Hypodermic needle and method of making needles

Details Hypodermic needle and method of making needles Hypodermic needle and method of making needles

1981-06-05

1983-05-17

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 500

Patent

active

043835309

ABSTRACT:
A needle structure for hypodermic needles and the like, and method of making a needle, includes forming the beveled, sharply pointed free end of a thin, hollow needle tube so that the leading tip at the beveled end shields, at least partially, the hollow central portion of the needle tube. Advantageously, a portion of the needle tube behind the needle point diverges relatively slightly from the remainder of the needle tube so as to orient the leading tip at a slight angle with respect to the remainder of the needle tube such that it covers at least a portion of the hollow needle tube. As preferably embodied, the divergent portion is formed as a slightly arcuate segment in the needle tube ust behind the needle point, which can resemble a bulge-like formation in the needle tube. Alternatively, the needle tube can be formed with a single bend to lower the point of the needle leading tip. In a particularly useful embodiment, the present invention can be a relatively large diameter (e.g., about 0.045") needle for use in coronary assist procedures, with a helio coid conductor wire already located within the hollow needle tube.

REFERENCES:
patent: 1125887 (1915-01-01), Schimmel
patent: 1569174 (1926-01-01), Crowther
patent: 2697438 (1954-12-01), Hickey
patent: 2748769 (1956-06-01), Huber
patent: 3099988 (1963-08-01), Ginsburg
patent: 3703174 (1972-11-01), Smith

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