US3712764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable construction for mating surfaces of the rotor and port member of a liquid ring pump
Assignee: Nash Engineering Co
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Filing: 1971-04-19
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Granted: 1973-01-23
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Expires: 1991-04-19
Abstract
Abstract A liquid ring pump has a conical port member located within the corresponding central opening in the rotor and defines with the rotor a working clearance. Wear on the surfaces defining the working clearance reduces the efficiency of the pump. The present construction offers the ability to readjust the position of the port member so that the original clearance between the port member taper and the rotor can be re-established, and the pump performance increased to its full capacity. This adjustment may be made without the disassembly of the pump.
Inventors
- 👤 R Shearwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:29
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/005; F04C19/008
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
211 words
A liquid ring pump comprising a rotor having a plurality of angularly spaced vanes disposed in generally axial planes to define a plurality of working chambers opened at their radially inner and outer ends, the radially inner edges of said vanes defining a bore within which is received a stationary port member having circumferentially spaced apart inlet and outlet ports formed in its surface, the radially inner ends of the working chambers alternately passing the inlet and outlet ports of the port member as the rotor turns, said bore and port member having mating frustoconical surfaces defining a running clearance therebetween, the frustoconical surface of said port member being that in which said inlet and outlet ports are formed, the diameter of the smaller base of the frustoconical surface of the port member being lesser than the diameter of the smaller base of the frustoconical surface of the bore of the rotor and the diameter of the larger base of the frustoconical surface of the port member being no greater than the diameter of the larger base of the frustoconical surface of the bore of the rotor whereby after wear causes an increase in the running clearance, insertion of the port member more deeply into the bore reestablishes the original clearance.
Claim 2
Dependent Claim
211 words
A liquid ring pump comprising a rotor having a plurality of angularly spaced vanes disposed in generally axial planes to define a plurality of working chambers opened at their radially inner and outer ends, the radially inner edges of said vanes defining a bore within which is received a stationary port member having circumferentially spaced apart inlet and outlet ports formed in its surface, the radially inner ends of the working chambers alternately passing the inlet and outlet ports of the port member as the rotor turns, said bore and port member having mating frustoconical surfaces defining a running clearance therebetween, the frustoconical surface of said port member being that in which said inlet and outlet ports are formed, the diameter of the smaller base of the frustoconical surface of the port member being lesser than the diameter of the smaller base of the frustoconical surface of the bore of the rotor and the diameter of the larger base of the frustoconical surface of the port member being no greater than the diameter of the larger base of the frustoconical surface of the bore of the rotor whereby after wear causes an increase in the running clearance, insertion of the port member more deeply into the bore reestablishes the original clearance.
Claim 3
Dependent Claim
190 words
A liquid ring pump comprising a rotor having a plurality of angularly spaced vanes disposed in generally axial planes to define a plurality of working chambers opened at their radially inner and outer ends, the radially inner edges of said vanes defining a bore within which is received a stationary port member having circumferentially spaced apart inlet and outlet ports formed in its surface, the radially inner ends of the working chambers alternately passing the inlet and outlet ports of the port member as the rotor turns, the surface of the bore and the adjacent surface of the port member being frustoconical and of equal cone angle and defining therebetween a running clearance, the lesser base of said port member surface being located closer to the cone apex than the lesser base of the rotor surface and the greater base of the port member surface being located no further away from the cone apex than the greater base of said rotor surface whereby after wear causes an increases in the running clearances, displacement of the port member relatively to the rotor and towards the cone apex reestablishes the original clearance.
Claim 4
Dependent Claim
190 words
A liquid ring pump comprising a rotor having a plurality of angularly spaced vanes disposed in generally axial planes to define a plurality of working chambers opened at their radially inner and outer ends, the radially inner edges of said vanes defining a bore within which is received a stationary port member having circumferentially spaced apart inlet and outlet ports formed in its surface, the radially inner ends of the working chambers alternately passing the inlet and outlet ports of the port member as the rotor turns, the surface of the bore and the adjacent surface of the port member being frustoconical and of equal cone angle and defining therebetween a running clearance, the lesser base of said port member surface being located closer to the cone apex than the lesser base of the rotor surface and the greater base of the port member surface being located no further away from the cone apex than the greater base of said rotor surface whereby after wear causes an increases in the running clearances, displacement of the port member relatively to the rotor and towards the cone apex reestablishes the original clearance.
Claim 5
Dependent Claim
44 words
A liquid ring pump as claimed in claim 1 in which the diameter of the larger base of the frustoconical surface of the port member is less than the diameter of the larger base of the frustoconical surface of the bore of the rotor.
Claim 6
Dependent Claim
36 words
A liquid ring pump as claimed in claim 2 wherein the greater base of the port member is located closer to the cone apex than is the greater base of said frustoconical surface of said rotor.
Claim 7
Dependent Claim
51 words
A liquid ring pump as claimed in claim 1 wherein said larger diameter of said port member is lesser than the larger diameter of said rotor by about 0.010 inch and the smaller diameter of said port member is about 0.010 inch inches less than the smaller diameter of said rotor.
Claim 8
Dependent Claim
54 words
A liquid ring pump as claimed in claim 2 wherein said lesser base of the port member is smaller than the lesser base of said rotor by about 0.010 inch and said greater base of said port member is smaller than the diameter of said greater base of said rotor by about 0.010 inch.
Claim 9
Dependent Claim
38 words
A liquid ring pump as claimed in claim 1 wherein the smaller base of said cone is located about one thirty-second of an inch closer to the cone apex than is the smaller base of said rotor surface.
Claim 10
Dependent Claim
41 words
A liquid ring pump as claimed in claim 2 wherein the lesser base of said port member surface is about one thirty-second of an inch closer to the apex of the cone than is the lesser base of the rotor surface.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |