Blood sample needle support and ejection mechanism

Details Blood sample needle support and ejection mechanism Blood sample needle support and ejection mechanism

1992-06-22

1993-04-13

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604243, 128763, A61M 500

Patent

active

052017168

ABSTRACT:
A blood specimen collecting system utilizes a disposable needle assembly and standard blood collection and receiving tubes of the type sealed by a pierceable septum. The system includes a hollow cylindrical support adapted to receive a blood collection tube through a rear end thereof and support the needle assembly at a front end thereof. A needle support and ejection mechanism includes a pivotable lever assembly having first and second retainer bracket arms designed to cooperatively engage opposing surfaces of a needle assembly base. The lever assembly is pivotally biased to a first position wherein the first retainer bracket arm applies force to the needle assembly base to bias the needle assembly rearwardly into a small aperture of the cylindrical support. When the lever assembly is manually actuated to overcome the biasing force and is pivoted into a second position, the first retainer bracket arm is disengaged from the forwardly facing portion of the needle assembly base, and then the second retainer bracket arm engages the needle assembly base to apply a forwardly directed ejection force to remove the needle assembly from the hollow cylindrical support.

REFERENCES:
patent: 2806473 (1957-09-01), Lingley
patent: 4822343 (1989-04-01), Beiser
patent: 4907600 (1990-03-01), Spencer
patent: 4976271 (1990-12-01), Blair
patent: 5000167 (1991-03-01), Sunderland

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