US4251190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water ring rotary air compressor
Assignee: SPX Technologies Inc
•
Filing: 1979-02-08
•
Granted: 1981-02-17
•
Expires: 1999-02-08
Abstract
Abstract An improved water ring rotary air compressor in which the rotor assembly has a cylindrical bore while the port head includes a cylindrical port sleeve, made from a high lubricity thermoplastic material, which fits within the bore. The use of a high lubricity thermoplastic port sleeve eliminates the need for shimming the port head following an overhaul of the compressor. The port sleeve includes a plurality of longitudinal slots which eliminate cavitation during start up under pressure. A needle valve built into the manifold allows bypass of a portion of the discharge air into the air inlet. Adjustment of the needle valve permits the maintenance of constant air flow as the compressor becomes worn.
Inventors
- 👤 Charles D. Brown
- 👤 Cole N. Plummer
- 👤 Roger N. Tripp
- 👤 Maurice E. Fernald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:50
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/005; F04C19/008; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
A rotary liquid ring air compressor comprising: a compressor housing; a rotor assembly non-rotatably mounted on a shaft within said housing, said rotor assembly having a bore; means for introducing liquid in said housing for creating a liquid ring during rotation of said rotor assembly; means for rotating said shaft; a port head mounted on said housing; and a port sleeve mounted on said port head and positionable in said bore, said port sleeve including means for reducing cavitation during start-up of said compressor under pressure.
Claim 2
Dependent Claim
86 words
A rotary liquid ring air compressor comprising: a compressor housing; a rotor assembly non-rotatably mounted on a shaft within said housing, said rotor assembly having a bore; means for introducing liquid in said housing for creating a liquid ring during rotation of said rotor assembly; means for rotating said shaft; a port head mounted on said housing; and a port sleeve mounted on said port head and positionable in said bore, said port sleeve including means for reducing cavitation during start-up of said compressor under pressure.
Claim 3
Dependent Claim
24 words
The compressor of claim 1 wherein said means for reducing cavitation comprises at least two longitudinal slots on a surface of said port sleeve.
References Cited (Backward Citations)
US2871562A
Cited
US2966860A
Cited
US3145629A
Cited
US3366314A
Cited
US3404634A
Cited
US3713749A
Cited
US3712764A
Cited
US3806283A
Cited
US3894812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |