Metering diaphragm pump having a front removable hydraulic refil

Details Metering diaphragm pump having a front removable hydraulic refil Metering diaphragm pump having a front removable hydraulic refil

1999-05-11

2000-07-11

Freay, Charles G.

Pumps

Expansible chamber type

Having separate noncyclic valve

4174131, 417454, F04B 2300

Patent

active

060863404

ABSTRACT:
A hydraulic refill valving apparatus can be removed from the front of a metering pump without requiring the entire displacement chamber to be removed from the pump drive mechanism. The valving apparatus separately mounts a mechanically actuated refill valve and a refill check valve such that they can be removed from the front of the pump with relative ease, leaving the displacement chamber connected to the drive mechanism with the sealing gasket therebetween. By separating the refill valve and refill check valve functions into two separate assemblies, the apparatus is made more reliable in that it is less susceptible to problems encountered with relatively high viscosity working fluid.

REFERENCES:
patent: 1627257 (1927-05-01), Stevens
patent: 2578746 (1951-12-01), Scherger et al.
patent: 2919650 (1960-01-01), Wiggermann
patent: 3551076 (1970-12-01), Wilson
patent: 3680981 (1972-08-01), Wagner
patent: 3902826 (1975-09-01), Nagel et al.
patent: 4192223 (1980-03-01), Lombard
patent: 4390324 (1983-06-01), Karliner
patent: 4474540 (1984-10-01), Bonastia et al.
patent: 5165869 (1992-11-01), Reynolds
patent: 5655885 (1997-08-01), Chung
Milton Roy Metering Pump Technology--Bulletin 210 (dated Jul. 1998).
PULSA Series.RTM. Diaphragm Metering Pumps--Installation Operation Maintenance Instruction, Bulletin No. PMP-IOM-96.
LEWA--Fluid Metering--The Full Range, dated Nov. 1995.

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