Electric drilling machine

Details Electric drilling machine Electric drilling machine

1985-01-28

1985-08-20

Weldon, Ulysses

Electricity: motive power systems

With signals, meters, recorders or testing devices

74421R, 318305, 340680, G01R 3102

Patent

active

045366888

ABSTRACT:
The machine comprises an electric driving motor, a speed reducer having at least two mechanical ratios coupled to the output shaft of the motor, a device for changing the mechanical ratio and a speed variator of the electric motor. The machine further comprises devices (7, 35, 36, 41) for selecting and displaying the speeds of rotation of the electric motor coupled to the device for changing the mechanical ratio.

REFERENCES:
patent: 3029658 (1962-04-01), Dassance
patent: 4027546 (1977-06-01), Alessio
patent: 4211967 (1980-07-01), Akiyama et al.
patent: 4317176 (1982-02-01), Saar et al.
patent: 4410846 (1983-10-01), Gerber et al.

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