US3796522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor
Assignee: Hitachi Ltd
•
Filing: 1971-06-28
•
Granted: 1974-03-12
•
Expires: 1991-06-28
Abstract
Abstract A compressor for use in a compression type refrigeration cycle, in which the direction of a refrigerant flow passage is sharply changed at the refrigerant suction port, whereby lubricating oil mixed in the refrigerant in the refrigeration cycle is effectively separated and thereafter collected rapidly by making use of the dynamic pressure of said refrigerant and a pump.
Inventors
- 👤 R Oshima
- 👤 S Miyamoto
- 👤 K Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:29
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/08; F04B27/10; F04B27/1036; F04B27/109; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/102; F04C29/00; F04C29/02; F04C29/025; F04B23/00; F04B23/04; F04B23/08; F04B23/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
A compressor used in compression type refrigeration cycles having suction passage means, oil separating means and oil pump means for supplying lubricating oil to said compressor provided with a suction port, said oil separating means comprising a vertical passage portion in the suction passage means, a horizontal passage portion substantially perpendicular to and intersecting with said vertical passage portion, and an oil separating chamber in said vertical passage portion beyond the intersection with said horizontal passage portion, said oil separating chamber having substantially the same cross-section as said vertical passage portion, said oil separating chamber having a bottom portion directly communicated with said suction port of said oil pump means for returning the oil from said separating chamber to said oil pump means.
Claim 2
Dependent Claim
123 words
A compressor used in compression type refrigeration cycles having suction passage means, oil separating means and oil pump means for supplying lubricating oil to said compressor provided with a suction port, said oil separating means comprising a vertical passage portion in the suction passage means, a horizontal passage portion substantially perpendicular to and intersecting with said vertical passage portion, and an oil separating chamber in said vertical passage portion beyond the intersection with said horizontal passage portion, said oil separating chamber having substantially the same cross-section as said vertical passage portion, said oil separating chamber having a bottom portion directly communicated with said suction port of said oil pump means for returning the oil from said separating chamber to said oil pump means.
Claim 3
Dependent Claim
35 words
A compressor according to claim 1 wherein an oil collecting means of a smaller diameter than said oil separating chamber is provided at the bottom of said chamber in communication with said oil pump means.
Claim 4
Dependent Claim
50 words
A compressor according to claim 1 wherein said suction port of said oil pump means consists of a main suction port and an auxiliary suction port said oil separating chamber being in communication with said auxiliary suction port and said main suction port being in communication with an oil pan.
Claim 5
Dependent Claim
52 words
A compressor as defined in claim 3, wherein said main suction port is open in said pump at a location where the pump is in the initial stage of its suction stroke and said auxiliary suction port at a location where said pump is in the latter stage of its suction stroke.
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |