Flow-through vertical filling pump with a plurality of diaphragm

Details Flow-through vertical filling pump with a plurality of diaphragm Flow-through vertical filling pump with a plurality of diaphragm

1996-12-16

1999-04-27

Thorpe, Timothy S.

Pumps

Expansible chamber type

Valved piston

417547, 417549, 417570, 92980, F04B 3900

Patent

active

058973044

ABSTRACT:
A flow-through filling pump for receiving a liquid supply and discharging a predetermined amount of the liquid therefrom includes a housing defining a supply chamber and a discharge chamber and a reciprocating piston positioned in the housing intermediate the supply and discharge chambers. The piston is movable along an axial liquid flow path defined by the chamber, between a fill position and a discharge position. A drive assembly is operably connected to the piston to drive the piston between the fill and discharge positions. A seal member extends between the piston and the housing to isolate the supply and the discharge chambers and at least a portion of the piston from a portion of the housing at which the drive assembly operably connects to the piston. The pump includes a non-return type inlet valve mounted to the piston. The inlet valve has a biasedly mounted valve element, which is biased to the closed position. The inlet valve is moveable with the piston and the valve element is movable relative to the piston to permit and to terminate flow of liquid through the valve into the discharge chamber as the piston is moved between the fill and discharge positions.

REFERENCES:
patent: 200026 (1878-02-01), Burgess
patent: 221494 (1879-11-01), Barnes
patent: 245067 (1881-08-01), Hess
patent: 2776785 (1957-01-01), Lyon
patent: 2894665 (1959-07-01), Zerlin
patent: 3473479 (1969-10-01), Sundholm
patent: 3695787 (1972-10-01), Kraus
patent: 4832583 (1989-05-01), Brown
patent: 4934906 (1990-06-01), Williams
patent: 5090299 (1992-02-01), Santi et al.

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