Patent US4498853A successfully refreshed from Google Patents.
US4498853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vane-type compressor
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1980-12-08
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Granted: 1985-02-12
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Expires: 2000-12-08
Abstract
Abstract A vane-type compressor of the lubrication type in which pressure applied to vane bottoms is controlled to prevent vane breakage and excessive wear. A rotor is disposed between a rotor housing and a pair of side housings with vanes slidingly disposed within corresponding vane grooves radially formed in the rotor. Intake fluid pressure is applied to spaced defined between each of the grooves and the bottom of the corresponding vanes during suction strokes through a first arcuate groove. A second arcuate groove is formed in an inner surface of the side housings at a position corresponding to the spaces during compression strokes. A pressure discharge passage connected to the arcuate groove and an outlet port is provided and a check valve is provided in the pressure discharge passage.
Inventors
- 👤 Hiroshi Sakamaki
- 👤 Yukio Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:03
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/12; F04C29/124; F04C29/126; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863; F04C23/00; F04C23/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A vane-type compressor comprising: a rotor housing; a pair of side housings; a rotor rotatably disposed within a rotor chamber defined between said rotor housing and said pair of side housings; a plurality of vanes slidably disposed within corresponding vane grooves radially formed in said rotor; means for applying intake fluid pressure to spaces defined between each said vane groove and a bottom of the corresponding vane during suction strokes, said pressure being applied through a first arcuate groove, a second arcuate groove being formed in an inner surface of said side housing at a position corresponding to said spaces during compression strokes, a pressure discharge passage connecting said second arcuate groove and an outlet port; and a check valve provided in said pressure discharge passage, wherein said second arcuate groove is subdivided into a plurality of grooves, each of said plurality of grooves being connected to a corresponding one of said pressure discharge passages and check valves.
Claim 2
Dependent Claim
158 words
A vane-type compressor comprising: a rotor housing; a pair of side housings; a rotor rotatably disposed within a rotor chamber defined between said rotor housing and said pair of side housings; a plurality of vanes slidably disposed within corresponding vane grooves radially formed in said rotor; means for applying intake fluid pressure to spaces defined between each said vane groove and a bottom of the corresponding vane during suction strokes, said pressure being applied through a first arcuate groove, a second arcuate groove being formed in an inner surface of said side housing at a position corresponding to said spaces during compression strokes, a pressure discharge passage connecting said second arcuate groove and an outlet port; and a check valve provided in said pressure discharge passage, wherein said second arcuate groove is subdivided into a plurality of grooves, each of said plurality of grooves being connected to a corresponding one of said pressure discharge passages and check valves.
Claim 3
Dependent Claim
164 words
A vane-type compressor comprising: a rotor housing; a pair of side housings; a rotor rotatably disposed within a rotor chamber defined between said rotor housing and said pair of side housings; a plurality of vanes slidingly disposed within corresponding vane grooves radially formed in said rotor; means for applying intake fluid pressure to spaces defined between each said vane groove and a bottom of the corresponding vane during suction strokes, said pressure being applied through a first arcuate groove, a second arcuate groove being formed in an inner surface of said side housing at a position corresponding to said spaces during compression strokes, a pressure discharge passage connecting said second arcuate groove and an outlet port; and a check valve provided in said pressure discharge passage, and further comprising a third arcuate groove formed in the inner surface of said side housing at a position corresponding to said spaces during exhaust strokes, said third arcuate groove being in fluid communication with said outlet port.
Claim 4
Dependent Claim
164 words
A vane-type compressor comprising: a rotor housing; a pair of side housings; a rotor rotatably disposed within a rotor chamber defined between said rotor housing and said pair of side housings; a plurality of vanes slidingly disposed within corresponding vane grooves radially formed in said rotor; means for applying intake fluid pressure to spaces defined between each said vane groove and a bottom of the corresponding vane during suction strokes, said pressure being applied through a first arcuate groove, a second arcuate groove being formed in an inner surface of said side housing at a position corresponding to said spaces during compression strokes, a pressure discharge passage connecting said second arcuate groove and an outlet port; and a check valve provided in said pressure discharge passage, and further comprising a third arcuate groove formed in the inner surface of said side housing at a position corresponding to said spaces during exhaust strokes, said third arcuate groove being in fluid communication with said outlet port.
Claim 5
Dependent Claim
66 words
The compressor of claim 1 wherein an additional pressure discharge passage is provided having one end opened to said inner surface portion of said side housing, said inner surface portion being at a position corresponding to a working chamber during compression strokes, and further comprising a check valve provided in said additional pressure discharge passage for preventing backflow of said pressure discharged from said working chamber.
Claim 6
Dependent Claim
29 words
The compressor of claim 1 wherein the angle between ends of said plurality of arcuate grooves forming said second arcuate groove is in a range of 5° to 35°.
Claim 7
Dependent Claim
25 words
The compressor of claim 1 wherein the angle between ends of said first and second arcuate grooves is in a range of 5° to 35°.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |