Piston pump

Details Piston pump Piston pump

1975-11-03

1977-03-01

Cohen, Irwin C.

Expansible chamber devices

Piston

Radially adjustable side wall portion

92249, F16J 106

Patent

active

040096459

ABSTRACT:
A piston pump comprising a cylindrical sleeve member, a tetrafluoroethylene plunger head contained within the sleeve member, at least one O-ring contained within a circular recess concentric with and extending axially from the lower transverse face of and into the plunger head, and a piston rod having one end concentric with and rigidly mounted to this lower transverse face. Also, a pressure cap having a cylindrical uppermost portion dimensioned to fit into the circular recess of the plunger head, is adjustably mounted upon the piston rod, for axially compressing the O-ring(s), causing the O-ring(s) to exert a radial force against and effect a seal of a portion of the circular side walls of the plunger head against the opposing interior wall of the sleeve.

REFERENCES:
patent: 1372262 (1921-03-01), Yount
patent: 1482734 (1924-02-01), Carrow
patent: 1955157 (1934-04-01), Wayne
patent: 3166991 (1965-01-01), Blenkle
patent: 3396637 (1968-08-01), Sessody
patent: 3747479 (1973-07-01), Nightingale et al.

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