Patent USRE29747E successfully refreshed from Google Patents.
USRE29747E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid ring pump lobe purge
Assignee: Nash Engineering Co
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Filing: 1977-03-21
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Granted: 1978-08-29
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Expires: 1997-03-21
Abstract
Abstract Purging passages are machined or cast into the casing of a liquid ring compressor through which soluble or nonsoluble contaminants which may be present in the liquid ring may be removed from the compressor. These passages in single lobe pumps are located in the outer peripheral zones of the casing approximately 240° from the pump land in the direction of rotation of the rotor in the area of the drive and idle ends of the rotor.
Inventors
- 👤 Kenneth W. Roe
- 👤 Ernest E. Studwell
- 👤 Robert E. Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:06
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A method of reducing wear in liquid ring pumps which would result from abrasive action of contaminants carried in the liquid of the ring which method comprises, .Iadd.determining the region where excessive wear would occur as a result of contaminants carried by the liquid ring.Iaddend., forming conduit means opening to the interior of the ring chamber at .[.a.]. .Iadd.said .Iaddend.region .[.where, but for that opening, excessive wear would occur.]. and during operation of the pump.Iadd., .Iaddend.purging a portion of the ring liquid and a substantial part of the contaminants of the ring through said conduit means.
Claim 2
Independent Claim
96 words
A method of reducing wear in liquid ring pumps which would result from abrasive action of contaminants carried in the liquid of the ring which method comprises, .Iadd.determining the region where excessive wear would occur as a result of contaminants carried by the liquid ring.Iaddend., forming conduit means opening to the interior of the ring chamber at .[.a.]. .Iadd.said .Iaddend.region .[.where, but for that opening, excessive wear would occur.]. and during operation of the pump.Iadd., .Iaddend.purging a portion of the ring liquid and a substantial part of the contaminants of the ring through said conduit means.
Claim 3
Independent Claim
62 words
A method of constructing a liquid ring pump which consists in determining where excessive wear results from contaminants carried by the liquid ring and forming conduit means opening to the ring at that location whereby in operation a portion of the ring liquid and a major part of the contaminants is purged from the interior of the pump through said conduit means.
Claim 4
Independent Claim
62 words
A method of constructing a liquid ring pump which consists in determining where excessive wear results from contaminants carried by the liquid ring and forming conduit means opening to the ring at that location whereby in operation a portion of the ring liquid and a major part of the contaminants is purged from the interior of the pump through said conduit means.
Claim 5
Independent Claim
145 words
A method of constructing a liquid ring pump of the type having a casing, a rotor disposed within the casing and having end shrouds between which extend a plurality of generally radial vanes which, with the shrouds, define displacement chambers, radially inner and outer ends of which are open, inner edges of the vanes defining a central eye, a fixed conical port member extending into the eye and having inlet and outlet ports with which the inner ends of the displacement chambers alternatively are brought into register as the rotor turns which method comprises determining where in such a pump excessive wear results from contaminants carried by the liquid ring and forming conduit means opening to the ring at that location whereby in operation a portion of the ring liquid and a major part of the contaminants is purged from the interior of the pump.
Claim 6
Independent Claim
145 words
A method of constructing a liquid ring pump of the type having a casing, a rotor disposed within the casing and having end shrouds between which extend a plurality of generally radial vanes which, with the shrouds, define displacement chambers, radially inner and outer ends of which are open, inner edges of the vanes defining a central eye, a fixed conical port member extending into the eye and having inlet and outlet ports with which the inner ends of the displacement chambers alternatively are brought into register as the rotor turns which method comprises determining where in such a pump excessive wear results from contaminants carried by the liquid ring and forming conduit means opening to the ring at that location whereby in operation a portion of the ring liquid and a major part of the contaminants is purged from the interior of the pump.
Claim 7
Dependent Claim
31 words
A method of constructing a liquid ring pump as claimed in claim 3 which comprises disposing said conduit means to communicate with the ring adjacent an end shroud of the rotor.
Claim 8
Dependent Claim
53 words
A method of constructing a liquid ring pump as claimed in claim 3 in which the liquid ring pump includes a head adjacent one of said shrouds said head defining with said one shroud an end shroud chamber, the method consisting of disposing said conduit means to communicate with said end shroud chamber.
Claim 9
Dependent Claim
37 words
The method of constructing a liquid ring pump as claimed in claim 3 which comprises disposing said conduit means to communiate with the ring at approximately 240° from land in the direction of rotation of the rotor.
Claim 10
Dependent Claim
20 words
The method according to claim 4 wherein said opening is formed by machining through an existing wall of said pump.
Claim 11
Dependent Claim
39 words
The method of constructing a liquid ring pump as claimed in claim 5 which comprises disposing said conduit means to communicate with the end shroud chamber at approximately 240° from land in the direction of rotation of the rotor.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |