Scroll machine with reverse rotation protection

Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve

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Details

417434, 417505, 418 555, 418180, F04B 4900, F01C 104

Patent

active

056072880

ABSTRACT:
A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine. Biasing means is located within the scroll machine in order to control the rate at which the intermediate pressurized fluid is bled to the suction zone of the compressor.

REFERENCES:
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patent: 4877382 (1989-10-01), Caillat et al.
patent: 4968232 (1990-11-01), Kikuchi
patent: 5074761 (1991-12-01), Hirooka et al.
patent: 5102316 (1992-04-01), Caillat et al.
patent: 5156539 (1992-10-01), Anderson et al.
patent: 5167491 (1992-12-01), Keller, Jr. et al.
patent: 5169294 (1992-12-01), Barito
patent: 5240389 (1993-08-01), Oikawa et al.
patent: 5336058 (1994-08-01), Yokoyama

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