Progressive cavity pump or motors

Rotary expansible chamber devices – Unlike helical surfaces on relatively wobbling rotating...

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F04C 2107

Patent

active

054744326

ABSTRACT:
A stator assembly for a progressive pump or motor, comprising a resilient material stator (10) having a helical bore (12) therethrough, the cylindrical outer surface (14) of the stator having a plurality of axially extending circumferentially spaced outward projections (16). A rigid generally tubular member (22) has cooperating recesses (24) and may be formed of a unitary tube or of a plurality of shell elements with a cooperating clamp arrangement (32-36). The side faces (18,20) of the projections are flat and either parallel to one another or are inclined towards one another in the radially outward direction.

REFERENCES:
patent: 3011445 (1961-12-01), Bourke
patent: 3857654 (1974-12-01), Streicher
patent: 4029443 (1977-06-01), Burnside
patent: 4313717 (1982-02-01), Kopecky

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