Patent US4127994A successfully refreshed from Google Patents.
US4127994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil stirrer for refrigeration compressor
Assignee: White Westinghouse Corp
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Filing: 1977-01-26
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Granted: 1978-12-05
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Expires: 1997-01-26
Abstract
Abstract A refrigeration motor-compressor assembly resiliently mounted within a hermetically sealed shell having a sump area containing lubricating oil continuously aerated by a stirrer fixed to a rotating shaft of the motor-compressor assembly is disclosed. The stirrer is formed of thin perforated sheet metal or screen mesh shaped into an open-ended truncated cone, the apex portion of which is fixed to the rotating shaft of the motor-compressor assembly while the base portion of the cone is submersed in the lubricating oil contained in the sump area. Aeration of the lubricating oil by the rotating stirrer attenuates the transmission of mechanical noise generated within the hermetically sealed shell.
Inventors
- 👤 Ralph E. Niven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:02
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/0077; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A refrigeration apparatus comprising: a shell containing a gas; a motor compressor assembly mounted within said shell, said motor-compressor assembly having a rotatable shaft with a longitudinal axis of rotation; a body of oil contained within said shell; and an oil stirrer for aerating said body of oil with said gas, said stirrer being fixed to said shaft, said oil stirrer having a portion formed of thin sheet material having a large plurality of closely spaced apertures said material being shaped into an open-ended truncated cone with an apex portion and a base portion, said apex portion being fixed to said shaft and being above said body of oil, said base portion extending into and immersed in said body of oil.
Claim 2
Dependent Claim
121 words
A refrigeration apparatus comprising: a shell containing a gas; a motor compressor assembly mounted within said shell, said motor-compressor assembly having a rotatable shaft with a longitudinal axis of rotation; a body of oil contained within said shell; and an oil stirrer for aerating said body of oil with said gas, said stirrer being fixed to said shaft, said oil stirrer having a portion formed of thin sheet material having a large plurality of closely spaced apertures said material being shaped into an open-ended truncated cone with an apex portion and a base portion, said apex portion being fixed to said shaft and being above said body of oil, said base portion extending into and immersed in said body of oil.
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1 wherein said cone has an axis of rotation coincident with said longitudinal axis of rotation.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 1 wherein said apex portion is fixed to said shaft by a ringlike flange press fitted onto said shaft.
Claim 5
Dependent Claim
15 words
An apparatus according to claim 1 wherein said apertured sheet material is perforated sheet metal.
Claim 6
Dependent Claim
14 words
An apparatus according to claim 1 wherein said apertured sheet material is screen mesh.
Claim 7
Dependent Claim
17 words
An apparatus according to claim 1 wherein said apertured sheet material is a foil-like expanded metal grid.
Claim 8
Dependent Claim
146 words
A refrigeration apparatus comprising: a shell containing a gas; a motor-compressor assembly mounted within said shell, said motor-compressor assembly having a rotatable shaft with a longitudinal axis of rotation; a body of oil contained within said shell; an oil stirrer for aerating said body of oil with said gas, said oil stirrer being fixed to said shaft, said oil stirrer being formed of perforated sheet metal having a plurality of regularly spaced perforations, said sheet metal being shaped into a truncated cone having an open-ended apex portion with an upper edge fixed in relation to said shaft and an open-ended base portion being submerged in said body of oil, said truncated cone having an axis of rotation coincident with said longitudinal axis of rotation; and a ringlike flange press fitted onto said shaft, said flange defining a groove adapted to receive and retain said upper edge.
Claim 9
Dependent Claim
146 words
A refrigeration apparatus comprising: a shell containing a gas; a motor-compressor assembly mounted within said shell, said motor-compressor assembly having a rotatable shaft with a longitudinal axis of rotation; a body of oil contained within said shell; an oil stirrer for aerating said body of oil with said gas, said oil stirrer being fixed to said shaft, said oil stirrer being formed of perforated sheet metal having a plurality of regularly spaced perforations, said sheet metal being shaped into a truncated cone having an open-ended apex portion with an upper edge fixed in relation to said shaft and an open-ended base portion being submerged in said body of oil, said truncated cone having an axis of rotation coincident with said longitudinal axis of rotation; and a ringlike flange press fitted onto said shaft, said flange defining a groove adapted to receive and retain said upper edge.
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |