Dispenser preferably driven by compressed-air for continuously d

Details Dispenser preferably driven by compressed-air for continuously d Dispenser preferably driven by compressed-air for continuously d

1979-09-26

1981-06-23

Skaggs, H. Grant

Dispensing

With discharge assistant

Motor operated

222372, 417401, 91290, 91303, 91454, G01F 1100

Patent

active

042745616

ABSTRACT:
A compressed-air operated dispenser for continuously dispensing a substance enclosed in a container, and in particular a viscous or paste-like substance, comprising an outlet passage extending from container to an outlet; a valve which normally closes the passage; a compressed-air operated piston arranged to exert pressure on a substance in the passage and to open the valve; and a trigger means for initiating the supply of compressed air for the purpose of operating said piston.
In accordance with the invention there is provided a second valve arranged to move the piston to a starting position in which a pressure-actuating chamber is closed on one side of the piston with the exception of a passage through which compressed air can be forced into the chamber to cause the piston to move to a first terminal position. In this position the substance is subjected to pressure and the valve is opened and the piston ceases to act on the second valve. An air-return passage is opened to cause the second valve to be moved to a second position, in which an exhaust hole for compressed air in said chamber is placed in communication with atmosphere and the piston returns to a second terminal position in which it causes the second valve to return to its starting position.

REFERENCES:
patent: 1939943 (1933-12-01), Bates
patent: 2100092 (1937-11-01), Tear
patent: 3963383 (1976-06-01), Hill

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