Pumps – Motor driven – Fluid motor
Patent
1997-08-26
1999-09-28
Freay, Charles G.
Pumps
Motor driven
Fluid motor
417393, F04B 4306
Patent
active
059576707
ABSTRACT:
A pump having a center section including an actuator housing and an air valve is arranged with air chambers to either side of the actuator housing. Diaphragms are associated with the air chambers to create enclosed cavities for alternately pressurizing and venting the air chambers. Pumping chambers are positioned outwardly of the diaphragms and assembled with intake and exhaust manifolds and one-way valves to pump materials with operation of the diaphragms. The actuator uses a pilot shifting shaft which is shuttled by movement of the diaphragms. An air valve is controlled by the pilot shifting shaft to control flow to and from the air chambers. Diffusers include outwardly tapered oblong holes with ports from the air valves. An expansion chamber surrounds the diffusers and a exit to a standard muffler provides a smaller cross-sectional area than the diffuser outlet cross-sectional area.
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Duncan Gregory S.
Forman Eric L.
Freay Charles G.
Ratcliffe Paul L.
Wilden Pump & Engineering Co.
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