Excavating – Snow or ice removing or grooming by portable device – Railway clearer
Patent
1981-10-26
1984-01-03
Pekar, John A.
Excavating
Snow or ice removing or grooming by portable device
Railway clearer
180 8C, B62D 5702
Patent
active
044235607
ABSTRACT:
An improved walking mechanism for supporting and moving heavy equipment such as a strip mining drag line. The mechanism has a frame with a base pad attached to the frame for supporting the equipment on the ground. To move the equipment, a pair of conventional side pads are actuated with a crank arrangement to engage the ground and lift the base pad and frame off of the ground for stepping movement of the equipment horizontally with respect to the ground. The improvement comprises a cross pad positioned adjacent the forward or loaded end of the frame which is simultaneously actuated to engage the ground and provide partial support for the weight of the equipment when the side pads are actuated. The cross pad is pivotally connected to a force actuator, which in turn is pivotally connected to the frame. The force actuator is operated to extend and retract the cross pad horizontally and vertically between the frame and the ground.
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Helm Emanuel
Rivinius Theodore
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