Pumps – Motor driven – Fluid motor
Patent
1982-09-23
1984-10-23
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
91311, 91314, F04B 4306
Patent
active
044785607
ABSTRACT:
A fluid-operated reciprocating pump having a central housing, a pair of chamber housings attached to opposite sides of the central housing, and a pumping diaphragm in each chamber housing that separates an inner pressure chamber from an outer pressure chamber. Each outer pressure chamber is connected to an inlet manifold and a discharge manifold, and one-way check valves control the flow of the material being pumped through the chamber. The pumping diaphragms are connected together by a connecting rod that extends through the central housing. The central housing defines inlet and outlet ports for operating fluid, a reversing valve chamber, a pilot valve chamber, and passages connecting the reversing valve chamber to the pilot valve chamber, the inlet port and the inner pressure chambers. A reversing valve is slidably mounted in the reversing valve chamber to control the supply of operating fluid to alternate from one inner chamber to the other, and a pilot valve is slidably mounted in the pilot valve chamber to control the movement of the reversing valve. The pilot valve is controlled by a pair of lever assemblies engaged and pivoted by the connecting rod and located within the central housing.
REFERENCES:
patent: 2178850 (1939-11-01), Dall
patent: 2239727 (1941-04-01), Mayer
patent: 2887955 (1959-05-01), Owen
patent: 2977040 (1961-03-01), Dulebohn
Smith Leonard E.
The Warren Rupp Company
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