US3752605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary gas compressor
Assignee: Borg Warner Corp
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Filing: 1971-11-17
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Granted: 1973-08-14
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Expires: 1991-11-17
Abstract
Abstract A rotary gas compressor including a single vaned rotor positioned within a stator housing shaped to provide high and low pressure chambers, the housing and rotor being relatively movable to vary the sizes of the chambers. In one example, this construction can provide two-stage operation allowing the compressor to attain a high over-all pressure ratio. In a second example, the gas compressor is effective to provide high and low pressures to separate evaporators of a refrigeration system.
Inventors
- 👤 A Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/18; F04C28/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A compressor comprising a generally cylindrical rotor, said rotor being provided with a plurality of generally radially extending, slidable vanes; a rotor housing surrounding said rotor having a generally elliptically shaped chamber, the inner surface of which is engaged by said vanes, said rotor being located within said chamber so as to be closely adjacent said inner surface at two oppositely disposed points to provide first and second crescent-shaped compression cavities on opposite sides of said rotor; means defining a pair of suction ports respectively communicating with said compression cavities; means defining a pair of discharge ports respectively communicating with said compression cavities; means for interconnecting the discharge port of one compression cavity to the suction port of the other compression cavity; and pressure ratio control means for simultaneously reducing the volume of said first compression cavity and increasing the volume of said second compression cavity.
Claim 2
Dependent Claim
146 words
A compressor comprising a generally cylindrical rotor, said rotor being provided with a plurality of generally radially extending, slidable vanes; a rotor housing surrounding said rotor having a generally elliptically shaped chamber, the inner surface of which is engaged by said vanes, said rotor being located within said chamber so as to be closely adjacent said inner surface at two oppositely disposed points to provide first and second crescent-shaped compression cavities on opposite sides of said rotor; means defining a pair of suction ports respectively communicating with said compression cavities; means defining a pair of discharge ports respectively communicating with said compression cavities; means for interconnecting the discharge port of one compression cavity to the suction port of the other compression cavity; and pressure ratio control means for simultaneously reducing the volume of said first compression cavity and increasing the volume of said second compression cavity.
Claim 3
Dependent Claim
24 words
A compressor as defined in claim 1 in which said pressure ratio control means comprises means for moving said housing relative to said rotor.
Claim 4
Dependent Claim
39 words
A compressor as defined in claim 2 in which said rotor housing inner surface has spaced parallel flat faces, and said rotor has engagement, at diametrically spaced portions thereof, with said faces to provide cut-off points defining said chambers.
Claim 5
Dependent Claim
45 words
A compressor as defined in claim 3 in which said elliptically shaped chamber has spaced reversely curved arcuate faces connected by said flat faces of said housing surface, each arcuate face having a radius of curvature approximately equal to the cylindrical surface of said rotor.
References Cited (Backward Citations)
DE374348C
Cited
US2170786A
Cited
US2481605A
Cited
US2938469A
Cited
US3187676A
Cited
US3381891A
Cited
US3560118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |