US PATENT SUBCLASS 175 / 39
WITH BIT WEAR SIGNAL GENERATING


Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

39WITH BIT WEAR SIGNAL GENERATING


DEFINITION

Classification: 175/39

(under the class definition) Process or apparatus comprising a step or means for initiating a signal when a specified condition relating to wear of the bit occurs.

SEE OR SEARCH CLASS

73, Measuring and Testing,

152.44+, for bit wear indicating involving drill depth-rate.

340, Communications: Electrical,

500+, for electrical automatic condition responsive indicating systems.