US PATENT SUBCLASS 173 / 71
.~.~ With means to inhibit return of detritus into cleansing passage

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

197  DF  WORK CLEANSING {10}
59  DF  .~ By motive fluid for drive motor or advance causing or controlling motor {7}
71.~.~ With means to inhibit return of detritus into cleansing passage

DEFINITION

Classification: 173/71

(under subclass 59) Apparatus in which means are provided for the purpose of preventing unwanted material (such as material removed from the work face) from entering the motor through a cleansing fluid passage.