Pump actuator assembly

Details Pump actuator assembly Pump actuator assembly

1980-06-05

1987-05-26

Look, Edward K.

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

417383, F01B 1900

Patent

active

046675752

ABSTRACT:
Pump actuator assembly for use in operating a pump for supplying intravenous liquid to a patient which comprises a housing having a sealed chamber therein with a portion thereof being covered by a flexible membrane. A plunger is mounted in the housing so that a portion thereof is disposed in the sealed chamber for movement between innermost and outermost positions. A constant quantity of liquid fills the sealed chamber. A booth encloses the portion of the plunger disposed in the fluid. A liquid-tight seal is provided between the booth and the housing to permit the plunger to be moved between the innermost and outermost positions so that the flexible membrane can be caused to move between extended and retracted positions.

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patent: 3183672 (1965-05-01), Morgan
patent: 3212447 (1965-10-01), Browne
patent: 3680789 (1972-08-01), Wagner
patent: 3976402 (1976-08-01), Lundquist
patent: 4047850 (1977-09-01), Berthelot

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