Method of producing elastomeric stators for eccentric helical pu

Details Method of producing elastomeric stators for eccentric helical pu Method of producing elastomeric stators for eccentric helical pu

1989-07-28

1991-02-12

Gorski, Joseph M.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

2988802, 29888021, B23P 1500, F01C 110

Patent

active

049912925

ABSTRACT:
A method of producing elastomeric stators for eccentric helical pumps, with the elastomer shrinking after the stator has been produced. To increase the precision of the pump cavity, this cavity is first made larger than desired. The closed metallic annular casing that surrounds the stator on the outside is then reduced in diameter, for example via a die. In so doing, the elastomer is radially compressed to thereby bring the pump cavity to a precise inner dimension that is a function of the reduction of the casing diameter and is hence independent of the shrinkage.

REFERENCES:
patent: 3857654 (1974-12-01), Streicher
patent: 4232541 (1980-11-01), Stump
patent: 4338068 (1982-07-01), Suh et al.

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