Reverse acting rolling diaphragm for expelling liquids

Details Reverse acting rolling diaphragm for expelling liquids Reverse acting rolling diaphragm for expelling liquids

1966-12-16

1976-02-24

Pendegrass, Verlin R.

Dispensing

With discharge assistant

Container with follower

B67D 504

Patent

active

039400310

ABSTRACT:
Disclosure relates to a diaphragm sleeve which is rolled inside out in a tank by a motive fluid supplied to one side thereof to positively displace fluid at the opposite side from the tank. The diaphragm has a wall of a thickness to resist transverse collpase of the sleeve by the motive fluid, but with a thin wall section adjacent a piston at its free end and an annular rib at the outer periphery of the piston to initially fold the diaphragm to promote rolling in opposite directions.

REFERENCES:
patent: 2918936 (1959-12-01), Dawson
patent: 3070265 (1962-12-01), Everett
patent: 3162336 (1964-12-01), Erickson
patent: 3319420 (1967-05-01), Mercier

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