Apparatus for pumping a powdery or granular material

Details Apparatus for pumping a powdery or granular material Apparatus for pumping a powdery or granular material

1981-08-14

1983-09-20

Look, Edward K.

Pumps

Successive stages

With interstage intake or additional inlet to latter stage

406 98, 417259, 417900, F04B 300

Patent

active

044052898

ABSTRACT:
Apparatus for pumping a powdery or granular material has a first cylinder and a second cylinder parallel to each other and each having a front end and a rear end, a connector box connecting the respective rear ends of the cylinders for placing them in communication, a material inlet at the front end of the first cylinder, a material outlet at the front end of the second cylinder, a first piston in the first cylinder and a first piston rod connected thereto and extending out of the first cylinder, a second piston in the second cylinder and a second piston rod connected thereto and extending out of the cylinder, and a reciprocating drive connected to the piston rods for reciprocating the pistons simultaneously in the same directions within the respective cylinders, the pistons each having openings therethrough and a first one-way valve on the first piston normally closing the opening therein and opening when the first piston is moving in the forward direction and a second one-way valve on the second piston normally closing the opening therein and opening when the second piston is moving in the rearward direction.

REFERENCES:
patent: 251956 (1882-01-01), Shaffer
patent: 2408765 (1946-10-01), Erickson
patent: 3010232 (1961-11-01), Skakel et al.
patent: 3423131 (1969-01-01), Weeks

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