Dual diaphragm pump

Details Dual diaphragm pump Dual diaphragm pump

1985-08-29

1987-11-24

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

13759612, F04B 4306

Patent

active

047086017

ABSTRACT:
A pneumatically operated reciprocating three-way valve having particular application to a double diaphragm pump. The valve is operative without a lubricating oil mist or the inefficiency resulting from air leakage between the valve piston and cylinder. Sticking and stalling of the valve piston are prevented by deformation of the cylinder under pressure to provide leakage of selected cavities within the valve. The pump also avoids the use of a deicer mist by an adjustable bleed of high pressure air to provide a two-step exhaust.

REFERENCES:
patent: 4406596 (1983-09-01), Budde
patent: 4566867 (1986-01-01), Bazan et al.

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