Patents by Inventor Clairdel C. Cox

Clairdel C. Cox has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Control system for rotary drill
    Patent number: 4067423
    Abstract: A mobile rig for drilling blast holes comprises a rotatable drill holder mounted on an upright mast. A torque converter and transmission are connected between a prime mover (I.C. engine or electric motor) on the rig and the drill holder. The torque converter includes a servo controlled modulatable torque converter input (slipping) clutch for driving the drill holder at desired rotational speeds. The transmission includes a pair of solenoid actuated directional clutches selectively energized for driving the drill holder in either forward or reverse directions (threading).
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: January 10, 1978
    Assignee: Twin Disc, Incorporated
    Inventors: Raymond C. Schneider, Clairdel C. Cox