F - Mech Eng,Light,Heat,Weapons – 04 – C
Patent
F - Mech Eng,Light,Heat,Weapons
04
C
230/87
F04C 18/00 (2006.01) F04B 49/02 (2006.01) F04B 49/08 (2006.01) F04C 18/02 (2006.01) F04C 18/04 (2006.01)
Patent
CA 1172221
Title GAS COMPRESSOR OF THE SCROLL TYPE HAVING DELAYED SUCTION CLOSING CAPACITY MODULATION Abstract A gas compressor of the scroll type is disclosed wherein unloader means are provided for selectively vary- ing its capacity by effectively delaying the point at which the closed moving volumes defined between the wrap elements begin compression. To this end, passage means extend through the end plate means of the compressor from a location in communication with the closed moving volumes to a location in communication with working gas normally at suction pressure during operation of the compressor. Valve means are provided for selectively blocking flow through the aforementioned passage means, whereby the compressor operates at a relatively high capacity; and for permitting flow through the passage means, whereby gas is exhausted via the passage means to suction pressure as the closed moving volumes progress radially inwardly to a predetermined position at which compression is per- mitted to begin.
383187
Teegarden Arlo F.
Utter Robert E.
American Standard International Inc.
Fetherstonhaugh & Co.
Trane Company Of Canada Limited
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