专利名称：In-hole motor drill with bit clutch发明人：Kurt H. Trzeciak申请号：US05/957179申请日：19781102公开号：US04232751A公开日：19801111
摘要：An in-hole motor drill assembly has the rotor of the motor connected to thedrill bit by a slidable rotary drive connection, and normally disengaged torquetransmitting members are engageable, if desired, to lock the bit and motor housingtogether for rotation of the bit by rotation of the motor housing. The torque
transmitting members also interlock to prevent disengagement when an upward pull isapplied during rotation of the bit.
申请人：SMITH INTERNATIONAL, INC.
代理人：Philip Subkow,Bernard Kriegel,Newton H. Lee
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