Incremental actuator for syringe

Details Incremental actuator for syringe Incremental actuator for syringe

1984-02-21

1986-05-20

Andrews, Melvyn J.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604208, 222309, 222391, A61M 5315

Patent

active

045898707

ABSTRACT:
A manually operated actuator is described with which small incremental motions of a rod are obtained to advance a piston of a prefilled syringe. The device employs a reciprocally actuated drive element with a hole through which the rod passes freely when the drive element is in a release position. When the drive element is pivoted to a rod engaging position a pair of edges formed by the hole engage the rod and advance it an increment depending upon the amount of linear movement of the drive element. A back-up inhibitor is employed to prevent the rod from moving back when the drive element is returned to a release position. The back-up inhibitor is syringe responsive by employing a mechanism which causes engagement of the rod by the inhibitor when a syringe is attached to the actuator housing. A syringe with specially adapted flanges is described for use with the actuator.

REFERENCES:
patent: 3337095 (1967-08-01), Marbach et al.
patent: 3598120 (1971-08-01), Mass
patent: 3905365 (1975-09-01), Colombo
patent: 4022207 (1977-05-01), Citrin
patent: 4072254 (1978-02-01), Cox
patent: 4444335 (1984-04-01), Wood et al.

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