Device for actuating a tool fastening and releasing mechanism

Details Device for actuating a tool fastening and releasing mechanism Device for actuating a tool fastening and releasing mechanism

1987-05-19

1988-09-27

Wilson, John J.

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

433129, A61C 114

Patent

active

047738561

ABSTRACT:
A device for releasing a tool from a tool fastening mechanism of a dentist's handpiece comprises a push-piece that is held in an outer, inoperative position by a spring, and a slide mounted on a rotor of the dentist's handpiece. Upon being pressed, the push-piece engages the slide to release a tool fastened in the rotor. In order to prevent the push-piece from overheating when it is in contact with the slide while the slide is rotating at high speed, the push-piece carries a disc and the slide carries a ball. The disc and the ball are for instance made of sintered hard metal and are located where the push-piece and the slide engage such as to have substantially a point contact between them on the rotational axis of the slide.

REFERENCES:
patent: 2895738 (1959-07-01), Baker
patent: 3082528 (1963-03-01), Reid

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