Patents Represented by Attorney Newton H. Lee

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  • In-hole motor drill with bit clutch
    Patent number: 4232751
    Abstract: An in-hole motor drill assembly has the rotor of the motor connected to the drill bit by a slidable rotary drive connection, and normally disengaged torque transmitting members are engageable, if desired, to lock the bit and motor housing together for rotation of the bit by rotation of the motor housing. The torque transmitting members also interlock to prevent disengagement when an upward pull is applied during rotation of the bit.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: November 11, 1980
    Assignee: Smith International, Inc.
    Inventor: Kurt H. Trzeciak