Retractable safety needles

Details Retractable safety needles Retractable safety needles

1987-03-27

1988-11-01

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604171, 604198, A61M 500

Patent

active

047816929

ABSTRACT:
A flexible plastic catheter extends from a distal end of a rigid plastic housing. An elastomeric seal at the distal end of the housing tightly fits within the housing and grips in its bore a stylet. The stylet has a sharp distal end and an enlarged proximal end which receives a distal end of a plastic tube within the housing. The stylet is slideable within the elastic seal. In an extended position, the stylet distal end extends beyond a distal end of the catheter and the proximal end abuts the elastomeric seal. In a retracted position, the elastomeric seal grips the catheter near its distal end and the proximal end abuts a constriction in the proximal end of the housing. In that retracted position, the tubing, the stylet and the catheter form a fluid flow path.

REFERENCES:
patent: 3055361 (1962-09-01), Ballard
patent: 3536073 (1970-10-01), Farb
patent: 3572334 (1971-03-01), Petterson
patent: 3670727 (1972-06-01), Reiterman
patent: 3769975 (1973-11-01), Nimoy et al.
patent: 3906946 (1975-09-01), Nordstrom
patent: 3910272 (1975-10-01), Forberg
patent: 4160450 (1979-07-01), Doherty
patent: 4362156 (1982-12-01), Feller, Jr. et al.
patent: 4425120 (1984-01-01), Sampson et al.

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