Medical handpiece

Details Medical handpiece Medical handpiece

1984-12-06

1986-02-04

Wilson, John J.

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

433131, A61C 108

Patent

active

045682836

ABSTRACT:
A handpiece for medical treatment having a brushless micromotor mounted in a handpiece casing for driving a cutting tool and having a coolant passageway formed on the outer periphery of a cylindrical yoke fixed to the frame of the handpiece body. In this handpiece, the coolant passageway is formed helically around the axis of the yoke from one end to the other end of the yoke. The sectional area of the yoke in any given longitudinal sectional position along the axis of the yoke is rendered approximately equal to prevent a reduction in motor torque and also enlargement of the handpiece in diameter.

REFERENCES:
patent: 1912586 (1933-06-01), Lysholm
patent: 1996460 (1935-04-01), Coates
patent: 3487546 (1970-01-01), Beierlein et al.
patent: 4184256 (1980-01-01), Loge et al.

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