Automatic control of power operated means > Tool advance causing or controlling means > Responsive to torque or speed condition of drive > Drive motor motivating energy condition initiates control > Patents

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Class Information
Number: 173/7
Name: Tool driving or impacting > Automatic control of power operated means > Tool advance causing or controlling means > Responsive to torque or speed condition of drive > Drive motor motivating energy condition initiates control
Description: Apparatus in which means driving the tool comprises a motor, and the sensing means senses a condition of the motor power material or electric current.

Sub-classes under this class:

Class Number	Class Name	Patents
173/8	Motive fluid flow or pressure condition of drive motor	33

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7427842	Series motor and method of controlling the same	Sep. 23, 2008
5121802	Method and arrangement for controlling a rock drilling apparatus	Jun. 16, 1992
4470635	Method and apparatus for excavating a tunnel or gallery face	Sep. 11, 1984
4367900	Mineral mining installation with electronic control	Jan. 11, 1983
4269448	Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded	May. 26, 1981
3988578	Method and apparatus for controlling the steplessly variable cutting rate and feed rate of mining machines	Oct. 26, 1976