US3905729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston
Assignee: Bauer Kompressoren GmbH
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Filing: 1974-02-20
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Granted: 1975-09-16
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Expires: 1994-02-20
Abstract
Abstract In a rotating piston compressor plant for processing gas in conjunction with oil including an oil separator and an oil feedback line from the separator to the compressor, apparatus for simultaneously relieving the gas pressure on the oil separator and for blocking the feedback of oil to the compressor when the compressor is shut off, including a relief line for exhausting gas from the oil separator and a combination valve in the oil feedback line and the relief line actuated to an open position by the excess gas pressure on the pressure side of the compressor when operating and to a closed position by the excess gas pressure in the relief line when the compressor is shut off.
Inventors
- 👤 Heinz Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/0007; F04C29/0014; F04C29/02; F04C29/021; Y; Y10; Y10S; Y10S418/00; Y10S418/01; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86558
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
In a rotating piston compressor plant utilizing an oil separator in a gas conduit between the pressure side of a compressor and a consumer output and an oil feedback line between the oil separator and the compressor, and having a first check valve in the gas conduit line between the compressor and the oil separator and a second check valve between the oil separator and the consumer output, said check valves being closed when the compressor is shut off, an apparatus for simultaneously relieving the gas pressure on the oil separator and for blocking the feedback of oil to the compressor when the compressor is shut off comprising: a relief line for exhausting gas from said oil separator, a combination valve in said feedback line and in said relief line having an open position for permitting feedback of oil to said compressor and for blocking said relief line and a closed position for blocking said feedback line and opening said relief line, and means for automatically actuating said valve to the open position by expanding gas from the pressure side of said compressor when said compressor is on and for actuating said valve to the closed position at least by expanding gas from said oil separator when said compressor is shut off.
Claim 2
Dependent Claim
212 words
In a rotating piston compressor plant utilizing an oil separator in a gas conduit between the pressure side of a compressor and a consumer output and an oil feedback line between the oil separator and the compressor, and having a first check valve in the gas conduit line between the compressor and the oil separator and a second check valve between the oil separator and the consumer output, said check valves being closed when the compressor is shut off, an apparatus for simultaneously relieving the gas pressure on the oil separator and for blocking the feedback of oil to the compressor when the compressor is shut off comprising: a relief line for exhausting gas from said oil separator, a combination valve in said feedback line and in said relief line having an open position for permitting feedback of oil to said compressor and for blocking said relief line and a closed position for blocking said feedback line and opening said relief line, and means for automatically actuating said valve to the open position by expanding gas from the pressure side of said compressor when said compressor is on and for actuating said valve to the closed position at least by expanding gas from said oil separator when said compressor is shut off.
Claim 3
Dependent Claim
70 words
The apparatus of claim 1 wherein said combination valve comprises: a cylindrical housing element, a piston member coaxially guided in said cylindrical housing element, said piston member including two end positioned drive pistons and two blocking pistons spaced between said drive pistons and coaxial therewith, forming a compressor gas pressure cylinder and an oil separator gas pressure cylinder, said piston member being reciprocable as a unit in said housing element.
Claim 4
Dependent Claim
61 words
The apparatus of claim 2 wherein said combination valve also includes: individual passage ways for flow of said feedback oil and for flow of said gas exhausted from said oil separator, said passage ways being alternately blocked and opened by said blocking pistons by the reciprocation of said piston member, and means sealing off said individual passage ways from each other.
Claim 5
Dependent Claim
26 words
The apparatus of claim 3 wherein the volume of said compressor gas pressure cylinder is larger than the volume of said oil separator gas pressure cylinder.
Claim 6
Dependent Claim
141 words
The apparatus according to claim 1 wherein said combination valve comprises: a cylindrical housing element, a piston member coaxially guided in said cylindrical housing element, said piston member including two drive pistons and a oil feedback blocking piston spaced between said drive pistons and coaxial therewith, forming a compressor gas pressure cylinder and an oil separator gas pressure cylinder, said piston member being reciprocable as a unit in said housing element, and wherein said piston member also includes an integral drive and blocking pin in said oil separator gas cylinder, and wherein said means for automatically actuating said valve to the closed position at least by expanding gas from said oil separator includes a connection between said relief line and said oil separator gas pressure cylinder and wherein said pin blocks said connection when said valve is in said open position.
Claim 7
Dependent Claim
31 words
The apparatus according to claim 5 wherein said drive and blocking pin is conical in shape and wherein the surface of said connection blocked by said pin is of complementary contour.
Claim 8
Dependent Claim
77 words
The apparatus according to claim 6 wherein said combination valve also includes an individual passage way for flow of said feedback oil said passage way being alternately blocked and opened by said blocking piston by the reciprocation of said piston member and wherein said oil separation gas pressure cylinder includes an opening for exhaust of said expanding gas from said oil separator, and wherein said passage way is sealed off from said oil separation gas pressure cylinder.
Claim 9
Dependent Claim
44 words
The apparatus of claim 7 wherein said means for automatically actuating said valve to the closed position at least by expanding gas from said oil separator when said compressor is shut off also includes a compression spring in said oil separation gas pressure cylinder.
Claim 10
Dependent Claim
26 words
The apparatus of claim 7 wherein the volume of said compressor gas pressure cylinder is larger than the volume of said oil separation gas pressure cylinder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |