US PATENT SUBCLASS 173 / 8
.~.~.~.~ Motive fluid flow or pressure condition of drive motor

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

2  DF  AUTOMATIC CONTROL OF POWER OPERATED MEANS {4}
4  DF  .~ Tool advance causing or controlling means {2}
5  DF  .~.~ Responsive to torque or speed condition of drive {3}
7  DF  .~.~.~ Drive motor motivating energy condition initiates control {1}
8.~.~.~.~ Motive fluid flow or pressure condition of drive motor

DEFINITION

Classification: 173/8

(under subclass 7) Apparatus in which the drive motor power material comprises a fluid which operates a fluid motor (e.g., expansible chamber type motor or turbine).

(1) Note. Included under this definition are those motors which derive power solely from the pressure or flow of a fluid stream. An internal combustion engine, for example, which may utilize a fluid fuel, but requires a chemical reaction to operate, is excluded from this definition.