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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 pisto

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.

대표청구항 ▼

[ What is claimed is:] [1.] A flow-through filling pump for receiving a liquid supply and discharging a predetermined amount of the liquid therefrom, comprising:a housing defining a supply chamber and a discharge chamber, the supply chamber being in flow communication with the liquid supply, the sup

[ What is claimed is:] [1.] A flow-through filling pump for receiving a liquid supply and discharging a predetermined amount of the liquid therefrom, comprising:a housing defining a supply chamber and a discharge chamber, the supply chamber being in flow communication with the liquid supply, the supply chamber and the discharge chamber defining a liquid flow path;a piston positioned in the housing intermediate the supply chamber and the discharge chamber, the piston being movable along the axial liquid flow path between a fill position and a discharge position;a drive assembly operably connected to the piston and configured to move the piston in a reciprocating manner between the fill and discharge positions;a seal member including a plurality of flexible diaphragms each extending between the piston and the housing, the seal member configured so as 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; andan inlet valve including a valve element mounted to the piston and moveable therewith, the valve element being further 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 position and the discharge position.