Pumps – Expansible chamber type – Distributor moved by separate fluid responsive surface
Patent
1995-04-07
1996-11-05
Gluck, Richard E.
Pumps
Expansible chamber type
Distributor moved by separate fluid responsive surface
417518, 13762518, F04B 702
Patent
active
055710026
ABSTRACT:
A plunger pump system including a plunger pump, and a shuttle valve connected to the plunger pump having a valve body reciprocally fitted in a hollow portion formed in a valve casing to divide the hollow portion into a liquid supply side chamber and a liquid discharge side chamber. The shuttle valve has a liquid supply hole which provides communication between a liquid supply line and the liquid supply side chamber and which is closed by a first end surface of the valve body when the delivery pressure of the liquid is higher than the supply pressure of the liquid. A first connecting hole provides communication between the pump liquid supply hole and the liquid supply side chamber. A liquid discharge hole provides communication between a liquid discharge line and the liquid discharge side chamber and is closed by a second end surface of the valve body when the supply pressure of the liquid is higher than the delivery pressure of the liquid. A second connecting hole provides communication between the pump liquid discharge hole and the liquid discharge side chamber, and prevents generation of dust, leakage of liquid, and occurrence of a failure at a valve driving portion of a plunger pump system.
REFERENCES:
patent: 2930391 (1960-03-01), Bass et al.
patent: 3184812 (1965-05-01), Bennett et al.
patent: 3533429 (1970-10-01), Shoulders
patent: 3631876 (1972-01-01), Misevich
patent: 3704080 (1972-11-01), Cross
patent: 4460152 (1984-07-01), DiPasquale et al.
Ebara Corporation
Gluck Richard E.
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