Back to results
US 6,655,229 B2Granted
Operation lever device
AssigneeKomatsu Ltd.
InventorsYuuichi Yamamoto, Yasuhiro Satou, Shuuji Hori, Naoki Ishizaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeKomatsu Ltd.
InventorsYuuichi Yamamoto, Yasuhiro Satou, Shuuji Hori, Naoki Ishizaki
Estimating the term…
It is designed that an oil pressure signal can be output by operating an operation lever in a twisting direction; a structure can be made simple and its assembly and adjustment are easy; an operation force can be reduced; and a layout is not restricted. It is also designed that when the operation lever is left free after it is twisted, it returns smoothly to the original neutral position. When the operation lever is twisted about the lever axis, the shaft supported by bearings is twisted. The twist of the shaft is converted into the movement in a direction to move the pistons by first and second levers, and the pistons are moved. When the pistons are moved, the oil pressure signal is output from the discharge ports. A disk plate is separated into a first disk plate to which the root of the operation lever is attached and a second disk plate which is tiltably supported by a tilting fulcrum. And, the first disk plate is independent of the second disk plate and twisted about the lever axis of the operation lever.
An operation lever device which moves pistons (1, 2, 3, 4) according to a tilted direction and a tilted amount of an operation lever (8), outputs an oil pressure signal according to the movement of the pistons (1, 2, 3, 4) and operates operation objects corresponding to first and second shafts (31, 32) according to the oil pressure signal, comprising:
An operation lever device which is provided with a tilting fulcrum (11) for supporting the root of an operation lever (8) and tilting the operation lever (8), moves pistons (1, 2) according to the tilting operation of the operation lever (8), outputs an oil pressure signal according to the movement of the pistons (1, 2), and operates an operation object (31) according to the oil pressure signal, comprising:
An operation lever device which is provided with a disk plate to which the root of an operation lever is attached and a tilting fulcrum which tiltably supports the disk plate, moves pistons via the disk plate according to the tilting operation of the operation lever, and outputs a signal according to the movements of the pistons to operate an operation object according to the signal, wherein:
An operation lever device which is provided with a disk plate to which the root of an operation lever is attached and a tilting fulcrum which tiltably supports the disk plate, moves pistons via the disk plate according to the tilting operation of the operation lever, and outputs a signal according to the movements of the pistons to operate an operation object according to the signal, wherein:
Dependencies are inferred from the claim text.