Device for locking a tool in a dental handpiece

Details Device for locking a tool in a dental handpiece Device for locking a tool in a dental handpiece

1978-04-20

1980-11-18

Mancene, Louis G.

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

A61C 114

Patent

active

042343089

ABSTRACT:
This device for locking a dental tool in a handpiece of the contra-angle type comprises a keeper plate slidably mounted on the external surface of the holder and rigidly associated with a control member formed with a thumb-piece consisting of an inclined surface portion thereof. A keyhole formed in the keeper plate is engaged by a suitable shaped end portion of the tool shank so that when the keeper plate is moved to its release position the tool shank can pass through the larger portion of the keyhole and when the plate is in its locking position to which it is urged by a return spring the end portion of the tool shank engages the narrow portion of the keyhole.

REFERENCES:
patent: 462896 (1891-11-01), Eddy
patent: 870825 (1907-11-01), Hardy
patent: 1688136 (1928-10-01), Chayes et al.
patent: 2010421 (1935-08-01), Terry
patent: 2231969 (1941-02-01), Tifft
patent: 2591772 (1952-04-01), Bjorklund
patent: 2726449 (1955-12-01), Tirocchi
patent: 3499223 (1970-03-01), Lieb et al.
patent: 3909946 (1975-10-01), Watanabe

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