Piston operated pump for viscous materials

Details Piston operated pump for viscous materials Piston operated pump for viscous materials

1979-12-31

1982-03-02

Tollberg, Stanley H.

Dispensing

With discharge assistant

With discharge volume varying means

222 66, 222186, 222341, B67D 502

Patent

active

043175309

ABSTRACT:
Disclosed is an improved piston operated pump for viscous materials wherein the entrapment of air bubbles in the viscous material is reduced by placing a spring in the pump cylinder. The spring is the same diameter as the pump cylinder and is about as long as the length of travel of the piston. The spring is conical in shape so that it may be fully compressed without substantially affecting the capacity of the pump cylinder or the length of the piston stroke.

REFERENCES:
patent: 1230061 (1917-06-01), Blanchette
patent: 1349994 (1920-08-01), Wood
patent: 2488266 (1949-11-01), Brenn
patent: 2661874 (1953-12-01), Appell
patent: 2765964 (1956-10-01), Hanlon
patent: 3248950 (1966-05-01), Pursell et al.
patent: 3492876 (1970-02-01), Bull et al.

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