Patent US3744935A successfully refreshed from Google Patents.
US3744935A
Expired / Lapsed
US
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Cooling systems for motor driven pumps and the like
Assignee: Crane Co
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Filing: 1971-10-07
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Granted: 1973-07-10
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Expires: 1991-10-07
Abstract
Abstract Cooling systems for motor driven pumps and the like are disclosed which include the use of a sub cooler applied to motor driven pumps and the like that impel low boiling fluids and include provisions for bleeding a small portion of the pumped fluid, flashing the fluid for cooling, using the vapor to cool the pumped fluid and/or circulating the vapor around the pump to cool the bearing and other critical areas susceptible to excessive heating.
Inventors
- 👤 R Magni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:39
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/58; F04D29/586; F04D29/5886; F04D13/00; F04D13/02; F04D13/06; Y; Y10; Y10S; Y10S417/00; Y10S417/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
Cooling apparatus for motor driven pumps and the like for low boiling point liquids which comprises a source of low boiling point liquid to be pumped, a motor driven pump having inlet and delivery connections and having the inlet connection connected to said source for the introduction of said liquid to the inlet connection and pump, means for diverting a portion of the liquid from said source and vaporizing said diverted portion in predetermined cooling relation to said pump, fluid delivery means returning the vaporized liquid in liquid form to said source, and said diverting and vaporizing means includes heat exchange means interposed between the source and the pump inlet connection for cooling the liquid delivered to the pump inlet connection.
Claim 2
Dependent Claim
121 words
Cooling apparatus for motor driven pumps and the like for low boiling point liquids which comprises a source of low boiling point liquid to be pumped, a motor driven pump having inlet and delivery connections and having the inlet connection connected to said source for the introduction of said liquid to the inlet connection and pump, means for diverting a portion of the liquid from said source and vaporizing said diverted portion in predetermined cooling relation to said pump, fluid delivery means returning the vaporized liquid in liquid form to said source, and said diverting and vaporizing means includes heat exchange means interposed between the source and the pump inlet connection for cooling the liquid delivered to the pump inlet connection.
Claim 3
Dependent Claim
16 words
Cooling apparatus as defined in claim 1 in which said fluid delivery means includes a compressor.
Claim 4
Dependent Claim
24 words
Cooling apparatus as defined in claim 2 in which said compressor is connected in driven relation to the motor of said motor driven pump.
Claim 5
Dependent Claim
18 words
Cooling apparatus as defined in claim 2 in which said fluid delivery means also includes sEparate cooling means.
Claim 6
Dependent Claim
30 words
Cooling apparatus as defined in claim 1 in which said diverting and vaporizing means includes an expansion orifice, and a heat exchanger into which fluid is expanded through said orifice.
Claim 7
Dependent Claim
117 words
Cooling apparatus for motor driven pumps and the like for low boiling point fluids which comprises a source of low boiling point fluid to be pumped, a motor driven pump having inlet and delivery connections and having the inlet connection connected to said source, means for diverting a portion of the fluid from said source and vaporizing said diverted portion in predetermined cooling relation to said pump, fluid delivery means returning the vaporized fluid in liquid form to said source, and a fluid connection is provided from the delivery connection of the pump to the inlet connection of the pump, and said diverting and vaporizing means includes heat exchange means cooling the fluid in said fluid connection.
Claim 8
Dependent Claim
117 words
Cooling apparatus for motor driven pumps and the like for low boiling point fluids which comprises a source of low boiling point fluid to be pumped, a motor driven pump having inlet and delivery connections and having the inlet connection connected to said source, means for diverting a portion of the fluid from said source and vaporizing said diverted portion in predetermined cooling relation to said pump, fluid delivery means returning the vaporized fluid in liquid form to said source, and a fluid connection is provided from the delivery connection of the pump to the inlet connection of the pump, and said diverting and vaporizing means includes heat exchange means cooling the fluid in said fluid connection.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |