Dental handpiece

Details Dental handpiece Dental handpiece

1976-01-02

1977-08-09

Scott, Samuel

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

415503, 32 56, 32 59, F16H 344

Patent

active

040403114

ABSTRACT:
A straight dental handpiece comprising a pair of telescoping housing barrels which can normally swivel relative to each other, one containing a chuck and the other containing a vane type air motor. A change speed transmission is entrained between the motor and the chuck, such transmission being adjustable to change speeds by relative endwise movement of the barrels. Opening and closing of the chuck is accomplished by relative rotation of the barrels while holding down a stop button. A reversing valve, also on the handpiece, is movable into either of two positions relative to one of the barrels to supply air under pressure to either of two passages to drive the motor in one direction or the other.

REFERENCES:
patent: 660411 (1900-10-01), Blum
patent: 2251057 (1941-07-01), Iseman
patent: 3832088 (1974-11-01), Cromie
patent: 3942392 (1976-03-01), Page, Jr. et al.

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