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US 4,889,466 AGranted
Control device for a power shovel
AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorsHideo Jindai, Keiji Bando, Masakazu Yoshida, Hideki Yamada
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AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorsHideo Jindai, Keiji Bando, Masakazu Yoshida, Hideki Yamada
Estimating the term…
A control device for a power shovel having a first boom, a second boom and an arm rotatable around the longitudinal axis of the arm, detects the angle of the arm with respect to the horizontal plane based on the posture angles of the first and second booms and the arm, and controls the arm cylinder such that the angle of the arm with respect to the horizontal plane is held to a reference angle. Further, the control device detects a deviation angle between the current direction and the initial directions and controls the revolution angle of the arm so as to make the deviation angle zero. Furthermore, the control device designates a moving direction of the connection point between the second boom and the arm along a plane including the first boom, the second boom and the arm, and controls cylinders for the booms such that their connection point may be moved in the moving direction thus designated.
A control device for use in a power shovel having an upper revolving superstructure, a first boom having a base end pivotably connected to said upper revolving superstructure, and a fore end, a second boom having a base end pivotably connected to said fore end of the first boom, and a fore end and an arm comprising a base portion pivotably connected said fore end of the second boom, and a rotatable portion rotatable around the longitudinal axis thereof, comprising:
A control device for use in a power shovel having an upper revolving structure, a first boom having a base end pivotably connected to said upper revolving superstructure, and a fore end, a second boom having a base end pivotably connected to said fore end of the first boom, and a fore end, an arm comprising a base portion pivotably connected to said fore end of the second boom, and a rotatable portion rotatable around the longitudinal axis thereof and a bucket pivotably connected to said rotatable portion of the arm, comprising:
A control device for use in a power shovel having an upper revolving superstructure, a first boom having a base end pivotably connected to said upper revolving superstructure, and a fore end, a second boom having a base end pivotably connected to said fore end of the first boom, and a fore end, and an arm comprising a base portion pivotably connected to said fore end of the second boom, and a rotatable portion rotatable around an longitudinal axis thereof, comprising:
Dependencies are inferred from the claim text.