Chuck assembly for dental handpieces

Details Chuck assembly for dental handpieces Chuck assembly for dental handpieces

1979-09-12

1981-07-21

Mancene, Gene

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

279 50, A61C 114

Patent

active

042795974

ABSTRACT:
An improved positive-grip chuck assembly, particularly suitable for use with high-speed air-driven dental handpieces, in which a tubular chuck has a radially-flexible bur-clamping section provided with an external shoulder, and the bore in which the chuck is received has an internal shoulder engagable with the external shoulder of the bur clamping section of the chuck to flex the bur-clamping section inwardly and to hold the same in a constricted condition for securely gripping the mid-portion of the shank of a dental bur. Piloting contact is made between the chuck and bur along circumferential zones spaced axially from the bur-clamping zone, and the rotor surrounds and braces the chuck portion defining the lower pilot zone to prevent distorting forces applied to the tip of the bur from being propagated to the bur-clamping zone.

REFERENCES:
patent: 351821 (1886-11-01), Weber
patent: 382672 (1888-05-01), Williams
patent: 3627339 (1971-12-01), Burweger
patent: 3637050 (1972-01-01), Hoffmeister
patent: 3798776 (1974-03-01), Lentine et al.
patent: 3888008 (1975-06-01), Lake et al.
patent: 4089115 (1978-05-01), Heil et al.

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