Five beveled point geometry for a hypodermic needle

Details Five beveled point geometry for a hypodermic needle Five beveled point geometry for a hypodermic needle

1996-06-20

1998-05-19

Buiz, Michael Powell

Surgery

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

Treating material introduced into or removed from body...

A61M 532

Patent

active

057529426

ABSTRACT:
A hypodermic needle featuring a multi-beveled point geometry is disclosed. In one embodiment, the multi-beveled point features a primary bevel, a pair of tip bevels, and a pair of middle bevels each intermediate the primary bevel and a respective one of the tip bevels. The primary and middle bevels are provided at angles of inclination, measured between the central axis and a reference plane that are substantially identical. The tip bevels are formed at an angle of inclination respective to the central axis which is not equal to the angle of inclination at which the primary and middle bevels are formed. The resulting five-beveled point geometry contributes to a more continuous bevel face free of abrupt intercepts or transitions between the respective bevel faces, lessening the penetration force required to urge the needle point through skin, flesh, or other material.

REFERENCES:
patent: 2409979 (1946-10-01), Huber
patent: 2560162 (1951-07-01), Ferguson
patent: 3071135 (1963-01-01), Baldwin et al.
patent: 3308822 (1967-03-01), De Luca
patent: 5536259 (1996-07-01), Utterberg
patent: 5575780 (1996-11-01), Saito

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