Single-use skin puncture device

Details Single-use skin puncture device Single-use skin puncture device

1989-09-26

1991-06-25

Rosenbaum, C. Fred

Surgery

Instruments

Cutting, puncturing or piercing

A61B 1732

Patent

active

050263889

ABSTRACT:
A single-use puncture device having an escapement assembly, a cylindrical sidewall and a helical spring encircling a lance. The escapement assembly includes cantilevered catch members which abut a stop turn of the helical spring to hold the helical spring in a stressed condition. Pressure at the front end of the puncture device causes a deformation of a thin diaphragm which supports the cantilevered catch members at ends opposite the abutment to the stop turn. The deformation is a flexing which moves the catch members radially outwardly to release the stop turn. The spring thrusts the lance forwardly from an armed position to a propelled position in which the puncture point of the lance extends from the front end of the device. The helical spring thereafter recoils to locate the lance in a neutral position encased within a housing. Rearmament of the device is thereby prevented. The front end of the puncture device includes the central access aperture, a skin-engagement region outward of the access aperture, a raised annulus which defines the skin-engagement region, and the thin flexible diaphragm.

REFERENCES:
patent: 3623475 (1971-11-01), Sanz et al.
patent: 4375815 (1983-03-01), Burns
patent: 4416279 (1983-11-01), Lindner et al.
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patent: 4580564 (1986-04-01), Andersen
patent: 4637403 (1987-01-01), Garcia et al.
patent: 4653513 (1987-03-01), Dombrowski
patent: 4715374 (1987-12-01), Maggio
patent: 4787398 (1988-11-01), Garcia et al.
patent: 4794926 (1989-01-01), Munsch et al.
patent: 4817603 (1989-04-01), Turner et al.

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