Armstrong, Nikaido, Marmelstein & Kubovcik
Control mechanism for hydraulic system
 A control mechanism for hydraulic system having three sets of hydraulic units and single control lever for controlling all said three sets of the units individually or in unison. The control mechanism comprises a stud having a ball fixedly secured to a vehicle frame, a socket mounted on the ball of said stud, a control lever fixedly secured to said socket, first and third ball couplings fixedly secured to said socket in such a manner that the centers of said first and third ball couplings are located on the first reference line passing through the center of the ball of said stud and at right angles to the axis of said control lever, a second ball coupling fixedly secured to said socket in such a manner that the center of said second ball coupling is located on a second reference line passing through the center of the ball of said stud and at right angles to the axis of said control lever and also said first reference line, a motion translation connecting mechanism connected to said third ball coupling, first and second hydraulic units each being connected to said first and second ball bearings, respectively, and a third hydraulic unit connected to said motion translation connecting mechanism. 
Kabushiki Kaisha Komatsu Seisakusho
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Kenichi Ikuo
Yoshida Mori