Hand held device with built-in motor

Details Hand held device with built-in motor Hand held device with built-in motor

1982-10-08

1984-12-04

Skudy, R.

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

310 47, 310103, 310156, 74416, 74DIG4, 335306, A61C 112

Patent

active

044861761

ABSTRACT:
A hand held device with built-in motor for rotational drive of small tools. The hand held device includes an outer housing consisting of a larger diameter rear part which contains an electric driving motor, an intermediate part of small diameter which contains motion transmitting means, and a front part in which is mounted a holder for the tool to be driven. The electric driving motor is a brushless motor having a rotor encapsulated in a sealed insulating enclosure and includes permanent magnets covered with a layer of conducting metal and a stator made up of multi-phase winding coils embedded in a molded plastic material. The motion transmission means consists of non-contacting magnetic coupling means.

REFERENCES:
patent: 2768316 (1956-10-01), Neiss
patent: 3790889 (1974-02-01), Mincuzzi
patent: 3796898 (1974-03-01), Kleinwaechter
patent: 4167848 (1979-09-01), Kitai
patent: 4277707 (1981-07-01), Silver
patent: 4302693 (1981-11-01), Burgmeier

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