Patent US4894530A successfully refreshed from Google Patents.
US4472949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil separator
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1983-03-28
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Granted: 1984-09-25
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Expires: 2003-03-28
Abstract
Abstract In a refrigeration system comprising a compressor, an oil separator, a condenser, an expansion valve, an evaporator, etc., a groove for oil separation is provided along inner wall of a refrigerant gas supply pipe which connects the oil separator and the compressor, and an oil reservoir is provided at the bottom of the oil separator.
Inventors
- 👤 Hidehiko Fujisawa
- 👤 Kenji Ishizaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:09
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
An oil separator for a refrigeration system including a compressor, an oil separator, a condenser, an expansion valve, and an evaporator, said oil separator comprising: an oil separation room to separte oil from refrigerant gas circulating in said refrigeration system; a refrigerant gas supply pipe connecting a discharge portion of said compressor to said oil separation room; a refrigerant gas discharge pipe connecting said oil separation room to said condenser; an oil reservoir provided at the bottom of said oil separation room; and means defining a groove along inner wall of said refrigerant gas supply pipe terminating in said oil separation room so that centrifugal forces will cause said oil to separate from said refrigerant gas and collect and flow in said groove to said oil separation room.
Claim 2
Dependent Claim
128 words
An oil separator for a refrigeration system including a compressor, an oil separator, a condenser, an expansion valve, and an evaporator, said oil separator comprising: an oil separation room to separte oil from refrigerant gas circulating in said refrigeration system; a refrigerant gas supply pipe connecting a discharge portion of said compressor to said oil separation room; a refrigerant gas discharge pipe connecting said oil separation room to said condenser; an oil reservoir provided at the bottom of said oil separation room; and means defining a groove along inner wall of said refrigerant gas supply pipe terminating in said oil separation room so that centrifugal forces will cause said oil to separate from said refrigerant gas and collect and flow in said groove to said oil separation room.
Claim 3
Dependent Claim
24 words
An oil separator as set forth in claim 1 further including a release pipe connecting said oil reservoir and suction portion of said compressor.
Claim 4
Dependent Claim
41 words
An oil separator as set forth in claim 1 or 2 further including an outlet pipe connecting said refrigerant gas supply pipe and said discharge portion of the compressor, said outlet pipe being disposed eccentrically of said refrigerant gas supply pipe.
Claim 5
Dependent Claim
43 words
An oil separator as set forth in claim 1 or 2 further including an outlet pipe connecting said refrigerant gas supply pipe and said discharge portion of the compressor, said outlet pipe being disposed along a tangent of said refrigerant gas supply pipe.
Claim 6
Dependent Claim
123 words
In an oil separator for use in a refrigeration system for separating oil from refrigerant gas between a compressor and a condenser comprising: means defining a chamber having a refrigerant gas supply pipe connecting a discharge portion of said compressor to said chamber, and a refrigerant gas discharge pipe leading from said chamber to said condenser, the improvement of means defining a spiral groove along an inner wall of said refrigerant gas supply pipe with said spiral groove terminating in said chamber so that centrifugal forces of the flowing refrigerant gas will cause oil to separate from the refrigerant gas and collect and flow along said spiral groove into said chamber; and collection means in said chamber for accumulating oil in said chamber.
Claim 7
Dependent Claim
123 words
In an oil separator for use in a refrigeration system for separating oil from refrigerant gas between a compressor and a condenser comprising: means defining a chamber having a refrigerant gas supply pipe connecting a discharge portion of said compressor to said chamber, and a refrigerant gas discharge pipe leading from said chamber to said condenser, the improvement of means defining a spiral groove along an inner wall of said refrigerant gas supply pipe with said spiral groove terminating in said chamber so that centrifugal forces of the flowing refrigerant gas will cause oil to separate from the refrigerant gas and collect and flow along said spiral groove into said chamber; and collection means in said chamber for accumulating oil in said chamber.
Claim 8
Dependent Claim
59 words
An oil separator as defined in claim 5, in which said chamber has an inner wall leading to said collection means with said accumulated oil flowing along said inner wall to said collection means and said refrigerant discharge pipe has an inlet spaced from said inner wall to prevent accumulated oil in said chamber from flowing through said inlet.
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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |