Global worm machine with seizure-preventing cells

Details Global worm machine with seizure-preventing cells Global worm machine with seizure-preventing cells

1982-12-09

1985-01-08

Smith, Leonard E.

Rotary expansible chamber devices

With removal or accommodation of solid foreign material in...

418195, 418196, F04C 1812, F04C 2900

Patent

active

044925425

ABSTRACT:
A screw is adapted to cooperate with a casing and at least one pinion-wheel for compressing or expanding a fluid within the space located between two screw threads, the casing and a tooth of the pinion-wheel. The casing and crests of the threads carry two cooperating surfaces, and at least part of one of the surfaces comprises lands defining continuity of the surface but being discontinued along any circle centered on the axis of the screw. The lands separate cells which trap formative seizure particles and, thus, reduce the clearance needed between the screw and the casing.

REFERENCES:
patent: 3393666 (1963-07-01), Yamamoto
patent: 3752606 (1973-08-01), Zimmern
patent: 3999906 (1976-12-01), Goloff
patent: 4295802 (1981-10-01), Peschke

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