Handle for dental canal rotary instrument and method of manufact

Details Handle for dental canal rotary instrument and method of manufact Handle for dental canal rotary instrument and method of manufact

1982-02-01

1984-10-23

Wilson, John J.

Dentistry

Apparatus

Tool bit

408226, A61C 302

Patent

active

044785780

ABSTRACT:
This dental canal rotary instrument comprises a handle having a hollow metal sleeve surrounding concentrically the inoperative end of the instrument shank; a suitable plastic material is cast into a mold so as to fill the gap left between the sleeve and the shank to form a plastic core embedding the shank, the latter protruding from at least one of the sleeve ends; a notch is formed in the sleeve for anchoring the sleeve and the plastic core, and a flat face is provided on the embedded shank end, in order to improve the adherence of the sleeve, core and shank to one another.

REFERENCES:
patent: 1499346 (1924-07-01), Chott
patent: 1512920 (1924-10-01), Galvin
patent: 2606366 (1952-08-01), Stevens
patent: 4135847 (1979-01-01), Hemmings

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