Clearance-controlling means comprising abradable layer and abras

Rotary expansible chamber devices – Non-metallic working member – cylinder or partition

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Details

418178, 418191, 415174, 291564WL, F04C 1820, F04C 2700, F16J 1516

Patent

active

044667850

ABSTRACT:
The embodiment depicted comprises a pair of coacting rotors, in a rotary compressor, having interengaging lobes and grooves, the rotors being journaled in intersecting bores in a housing. The circumferential surfaces, and end walls of the bores are polymer-layered, and the rotors carry abrasive to machine the polymer to define an optimum clearance for rotor rotation within the bores, and in coaction together. Each rotor is polymer-coated and abrasive particles are borne in the polymer on the outer edges of the lobes and in discrete radial patterns on the rotor sides. The method defines the polymer-coating and abrasive particles-deposition steps.

REFERENCES:
patent: 2491678 (1949-12-01), McCullough et al.
patent: 2492935 (1949-12-01), McCullough et al.
patent: 4227703 (1980-10-01), Stalker et al.

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