US PATENT SUBCLASS 173 / 157
.~.~ Common control element for advance and drive motors

Current as of: June, 1999
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173 /   HD   TOOL DRIVING OR IMPACTING

141  DF  ADVANCE CAUSING OR CONTROLLING MEANS {6}
152  DF  .~ Motor causes or controls advance {8}
157.~.~ Common control element for advance and drive motors {1}
158  DF  .~.~.~> With relatively movable advance motor control element

DEFINITION

Classification: 173/157

(under subclass 152) Apparatus in which the tool is driven by a separate motor, and a single element is provided to start and stop or regulate the flow of motivating energy to both the drive motor and the motor for causing or controlling forward movement of the tool.

SEE OR SEARCH THIS CLASS, SUBCLASS:

153, for a means for causing or controlling advance in which drive motor exhaust is motive fluid for an advance motor.

154, for a means for causing or controlling advance in which the drive motor generates advance motor motive energy.

155, for a means for causing or controlling advance in which the advance motor exhaust is motive fluid for a drive motor.