
US3732029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact heat exchanger
Assignee: Westinghouse Electric Corp
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Filing: 1971-12-14
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Granted: 1973-05-08
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Expires: 1991-12-14
Abstract
Abstract The heat transfer efficiency of a heat exchanger is increased by making the entire flow pattern of the exchanger a straightthrough flow pattern, thereby providing a compact heat exchanger which is substantially 100 percent effective and compact in size. Thus, the required cooling effect is accomplished with an exchanger which is smaller in size than a prior exchanger and has a reduced cost.
Inventors
- 👤 J Raymond
- 👤 C Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:35
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; F04D29/58; F04D29/586; F04D29/588; F04D7/00; F04D7/02; F04D7/06; F28; F28D; F28D7/00; F28D7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
210 words
An annular heat exchanger for use with a centrifugal pump having an impeller driven by a shaft rotatably mounted in a generally cylindrical casing, comprising first and second seal means spaced along the shaft inside the casing, an annular compartment defined by a first wall surrounding the shaft, a second wall surrounding the shaft and spaced along the shaft from the first wall, at least one cooling tube disposed within the compartment, a first header in the first wall with a disc-like distribution plate having a series of holes therein, the area of the holes increasing as the distance to the center line of the shaft increases, a second header in the second wall similar to the first header, said first wall having first passageways therein extending from the first header to the shaft at said first seal means, said second wall having second passageways therein extending from the second header to the shaft at said second seal means, means causing part of the fluid circulated by the impeller to flow into the exchanger compartment through said first passageways and said first header at a uniform flow rate, and said second header permitting the fluid to flow out of the compartment through said second passageways at a uniform flow rate.
Claim 2
Dependent Claim
210 words
An annular heat exchanger for use with a centrifugal pump having an impeller driven by a shaft rotatably mounted in a generally cylindrical casing, comprising first and second seal means spaced along the shaft inside the casing, an annular compartment defined by a first wall surrounding the shaft, a second wall surrounding the shaft and spaced along the shaft from the first wall, at least one cooling tube disposed within the compartment, a first header in the first wall with a disc-like distribution plate having a series of holes therein, the area of the holes increasing as the distance to the center line of the shaft increases, a second header in the second wall similar to the first header, said first wall having first passageways therein extending from the first header to the shaft at said first seal means, said second wall having second passageways therein extending from the second header to the shaft at said second seal means, means causing part of the fluid circulated by the impeller to flow into the exchanger compartment through said first passageways and said first header at a uniform flow rate, and said second header permitting the fluid to flow out of the compartment through said second passageways at a uniform flow rate.
Claim 3
Dependent Claim
26 words
The annular heat exchanger defined in claim 1, including radially spaced inner and outer sleeves extending parallel to the shaft between said first and second walls.
Claim 4
Dependent Claim
36 words
The annular heat exchanger defined in claim 1, wherein the first seal means directs the fluid into said first passageways, and the second seal means directs the fluid out of the second passageways along the shaft.
Claim 5
Dependent Claim
27 words
The annular heat exchanger defined in claim 3, wherein the seal means are of the labyrinth type with the passageways being intermediate the extremities of the seals.
Claim 6
Dependent Claim
37 words
The annular heat exchanger defined in claim 1, wherein the entrances to the first passageways and the exits from the second passageways are located on the same diameter with reference to the center line of the shaft.
Claim 7
Dependent Claim
22 words
The annular heat exchanger defined in claim 1, wherein the fluid flows through the heat exchanger compartment with a straight-through flow pattern.
Claim 8
Dependent Claim
46 words
The annular heat exchanger defined in claim 1, wherein the holes in each disc-like distribution plate are located at different radial distances from the center of the shaft and the number of holes increases as the radial distance from the center line of the shaft increases.
Claim 9
Dependent Claim
54 words
The annular heat exchanger defined in claim 1, wherein the holes in each disc-like distribution plate are located in a plurality of circular rows spaced radially outwardly from the center of the shaft and the number of holes in successive rows increases as the radial distance from the center line of the shaft increases.
Claim 10
Dependent Claim
47 words
The annular heat exchanger defined in claim 1, wherein the holes in each disc-like distribution plate are located at different radial distances from the center of the shaft and the diameter of each hole increases as its radial distance from the center line of the shaft increases.
Claim 11
Dependent Claim
55 words
The annular heat exchanger defined in claim 1, wherein the holes in each disc-like distribution plate are located in a plurality of circular rows spaced radially outwardly from the center of the shaft and the diameter of the holes in successive rows increases as the radial distance from the center line of the shaft increases.
References Cited (Backward Citations)
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US3574473A
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US3620639A
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US3666375A
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US3652179A
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |