Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1978-11-21
1980-12-02
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 47, 310154, 32 26, H02K 900
Patent
active
042373930
ABSTRACT:
A drive section for a dental handpiece having a housing with means for connection to a supply hose and means for connection to a grip section of the handpiece, the housing receiving a drive motor having a stator surrounding a rotor and at least one coolant line section extending therethrough in a direction parallel to the axis of the drive section, characterized by the stator consisting of a hard metallic material with at least one section of soft metallic material, each section being a portion of the circumference of the stator and extending the length thereof, and each section having a means for receiving a portion of the coolant line. Preferably, the stator has a cylindrical configuration in which the sections form a segment of the cylindrical configuration and are provided with a longitudinally extending bore which forms a portion of the coolant line. If the drive motor is an electrical motor, the stator has a pair of half shells of a permanent magnetic material which are separated by a pair of sections which are of soft magnetic material and act as intermediate yokes.
REFERENCES:
patent: 1892997 (1933-01-01), Oldenburg
patent: 2513226 (1950-06-01), Wylie
patent: 3487546 (1970-01-01), Beierlein
patent: 3604960 (1971-09-01), Krestel
patent: 3798775 (1974-03-01), Weinberg
patent: 3900952 (1975-08-01), Landgraf
patent: 3936940 (1976-02-01), Loge
patent: 4007529 (1977-02-01), Fleer
Siemens Aktiengesellschaft
Skudy R.
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