Dental handpiece

Details Dental handpiece Dental handpiece

Filed on

1976-12-17

Date issued

1978-08-08

Examiner

Peshock, Robert

Other Related Categories

32 26, A61C 108

Type

Patent

Status

active

Patent number

041047990

Description

ABSTRACT:
An axially slidable chuck-actuating internal sleeve of a dental handpiece is biased to a chuck-closing position by a spring, but can be displaced to open the chuck by cooperation with radially-movable balls. These balls are biased outwardly by leaf springs to normally rest in contact with the inner surface of an axially slidable or rotatable external actuating sleeve, whereby the balls remain out of contact with the internal sleeve when it is rotated with the handpiece shaft.

REFERENCES:
patent: 3070380 (1962-12-01), Holmberg
patent: 3631597 (1972-01-01), Lieb
patent: 3803716 (1974-04-01), Garnier

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