US3813193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor including means for reducing vane slot wear
Assignee: General Electric Co
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Filing: 1972-07-31
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Granted: 1974-05-28
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Expires: 1992-07-31
Abstract
Abstract A hermetically sealed rotary refrigerant compressor comprising a compression cylinder, a rotor eccentrically rotatable in the cylinder, and a vane slidably mounted in a slot in the cylindrical wall of the cylinder includes means for introducing high pressure refrigerant into the vane slot at wall areas of maximum slot wear and connecting wall areas opposite the areas of maximum wear to low pressure.
Inventors
- 👤 D Rinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:27
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/30; F01C1/32; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C18/356; F04C29/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
187 words
A rotary gas compressor comprising: means including a cylindrical wall defining an annular compression cylinder; a rotor eccentrically rotatable within said cylinder, spaced suction and discharge ports communicating with said cylinder; a radially extending slot in said cylindrical wall between said ports and including spaced side walls; a vane slidably mounted in said slot between said slot side walls and having one end engaging said rotor to divide said cylinder into low and high pressure chambers within said cylinder whereby the difference in gas pressure on the opposite faces of said vane exerts forces on said vane concentrating wear at first slot side wall areas adjacent the outer cylinder end of one slot side wall on the low pressure side of said vane and adjacent the inner end of the other slot side wall on the high pressure side of said vane means for reducing slot wear in said first areas comprising means connecting said first areas to a source of high pressure gas; and means connecting areas of said slot side walls on opposite sides of said vane from said first areas to low pressure gas.
Claim 2
Dependent Claim
187 words
A rotary gas compressor comprising: means including a cylindrical wall defining an annular compression cylinder; a rotor eccentrically rotatable within said cylinder, spaced suction and discharge ports communicating with said cylinder; a radially extending slot in said cylindrical wall between said ports and including spaced side walls; a vane slidably mounted in said slot between said slot side walls and having one end engaging said rotor to divide said cylinder into low and high pressure chambers within said cylinder whereby the difference in gas pressure on the opposite faces of said vane exerts forces on said vane concentrating wear at first slot side wall areas adjacent the outer cylinder end of one slot side wall on the low pressure side of said vane and adjacent the inner end of the other slot side wall on the high pressure side of said vane means for reducing slot wear in said first areas comprising means connecting said first areas to a source of high pressure gas; and means connecting areas of said slot side walls on opposite sides of said vane from said first areas to low pressure gas.
Claim 3
Dependent Claim
208 words
A hermetic, rotary refrigerant compressor comprising: a hermetic casing containing high pressure refrigerant gas; a compressor positioned in said casing and including end plates and a cylindrical wall member defining an annular compression cylinder; a rotor eccentrically rotatable within said cylinder; spaced suction and discharge ports communicating with said cylinder; a radially extending slot in said wall member between said ports and including spaced side walls; a vane slidably mounted in said slot between said side walls and biased into engagement with said rotor to divide said cylinder into low and high pressure chambers whereby the difference in gas pressure on said vane during operation of said compressor exerts a side force on said vane concentrating wear at first slot side wall areas adjacent the outer cylinder end of one slot side wall on the low pressure side of said vane and adjacent the inner end of the other slot side wall on the high pressure side of said vane; and means for reducing said slot side wall wear comprising means for conducting high pressure refrigerant to said first slot side wall areas, and means connecting an area of each slot side wall on the opposite side of said vane from said first areas to low refrigerant pressure.
Claim 4
Dependent Claim
208 words
A hermetic, rotary refrigerant compressor comprising: a hermetic casing containing high pressure refrigerant gas; a compressor positioned in said casing and including end plates and a cylindrical wall member defining an annular compression cylinder; a rotor eccentrically rotatable within said cylinder; spaced suction and discharge ports communicating with said cylinder; a radially extending slot in said wall member between said ports and including spaced side walls; a vane slidably mounted in said slot between said side walls and biased into engagement with said rotor to divide said cylinder into low and high pressure chambers whereby the difference in gas pressure on said vane during operation of said compressor exerts a side force on said vane concentrating wear at first slot side wall areas adjacent the outer cylinder end of one slot side wall on the low pressure side of said vane and adjacent the inner end of the other slot side wall on the high pressure side of said vane; and means for reducing said slot side wall wear comprising means for conducting high pressure refrigerant to said first slot side wall areas, and means connecting an area of each slot side wall on the opposite side of said vane from said first areas to low refrigerant pressure.
Claim 5
Dependent Claim
79 words
The compressor of claim 2 which includes: laterally extending grooves adjacent the outer and inner ends of both of said slot side walls; the grooves of the outer end of said one slot side wall and at the inner end of said other side wall receiving the high pressure refrigerant; and the grooves at the inner end of said one slot side wall and the outer end of said other side wall being connected to the low refrigerant pressure.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |