Patent US3663127A successfully refreshed from Google Patents.
US3663127A
Expired / Lapsed
US
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Hermetic compressor oil cooling system
Assignee: Tecumseh Products Co
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Filing: 1970-11-30
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Granted: 1972-05-16
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Expires: 1990-11-30
Abstract
Abstract A hermetic motor-compressor unit of the vertical shaft type having an electric motor mounted above and driving the gas pump of the unit. The motor has its main stator winding wound radially inwardly of the auxiliary or start winding so that the end turns of the main winding are directly in the path of the lubricating oil which is flung from the outlet or outlets of a crankshaft oil passage fed from an oil pump in the sump of the compressor. The relatively cool oil thus directly impinges against and drains downwardly along the main winding to thereby effect more efficient cooling of the motor.
Inventors
- 👤 Robert J Cheers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:30
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19; F; F04; F04B; F04B35/00; F04B35/04; F04B39/00; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246; F04B39/06; F25; F25B; F25B31/00; F25B31/02; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
In a motor-compressor unit having a hermetically sealed casing with communicating motor and compressor chambers, an electric motor arranged in the motor chamber comprising a stator core having run and start windings wound thereon, a rotor disposed within said stator and a motor shaft carrying said rotor for rotation therewith, said motor shaft being drivingly connected to a gas pump of said compressor and having an oil conducting passageway extending axially therethrough, and means for supplying oil from a casing sump to said passageway in said shaft in response to rotation of said rotor, the improvement wherein said start windings are disposed radially outwardly of the portion of said run windings adjacent thereto, said shaft having outlet means connected to said passageway and oriented relative to said run windings such that oil leaving said passageway via said outlet means is directed toward said run windings to effect cooling of the same.
Claim 2
Dependent Claim
151 words
In a motor-compressor unit having a hermetically sealed casing with communicating motor and compressor chambers, an electric motor arranged in the motor chamber comprising a stator core having run and start windings wound thereon, a rotor disposed within said stator and a motor shaft carrying said rotor for rotation therewith, said motor shaft being drivingly connected to a gas pump of said compressor and having an oil conducting passageway extending axially therethrough, and means for supplying oil from a casing sump to said passageway in said shaft in response to rotation of said rotor, the improvement wherein said start windings are disposed radially outwardly of the portion of said run windings adjacent thereto, said shaft having outlet means connected to said passageway and oriented relative to said run windings such that oil leaving said passageway via said outlet means is directed toward said run windings to effect cooling of the same.
Claim 3
Dependent Claim
55 words
The compressor as set forth in claim 1 wherein said run windings have end turns projecting axially beyond at least one axial end face of said stator core and said outlet means comprises at least one outlet located axially between said end face of said core and the axially outermost portion of said end turns.
Claim 4
Dependent Claim
46 words
The compressor as set forth in claim 2 wherein said rotor has a plurality of blades thereon disposed radially between said shaft and said end turns of said run windings and located in the path of oil flow from said one outlet to said end turns.
Claim 5
Dependent Claim
31 words
The compressor as set forth in claim 2 wherein said shaft is oriented upright, said motor is disposed above said gas pump and said sump is disposed below said gas pump.
Claim 6
Dependent Claim
34 words
The compressor as set forth in claim 4 wherein said one outlet is located at the upper end of said shaft and said end turns comprise the upper end turns of said run windings.
Claim 7
Dependent Claim
55 words
The compressor as set forth in claim 5 wherein said outlet means includes a second outlet leading from said passageway to a space in said motor chamber below said rotor and stator core, said run windings having lower end turns projecting beneath said stator core into the path of oil emerging from said second outlet.
Claim 8
Dependent Claim
92 words
The compressor as set forth in claim 1 wherein said run and start windings are wound in distributed fashion through a plurality of said slots on said core such that said run winding has first and second end turns projecting respectively axially beyond the axially opposite ends of said stator core and each of said end turns is arranged as an annulus concentrically encircling said shaft, and said outlet means comprises first and second outlets oriented to direct oil from said passageway radially outwardly toward said first and second end turns respectively.
References Cited (Backward Citations)
US2435108A
Cited
US3075106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |