US3852003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sealed compressor
Assignee: Robert Bosch GmbH
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Filing: 1973-05-10
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Granted: 1974-12-03
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Expires: 1993-05-10
Abstract
Abstract A vane compressor has a rotor with radial vanes mounted in a housing cavity bounded by an endless actuator surface engaged by the outer ends of the vanes, and laterally bounded by two end walls having confronting stationary faces slidingly engaged by the rotor end faces to form clearance gaps. The end walls have conduits communicating with a high pressure container housing connected with the outlet of the housing, and opening in ports on the stationary housing faces, respectively, so as to fill and seal the gaps with high pressure fluid. The ports are longer in circumferential than in radial direction, and are located in an imaginary axial plane in which the vanes, which are completely inward pushed by the actuator surface, are located. Pressure ducts in the end walls are connected through an annular recess in the rotor shaft with an annular space in the rotor which is connected with the radially inner ends of the vane slots.
Inventors
- 👤 G Adalbert
- 👤 J Hess
- 👤 E Linder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/0007; Y; Y10; Y10S; Y10S418/00; Y10S418/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
305 words
Pressure-sealed compressor comprising housing means including a central housing part having a cylindrical cavity surrounded by an endless inner actuator surface, a pair of end walls closing the ends of said cavity and having confronting stationary faces, a tubular pintle on one of said end walls, and inlet and outlet means for a fluid, said housing means further including a container for high pressure fluid communicating with said outlet means and having an outlet for high pressure fluid; rotor means mounted on said housing means for rotation about an axis, and including a rotor having rotor end faces slidingly engaging said stationary faces and forming clearing gaps therewith, a drive shaft portion mounted in said tubular pintle for rotation and including a thin shaft portion formed with an annular recess, and a plurality of vanes respectively mounted in radial slots of said rotor and having outer ends slidingly engaging said actuator surface for forming expanding and contracting chambers between said rotor and said actuator surface, said inlet and outlet means communicating with said chambers, said rotor being formed with an annular space surrounding said pintle and connecting radially inner ends of said slots; said housing means being formed with duct means connecting said outlet means and said annular space so that high pressure in said slots urges said vanes into engagement with said actuator surface, said annular recess forming part of said duct means and communicating with said annular space; and at least one of said end walls being formed with a conduit having one end connected with said outlet means and the other end formed as a port in said stationary face of said end wall opening into the respective gap between the respective stationary face and rotor end face so that fluid is pressed into said gap for sealing the same against leakage.
Claim 2
Dependent Claim
305 words
Pressure-sealed compressor comprising housing means including a central housing part having a cylindrical cavity surrounded by an endless inner actuator surface, a pair of end walls closing the ends of said cavity and having confronting stationary faces, a tubular pintle on one of said end walls, and inlet and outlet means for a fluid, said housing means further including a container for high pressure fluid communicating with said outlet means and having an outlet for high pressure fluid; rotor means mounted on said housing means for rotation about an axis, and including a rotor having rotor end faces slidingly engaging said stationary faces and forming clearing gaps therewith, a drive shaft portion mounted in said tubular pintle for rotation and including a thin shaft portion formed with an annular recess, and a plurality of vanes respectively mounted in radial slots of said rotor and having outer ends slidingly engaging said actuator surface for forming expanding and contracting chambers between said rotor and said actuator surface, said inlet and outlet means communicating with said chambers, said rotor being formed with an annular space surrounding said pintle and connecting radially inner ends of said slots; said housing means being formed with duct means connecting said outlet means and said annular space so that high pressure in said slots urges said vanes into engagement with said actuator surface, said annular recess forming part of said duct means and communicating with said annular space; and at least one of said end walls being formed with a conduit having one end connected with said outlet means and the other end formed as a port in said stationary face of said end wall opening into the respective gap between the respective stationary face and rotor end face so that fluid is pressed into said gap for sealing the same against leakage.
Claim 3
Dependent Claim
70 words
Compressor as claimed in claim 1, wherein the other end wall is formed with a conduit having one end communicating with said container and the other end forming a port in the respective stationary face of said other end wall opening into the respective other gap between the other stationary face and the other rotor end face so that the same axial pressure acts at opposite ends of said rotor.
