Fluid injector

Details Fluid injector Fluid injector

1974-10-31

1976-09-07

Reeves, Robert B.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222496, 101366, B41F 3108

Patent

active

039790282

ABSTRACT:
A fluid injector unit wherein fluid from a chamber is deposited through an outlet passage in the chamber and onto a surface through the action of a first piston which moves in the chamber and a second piston which reciprocates within a bore in the first piston. Self sealing valve means are carried by the second piston and operate to urge the second piston toward a closed position in which it closes the outlet passage against fluid flow. Movement of the first piston within the chamber pressurizes the fluid therein and forces the second piston away from the closed position. Sealing means, also carried by the second piston, are then operative to prevent fluid leakage between the second piston and the bore as well as to act as stop means to regulate the range of motion of the second piston away from the closed position.

REFERENCES:
patent: 1277842 (1918-09-01), Brinser
patent: 2689075 (1954-09-01), Morton et al.
patent: 3178082 (1965-04-01), Winders
patent: 3543682 (1970-12-01), Farrow
patent: 3912133 (1975-10-01), Hehl

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