US3799707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor
Assignee: Borg Warner Corp
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Filing: 1972-06-12
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Granted: 1974-03-26
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Expires: 1992-06-12
Abstract
Abstract A capacity control system for a rotary gas compressor of the sliding vane type having a rotor placed eccentrically within a working chamber provided by the cylinder of a stator housing, the rotor carrying blades or vanes freely slidable in slots in the rotor to engage the cylinder. A control plate is positioned between the rotor and one of the housing cover plates and has an arcuate aperture providing a flow path for refrigerant gas. The control plate is rotatably adjustable to locate the aperture in relation to slots in the rotor periphery, between the blades, to vary the effective size of the compression chamber.
Inventors
- 👤 A Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:42
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/10; F04C28/14; F04C28/24; F04C28/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A rotary compressor comprising a housing having a closed working chamber provided with a substantially cylindrical surface, said housing having an inlet port and an outlet port communicating with said chamber; a rotor mounted in said chamber and rotatable about an axis eccentric to the axis of said cylindrical surface, said rotor having contact with said cylindrical surface at one point on its periphery, and a plurality of vanes slidably supported in said rotor and engaging said cylindrical surface, said rotor having slots in the periphery thereof between said vanes and each slot communicating with said chamber; and a control member mounted in said housing and provided with an aperture capable of spanning two adjacent rotor slots and operative to connect slots consecutively positioned in communication therewith by rotation of said rotor, said control member being positioned in said housing to vent the compression side of the chamber, through said aperture and the slots connectible thereto, to the suction side of the chamber to control the capacity of the compressor.
Claim 2
Dependent Claim
170 words
A rotary compressor comprising a housing having a closed working chamber provided with a substantially cylindrical surface, said housing having an inlet port and an outlet port communicating with said chamber; a rotor mounted in said chamber and rotatable about an axis eccentric to the axis of said cylindrical surface, said rotor having contact with said cylindrical surface at one point on its periphery, and a plurality of vanes slidably supported in said rotor and engaging said cylindrical surface, said rotor having slots in the periphery thereof between said vanes and each slot communicating with said chamber; and a control member mounted in said housing and provided with an aperture capable of spanning two adjacent rotor slots and operative to connect slots consecutively positioned in communication therewith by rotation of said rotor, said control member being positioned in said housing to vent the compression side of the chamber, through said aperture and the slots connectible thereto, to the suction side of the chamber to control the capacity of the compressor.
Claim 3
Dependent Claim
32 words
A rotary compressor as defined in claim 1 in which said control membEr is rotatable relative to said housing for adjustment to different positions effective to vary the capacity of the compressor.
Claim 4
Dependent Claim
38 words
A rotary compressor as defined in claim 1 in which said control member comprises an annular plate engaging one side of said rotor and which side is provided with said slots connectible to said aperture of said plate.
Claim 5
Dependent Claim
35 words
A rotary compressor as defined in claim 4 in which said plate is rotatable about the axis of rotation of said rotor for adjustment to different positions effective to vary the capacity of the compressor.
Claim 6
Dependent Claim
73 words
A rotary compressor as defined in claim 1 in which said housing comprises an annular member having said inlet port and cylindrical surface, and spaced walls closing the open ends of said annular member to provide said chamber with one of said walls having a recess, and said control member comprising an annular plate concentric to the axis of said rotor and mounted in said recess to engage the side of said rotor.
Claim 7
Dependent Claim
35 words
A rotary compressor as defined in claim 5 in which said control plate is rotatable relative to said rotor and said housing for adjustment to different positions effective to vary the capacity of the compressor.
References Cited (Backward Citations)
US3120814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |