Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1991-02-26
1991-08-06
Wilson, John J.
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
A61C 114
Patent
active
050372998
ABSTRACT:
A chucking device for a dental handpiece includes a dental bur having a retention groove, a stationary disk having a central opening, a pair of locking members having projecting engaging portions for engaging with the reaction groove, a retention spring for thrusting the locking members towards abutment with each other, and a pushbutton for releasing retention of the bur. When the bur is inserted into the central opening, the retention groove is engaged by the projecting engaging portions of the locking members for retaining and securing the bur within a bur tube. When the pushbutton is pressed down, the locking members are extended apart from each other to release the retention of the retention groove by the projecting engaging portions to permit the bur to be disconnected from the inside of the bur tube.
REFERENCES:
patent: 2911721 (1959-11-01), Staunt
patent: 4398886 (1983-08-01), Schuss et al.
patent: 4573918 (1986-03-01), Bareth
patent: 4661062 (1987-04-01), Seigneurin
Baxley Charles E.
Nakanishi Dental Mfg. Co. Ltd.
Wilson John J.
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