US4050851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid ring pumps and compressors using a ferrofluidic ring liquid
Assignee: Nash Engineering Co
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Filing: 1975-11-10
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Granted: 1977-09-27
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Expires: 1995-11-10
Abstract
Abstract Liquid ring compressors and pumps using a ferrofluidic ring liquid are disclosed there being electrical coil means disposed around the compressor or pump casing to induce a field in the ferrofluidic ring liquid causing that liquid to form a rotating ring within the casing to drive the rotor.
Inventors
- 👤 Harold K. Haavik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:07
CPC Classifications
F; F04; F04C; F04C19/00; F04C19/004; H; H02; H02K; H02K99/00; H02K99/20; F04C2210/00; F04C2210/40; F04C2210/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
A liquid ring pump or compressor comprising a casing, a rotor mounted for rotation within said casing and defining, at least in part, a plurality of working chambers, port means through which a pumped medium is admitted to and discharged from said chambers, said casing including at least a portion eccentric to said rotor, a quantity of ferromagnetic liquid within said chamber whereby, upon rotation of said rotor, said chambers are caused alternately to expand and contract, electrical coil means disposed to induce a field within said casing to cause said ferromagnetic liquid to form a rotating ring, impingement of said ring on said rotor causing the rotor to turn, said coil means and liquid together constituting electrical motor means of which said liquid constitutes a rotor.
Claim 2
Dependent Claim
127 words
A liquid ring pump or compressor comprising a casing, a rotor mounted for rotation within said casing and defining, at least in part, a plurality of working chambers, port means through which a pumped medium is admitted to and discharged from said chambers, said casing including at least a portion eccentric to said rotor, a quantity of ferromagnetic liquid within said chamber whereby, upon rotation of said rotor, said chambers are caused alternately to expand and contract, electrical coil means disposed to induce a field within said casing to cause said ferromagnetic liquid to form a rotating ring, impingement of said ring on said rotor causing the rotor to turn, said coil means and liquid together constituting electrical motor means of which said liquid constitutes a rotor.
Claim 3
Dependent Claim
19 words
Apparatus as claimed in claim 1 wherein said coil means is annular in form and disposed about said casing.
Claim 4
Dependent Claim
33 words
Apparatus as claimed in claim 1 wherein said coil means comprises an annular housing, an inner surface of said housing defining a part of said casing including a portion eccentric to said rotor.
Claim 5
Dependent Claim
16 words
Apparatus as claimed in claim 1 wherein said casing is circular and is mounted for rotation.
Claim 6
Dependent Claim
37 words
Apparatus as claimed in claim 1 wherein said rotor comprises a solid hub and includes a journalling surface for cooperation with a corresponding surface of said casing for supporting said rotor for turning movement within said casing.
Claim 7
Dependent Claim
41 words
Apparatus as claimed in claim 1 wherein port means through which a pumped medium is discharged is connected to a separator, said separator including a magnetized structure upon which a ferromagnetic liquid passing through said port means is caused to impinge.
Claim 8
Dependent Claim
71 words
Apparatus as claimed in claim 6 wherein said separator comprises a vessel, magnetized means within said vessel, an inlet for ferromagnetic liquid and gas to said vessel, means causing a mixture of ferromagnetic liquid and gas admitted to said vessel to impinge on said magnetic means, an outlet for said ferromagnetic liquid disposed towards the lower end of said vessel and an outlet for a gas disposed above said magnetic means.
Claim 9
Dependent Claim
20 words
Apparatus as claimed in claim 7 wherein said magnetized means comprises a shell defining, at least in part, said vessel.
Claim 10
Dependent Claim
21 words
Apparatus as claimed in claim 8 further including a magnetized and reticulate structure disposed between said inlet and said gas outlet.
Claim 11
Dependent Claim
22 words
Apparatus as claimed in claim 7 wherein said magnetized means comprises a reticulate structure disposed between said inlet and said gas outlet.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |