US4255100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary compressor with valve in rotor
Assignee: Robert Bosch GmbH
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Filing: 1978-08-08
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Granted: 1981-03-10
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Expires: 1998-08-08
Abstract
Abstract A rotary compressor includes housing means in which an impeller is rotatably mounted. The impeller carries a pair of abutting vanes engaging with outer ends the inner surface of the housing means extending along an endless cam curve to form, between this inner surface and the outer surface of the impeller and portions of the vanes projecting beyond the impeller, working spaces increasing and decreasing during rotation of the impeller so as to compress a gaseous medium passing through radially inward extending inlet passages into the working spaces, to pass from there through valves in the vanes into a central pressure space from where the compressed medium is discharged through an outlet passage communicating with the pressure space; and a method for operating the compressor in which oil for lubrication and sealing is fed together with the gaseous medium into the low pressure side of the compressor to be separated from the gaseous medium by centrifugal action and passed back over gaps between the elements of the compressor to the low-pressure side, whereby a separate oil circuit is created and the pressure medium is passed free of oil to a consumer.
Inventors
- 👤 Ernst Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:06
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/12; F04C29/124; F04C29/126; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/3446
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
180 words
A rotary compressor comprising stationary means forming an inner space defined by an inner peripheral surface extending along an endless cam curve of oval configuration; inlet passage means for a fluid medium communicating with said inner space and having inner open ends at said peripheral surface; annular impeller means rotatably mounted in said stationary means and defining a central pressure space, said impeller means being provided with diametrically opposite slots; means carried by said impeller means for rotation therewith and having outer free ends engaging said cam curve for sucking the gaseous medium into said space and for compressing the medium, said means carried by said impeller means being constituted by a pair of vanes slidably arranged in said slots and abutting with side faces thereof against each other, said vanes extending through said central pressure space and having throughout their length the same thickness and height; only two valve means carried by one of said rotatable means for passing the compressed medium in radial inner direction into said pressure space; and outlet passage means communicating with said pressure space.
Claim 2
Dependent Claim
180 words
A rotary compressor comprising stationary means forming an inner space defined by an inner peripheral surface extending along an endless cam curve of oval configuration; inlet passage means for a fluid medium communicating with said inner space and having inner open ends at said peripheral surface; annular impeller means rotatably mounted in said stationary means and defining a central pressure space, said impeller means being provided with diametrically opposite slots; means carried by said impeller means for rotation therewith and having outer free ends engaging said cam curve for sucking the gaseous medium into said space and for compressing the medium, said means carried by said impeller means being constituted by a pair of vanes slidably arranged in said slots and abutting with side faces thereof against each other, said vanes extending through said central pressure space and having throughout their length the same thickness and height; only two valve means carried by one of said rotatable means for passing the compressed medium in radial inner direction into said pressure space; and outlet passage means communicating with said pressure space.
Claim 3
Dependent Claim
31 words
A rotary compressor as defined in claim 1, wherein the outer end faces of said vanes are chamfered so as to engage said inner peripheral surface substantially with a line contact.
Claim 4
Dependent Claim
27 words
A rotary compressor as defined in claim 1, wherein said thickness of each of said vanes is substantially equal to half of the width of the slot.
Claim 5
Dependent Claim
80 words
A rotary compressor as defined in claim 1, wherein said annular impeller means has an outer diameter substantially equal to the smallest diameter of said oval shaped inner peripheral surface so as to engage said inner peripheral surface along two diametrically opposite lines and wherein said inlet passage means comprises two inlet passages having diametrically opposite open ends at said inner surface adjacent and downstream, as considered in the direction of rotation of said impeller means, of said contact lines.
Claim 6
Dependent Claim
17 words
A rotary compressor as defined in claim 1, wherein said valve means are carried by said vanes.
Claim 7
Dependent Claim
32 words
A rotary compressor as defined in claim 5, wherein said impeller means is arranged within said cam curve in such a manner to define with said vanes diametrically opposite suction-respective compression spaces.
Claim 8
Dependent Claim
25 words
A rotary compressor as defined in claim 6, wherein the length of each vane corresponds substantially to the smallest diameter of said oval cam curve.
Claim 9
Dependent Claim
94 words
A rotary compressor as defined in claim 1, wherein each of said vanes is formed with at least one opening therethrough extending over part of the length of the respective vane and having an outer end, each of said vane being formed in a portion radially outward of said outer end of said opening with at least one radial bore and a small cavity at the inner end of the radial bore communicating with the respective opening, said valve means being located in said small cavity and controlling passage of fluid through said bore.
Claim 10
Dependent Claim
21 words
A rotary compressor as defined in claim 8, wherein said opening in each vane extends at least to the middle thereof.
Claim 11
Dependent Claim
21 words
A rotary compressor as defined in claim 8, wherein said valve means is a flutter valve having a plate-shaped valve body.
Claim 12
Dependent Claim
50 words
A rotary compressor as defined in claim 1, and including a pair of plates closing said inner space at opposite ends, said impeller means being provided with a coaxial extension formed with a bore therethrough and one of said plates forming a bearing in which said extension is turnably mounted.
Claim 13
Dependent Claim
92 words
A rotary compressor as defined in claim 11, and including a housing having a cylindrical wall and being closed at one end, said stationary means being constituted by a ring having an outer surface in engagement with the inner surface of said peripheral wall, said one plate being spaced from said closed end of said housing and including electric motor means for driving said impeller, said motor means including a rotor fixed to a portion of said extension projecting beyond said bearing and a stator winding at the outside of said housing.
Claim 14
Dependent Claim
28 words
A rotary compressor as defined in claim 12, wherein said outlet passage means communicates with the space between said closed end of said housing and said one plate.
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |