Variable displacement diaphragm pump

Details Variable displacement diaphragm pump Variable displacement diaphragm pump

1988-01-11

1989-08-15

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Having means to hold or resist movement of pumping element

417413, 92 132, 92 84, F04B 4900

Patent

active

048569666

ABSTRACT:
A power source (14) rotates an eccentric (20) engaged within the center of a relatively large drive roller (22) to rotate the drive roller while simultaneously orbiting the center of the drive roller about a circular path so as to cyclically advance and retract from piston assemblies (24) located within pump assemblies (16a-16d). Rotation of the eccentric (20) causes each piston assembly (24) to cyclically advance against and retract from a flexible diaphragm (26) to cause fluid entering the pump assembly to be forced out under pressure. Each diaphragm (26) is "backed" by a spring-loaded support (27) that resiliently pushes against the side of the diaphragm opposite the piston assembly.

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