US3695786A
Expired / Lapsed
US
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Compressor and method of lubrication
Assignee: Copeland Refrigeration Corp
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Filing: 1970-01-27
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Granted: 1972-10-03
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Expires: 1990-01-27
Abstract
Abstract A Scotch yoke refrigeration compressor of the four cylinder Xtype has a rear discharge chamber containing a high pressure oil sump from which oil is led through a capillary tube to a cavity in the body containing a low pressure oil sump from which the oil is led to the parts to be lubricated. The pressure of oil in the low pressure sump is materially reduced but somewhat higher than the pressure in the areas of the lubricated parts. A high point of the low pressure sump is vented to a compressor inlet passage area having a pressure slightly below that in the low pressure sump and slightly above that in the areas of the lubricated parts.
Inventors
- 👤 Edwin L Gannaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:55
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/04; F04B27/053; F04B39/00; F04B39/0027; F04B39/0044; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246; F04B39/10; F04B39/1066; F04B39/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A refrigeration compressor having an inlet area, a discharge chamber, a low pressure region containing parts to be lubricated, a high pressure oil sump pressurized by said discharge chamber, a second chamber defining a low pressure oil sump, pressure reducing oil-conducting means connecting said high pressure oil sump to said second chamber and tending to maintain said second chamber at a pressure somewhat above that in said low pressure region but substantially below that in high pressure sump, and conduit portions connecting a lower portion of said low pressure oil sump to said parts To be lubricated, the capacity of the low pressure oil sump being sufficient to accommodate the entire oil supply of the compressor.
Claim 2
Dependent Claim
116 words
A refrigeration compressor having an inlet area, a discharge chamber, a low pressure region containing parts to be lubricated, a high pressure oil sump pressurized by said discharge chamber, a second chamber defining a low pressure oil sump, pressure reducing oil-conducting means connecting said high pressure oil sump to said second chamber and tending to maintain said second chamber at a pressure somewhat above that in said low pressure region but substantially below that in high pressure sump, and conduit portions connecting a lower portion of said low pressure oil sump to said parts To be lubricated, the capacity of the low pressure oil sump being sufficient to accommodate the entire oil supply of the compressor.
Claim 3
Dependent Claim
39 words
A compressor as defined in claim 1 wherein said low pressure region is at a pressure somewhat below that in said inlet area when the compressor is running, and vent means connecting said second chamber to said inlet area.
Claim 4
Dependent Claim
31 words
A compressor as defined in claim 2 including a body having said second chamber in a lower portion thereof and said last mentioned low pressure area in an upper portion thereof
Claim 5
Dependent Claim
31 words
In a compressor as defined in claim 2, a body having said low pressure oil sump chamber located near the bottom and said low pressure area in an upper portion thereof.
Claim 6
Dependent Claim
123 words
A refrigeration compressor as defined in claim 2 including a body, a crankshaft journaled therein and drivable from one end, a plurality of radial cylinders perpendicular to the axis of the crankshaft, said discharge chamber and high pressure oil sump being combined in a single chamber located at a part of the body appurtenant to the other end of the crankshaft, the second chamber being located in a lower portion of the body, said means connecting the low pressure oil sump to the parts to be lubricated being connected to a bottom area of said second chamber and leading to an end of said crankshaft opposite the drivable end, and said vent means being connected to an upper area of said second chamber.
Claim 7
Independent Claim
107 words
The method of lubricating a refrigeration compressor having a low pressure suction area containing parts to be lubricated, a high pressure discharge area, and a charge of lubricant, which comprises collecting lubricant form the compressor discharge in a high pressure sump and pressurizing it by pressure from the discharge area, conducting lubricant from said high pressure sump to an intermediate pressure sump having a capacity sufficient to accommodate the entire charge, while reducing its pressure to a value lower than that in the discharge area but higher than that in said suction area, and conducting lubricant from said intermediate pressure sump to the parts to be lubricated.
Claim 8
Independent Claim
107 words
The method of lubricating a refrigeration compressor having a low pressure suction area containing parts to be lubricated, a high pressure discharge area, and a charge of lubricant, which comprises collecting lubricant form the compressor discharge in a high pressure sump and pressurizing it by pressure from the discharge area, conducting lubricant from said high pressure sump to an intermediate pressure sump having a capacity sufficient to accommodate the entire charge, while reducing its pressure to a value lower than that in the discharge area but higher than that in said suction area, and conducting lubricant from said intermediate pressure sump to the parts to be lubricated.
Claim 9
Dependent Claim
68 words
A method as defined in claim 6 for use with a compressor having an inlet area wherein the operating pressure is below that in the intermediate pressure sump but above that in said suction area, and wherein gas is liberated from the lubricant in the intermediate pressure sump, comprising the further step of conducting gas from an upper portion of the intermediate pressure sump to said inlet area.
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |