Scroll-type two stage positive fluid-displacement apparatus with

Details Scroll-type two stage positive fluid-displacement apparatus with Scroll-type two stage positive fluid-displacement apparatus with

1977-08-15

1979-02-27

Croyle, Carlton R.

Rotary expansible chamber devices

Multistage

One working chamber stage encircles another

418 55, 418 59, F04C 2300, F04C 1702

Patent

active

041416775

ABSTRACT:
The invention comprises a positive fluid displacement apparatus of the scroll type described as a fluid compressor in the exemplary embodiment. The embodiment has single fixed and movable scroll elements in which the latter orbits the former to form variable volume pockets which move from an inlet to an outlet and means are provided for discharging fluid from at least one of the pockets prior to its movement to the outlet port, cooling the vented fluid and returning it to the apparatus for final compression and discharge. Accordingly, by this arrangement, two stages of compression with intercooling are provided in a single apparatus having only a single fixed scroll element and a single movable scroll element.

REFERENCES:
patent: 940817 (1909-11-01), McLean et al.
patent: 1376291 (1921-04-01), Rolkerr
patent: 3994633 (1976-11-01), Shaffer

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