Method and apparatus for controlling the movement of fluid to an

Details Method and apparatus for controlling the movement of fluid to an Method and apparatus for controlling the movement of fluid to an

1977-01-04

1978-04-25

Yasko, John D.

Surgery

Respiratory method or device

Ozone or ion generation

128DIG12, 128276, A61M 500

Patent

active

040857492

ABSTRACT:
A syringe for injecting fluid into a body or for removing body fluids is coupled to move together with the piston of a double acting hydraulic actuator having two chambers. For the purpose of aspirating fluid into the syringe, the second chamber of the actuator has within it a liquifiable gas which exerts a constant pressure on the piston. The expulsion of fluid from the syringe is accomplished by the admission of a hydraulic medium under pressure to the first chamber of the actuator. The apparatus also includes a calibrating mechanism which preselects a quantity of hydraulic medium proportional to the quantity of fluid to be expelled from the syringe.

REFERENCES:
patent: 3605745 (1971-09-01), Hodosh
patent: 3965897 (1976-06-01), Lundquist

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