Rotary expansible chamber devices – Multistage
Patent
1983-02-23
1984-10-16
Vrablik, John J.
Rotary expansible chamber devices
Multistage
418 55, F04C 1802, F04C 2300
Patent
active
044772386
ABSTRACT:
A scroll type compressor is disclosed which includes a housing, a fixed scroll and an orbiting scroll. The fixed scroll is fixedly disposed relative to the housing and has a circular end plate from which a first spiral wrap extends. The spiral wraps interfit at an angular and a radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets. The fluid pockets move toward the center of the spiral wraps with consequent reduction of their volume by the orbital motion of the orbiting scroll. The spiral wrap of each scroll has a transition portion between a lower inner portion of the spiral wrap and a higher out portion thereof. The circular end plate of each scroll is provided with a stepped portion between a deeper outer portion of the end plate and a shallower inner portion thereof. The opposed transition and stepped portions are in registry, so that the higher spiral portions engage the deeper end plate portions, and the shorter spiral portions engage the shallower end plate portions.
REFERENCES:
patent: 3874827 (1975-04-01), Young
patent: 4157234 (1979-06-01), Weaver et al.
Sanden Corporation
Vrablik John J.
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