US3676021A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial unloader valve for thru-slot rotary compressor
Assignee: Whirlpool Corp
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Filing: 1970-10-09
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Granted: 1972-07-11
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Expires: 1990-10-09
Abstract
Abstract A ROTARY COMPRESSOR SUCH AS FOR USE IN REFRIGERATION APPARATUS HAVING A VANE-TYPE ROTOR. MEANS ARE PROVIDED FOR ALLEVIATING LIQUID FLUID INGESTION IN THE COMPRESSOR DURING START-UP INCLUDING VALVED PASSAGE MEANS FOR RETURNING HIGH PRESSURE LIQUID FLUID FROM THE COMPRESSION CHAMBER TO THE SUCTION INLET DURING START-UP. THE PASSAGE MEANS INCLUDES MEANS FOR PASSING LIQUID FLUID FROM A MUFFLER CHAMBER INTO THE HEAD SPACE DURING START-UP. THE VALVE MEANS IS RESPONSIVE TO THE PRESSURE CONDITIONS WITHIN THE COMPRESSOR TO SUBSTANTIALLY THROTTLE SUCH LIQUID FLUID TRANSFER DURING NORMAL OPERATING CONDITIONS OF THE COMPRESSOR.
Inventors
- 👤 Milton Young Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:42
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/24; F04C28/26; F04D; F04D1/00; F04D1/14; F25; F25B; F25B31/00; F25B31/02; F25B31/026; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |