Spring grip chuck assembly for dental handpieces

Details Spring grip chuck assembly for dental handpieces Spring grip chuck assembly for dental handpieces

1976-11-17

1978-05-16

Peshock, Robert

Chucks or sockets

Radially reciprocating jaws

279 1SG, 279 20, A61C 110

Patent

active

040891151

ABSTRACT:
A dental handpiece having a rotor housing with a chamber, a rotor within the chamber, and an improved spring grip chuck. The chamber has upper and lower openings coaxial therewith, the rotor has a bore aligned with the openings, and the chuck is received within the bore. The chuck is fixed to the bore and has a plurality of tapered spring jaws at its upper end which normally slope inwardly for frictionally contacting and holding a dental bur. The upper end of the bore is provided with a pusher nut which is accessible by means of a suitable wrench through the upper opening in the housing and which is adjustable for engaging and forcing open the jaws to permit removal and replacement of the bur.

REFERENCES:
patent: 2263808 (1941-11-01), Hutchinson
patent: 3376084 (1968-04-01), McKee

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