US3741688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulation pump for refrigeration plant
Assignee: Kvaerner Brug AS
•
Filing: 1971-08-12
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Granted: 1973-06-26
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Expires: 1991-08-12
Abstract
Abstract A hydraulic or pneumatic motor for driving a pump in a refrigeration plant has the outlet conduit arranged in a loop in an oil chamber where the pump and motor is placed the loop giving off heat sufficient to evaporate cooling fluid which may leak into said chamber.
Inventors
- 👤 J Krosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:04
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/04; F04D13/046; F04D7/00; F04D7/02; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H2708/00; F16H2708/16; F16H2708/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
In a circulation system for refrigeration plants, the combination comprising: a closed housing having sealing partition means defining first and second chambers; pump means in said first chamber for pumping a cooling medium through said system; fluid-driven motor means mounted on said second chamber; rotatable shaft means extending through said chambers and operatively interconnecting said pump means and motor means; bearing means mounted in said sealing partition means so as to sealingly engage said shaft means and said partition means; a quantity of lubricating fluid in said second chamber adapted to lubricate said bearing means; fluid conduit means connected to the fluid outlet side of said motor means and extending into said second chamber so as to form loop means immersed in and conveying heated motor drive fluid through said lubricating fluid, said heated motor drive fluid in said loop means being adapted to elevate the temperature of said lubricating fluid so as to vaporize cooling medium contained in said lubricating fluid due to leakage of the latter past said sealing partition means from said first chamber into said second chamber.
Claim 2
Dependent Claim
181 words
In a circulation system for refrigeration plants, the combination comprising: a closed housing having sealing partition means defining first and second chambers; pump means in said first chamber for pumping a cooling medium through said system; fluid-driven motor means mounted on said second chamber; rotatable shaft means extending through said chambers and operatively interconnecting said pump means and motor means; bearing means mounted in said sealing partition means so as to sealingly engage said shaft means and said partition means; a quantity of lubricating fluid in said second chamber adapted to lubricate said bearing means; fluid conduit means connected to the fluid outlet side of said motor means and extending into said second chamber so as to form loop means immersed in and conveying heated motor drive fluid through said lubricating fluid, said heated motor drive fluid in said loop means being adapted to elevate the temperature of said lubricating fluid so as to vaporize cooling medium contained in said lubricating fluid due to leakage of the latter past said sealing partition means from said first chamber into said second chamber.
Claim 3
Dependent Claim
43 words
A system as claimed in claim 1, comprising outlet means in said second chamber located above the level of said lubricating fluid; and pressure-actuated valve means being positioned in said outlet means facilitating egress of said vaporized cooling medium from said second chamber.
Claim 4
Dependent Claim
32 words
A system as claimed in claim 2, said outlet means communicating with said first chamber so as to return said vaporized fluid medium to the fluid medium being pumped through said system.
Claim 5
Dependent Claim
14 words
A system as claimed in claim 1, said motor means comprising a hydraulic motor.
Claim 6
Dependent Claim
14 words
A system as claimed in claim 1, said motor means comprising a pneumatic motor.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |