High viscosity material pump having valved priming piston

Details High viscosity material pump having valved priming piston High viscosity material pump having valved priming piston

1994-10-18

1997-02-25

Thorpe, Timothy

Pumps

Successive stages

Reciprocating rigid stages

417489, 417513, F04B 700

Patent

active

056054467

ABSTRACT:
A reciprocable liquid pump having a priming cylinder affixed beneath the lower valve housing, and a priming piston rod affixed to the lower end of the pump piston valve assembly. A priming piston and priming valve are affixed to the lower end of the priming piston rod, the priming piston being slidable over a limited range of movement along the priming piston rod and having a central opening with a beveled valve seat. The priming valve forms a conical valve surface which is engageable against the priming piston valve seat to provide a controllable flow path through the center opening of the priming piston.

REFERENCES:
patent: 693920 (1902-02-01), Sterrett
patent: 2615401 (1952-10-01), Mock
patent: 2723625 (1955-11-01), Nichols
patent: 3160105 (1964-12-01), Sherman et al.
patent: 4014629 (1977-03-01), Elsworth
patent: 4591315 (1986-05-01), Fekete
patent: 4591316 (1986-05-01), Fekete
patent: 4708597 (1987-11-01), Fekete
patent: 4740141 (1988-04-01), Fekete
patent: 4875833 (1989-10-01), Canaud et al.
patent: 5067882 (1991-11-01), De Vries et al.
patent: 5147188 (1992-09-01), Schaefer

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