Hypodermic syringe with articulate plunger

Details Hypodermic syringe with articulate plunger Hypodermic syringe with articulate plunger

1975-05-19

1977-03-15

Yasko, John D.

Surgery

Respiratory method or device

Ozone or ion generation

128234, A61M 500

Patent

active

040118681

ABSTRACT:
The plunger of a hypodermic syringe has the usual head and shank, but the shank is of articulate construction to permit change from a normal straight operating configuration to an angular configuration, at which angular configuration the shank engages the syringe barrel to control the position of the plunger head. In some embodiments the shank bends through an angle of 180.degree. to lie along the exterior of the barrel and thereby straddle the rim of the barrel to cooperate therewith to limit movement of the plunger head inwardly of the barrel. The straddling folded shank may engage the barrel rim at selected points of the shank to immobilize the plunger head at selected positions. In other embodiments the articulate shank bends through only a small angle to cooperate with the barrel rim to control the plunger head.

REFERENCES:
patent: 1678991 (1928-07-01), Marschalek
patent: 2390246 (1945-12-01), Folkman
patent: 3495591 (1970-02-01), Wilson

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