Claim 4
Dependent Claim
208 words
Pressure-sealed compressor comprising housing means including a central housing part forming a cylindrical cavity surrounded by an endless inner actuator surface, a pair of end walls closing the ends of said cavity and having confronting stationary faces, and inlet means and outlet means for a fluid; rotor means mounted in said housing means for rotation about an axis, and including a rotor having rotor end faces slidingly engaging said stationary faces and forming clearance gaps therewith, and at least one vane mounted in a radial slot of said rotor and having an outer end slidingly engaging said actuator surface for forming expanding and contracting chambers between said rotor and said actuator surface, said inlet means and outlet means on said housing means communicating with said expanding and contracting chambers, respectively; and each of said end walls being formed with a conduit having one end connected with said outlet means and the other end formed as a port in the respective stationary face of the respective end wall opening into the respective gap between the respective stationary face and rotor end face so that fluid is pressed into both gaps for sealing the same against leakage, each of said ports being longer in circumferential direction than in radial direction.
Claim 5
Dependent Claim
208 words
Pressure-sealed compressor comprising housing means including a central housing part forming a cylindrical cavity surrounded by an endless inner actuator surface, a pair of end walls closing the ends of said cavity and having confronting stationary faces, and inlet means and outlet means for a fluid; rotor means mounted in said housing means for rotation about an axis, and including a rotor having rotor end faces slidingly engaging said stationary faces and forming clearance gaps therewith, and at least one vane mounted in a radial slot of said rotor and having an outer end slidingly engaging said actuator surface for forming expanding and contracting chambers between said rotor and said actuator surface, said inlet means and outlet means on said housing means communicating with said expanding and contracting chambers, respectively; and each of said end walls being formed with a conduit having one end connected with said outlet means and the other end formed as a port in the respective stationary face of the respective end wall opening into the respective gap between the respective stationary face and rotor end face so that fluid is pressed into both gaps for sealing the same against leakage, each of said ports being longer in circumferential direction than in radial direction.
Claim 6
Dependent Claim
105 words
Compressor as claimed in claim 3, wherein said rotor means include four vanes forming in said cavity between said rotor and said actuator surface two expanding suction chambers and two contracting pressure chambers alternating with said suction chambers; wherein said actuator surface places diametrically disposed vanes simultaneously in innermost positions When passing through an imaginary axial plane whereby on one side of said imaginary plane high pressure, and on the other side of said plane low pressure prevails in said cavity; and wherein said ports are located in said imaginary axial plane and have port portions located on opposite sides of said imaginary axial plane.
Claim 7
Dependent Claim
31 words
Compressor as claimed in claim 4, wherein the radial outer boundary of said port is spaced from the outer surface of said rotor a radial distance between 2 and 5 millimeters.
Claim 8
Dependent Claim
41 words
compressor as claimed in claim 4, wherein the port portion located on said one high pressure side of said imaginary plane is longer in circumferential direction than the port portion located on the other low pressure side of said imaginary plane.
Claim 9
Dependent Claim
37 words
Compressor as claimed in claim 6, wherein two-thirds of the area of said port are located on said high pressure side and one-third of the area is located on said low pressure side of said imaginary plane.
Claim 10
Dependent Claim
58 words
Compressor as claimed in claim 3, wherein said rotor is formed with an annular space connecting the radially inner ends of said radial slots; and wherein said housing means are formed with duct means connecting said outlet means with said annular space so that high pressure in said slots urges said vanes into engagement with said actuator surface.
Claim 11
Dependent Claim
18 words
Compressor as claimed in claim 8, wherein said duct means include a throttle upstream of said annular space.
Claim 12
Dependent Claim
50 words
Compressor as claimed in claim 8, wherein said housing means include a container for high pressure fluid communicating with said outlet means and having an outlet for high pressure fluid; wherein said conduit has said one end communicating with said container; and wherein said duct means communicates with said container.
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |