Hitachi Contruction Machinery Co., Ltd. Patent applications |
Patent application number | Title | Published |
20140111648 | Device For Monitoring Area Around Working Machine - An around view monitor system for monitoring surroundings of the working machine includes a plurality of cameras arranged on the upper swiveling unit, each two of which are arranged such that view field ranges thereof partially overlap with each other; an image transformation device to convert camera images of respective cameras to viewpoint transformation such that upper viewpoint images; an image composing device for addressing to respective display areas; and a display image pattern converting device for changing boundary positions between the display areas for the respective virtual viewpoint images. | 04-24-2014 |
20140090369 | Hydraulic Drive Device for Working Machine - A hydraulic drive device for a hydraulic excavator, includes: a first hydraulic pump; a first boom directional control valve and a second arm directional control valve which are connected in parallel to the first pump; a second hydraulic pump; and a second boom directional control valve and a first arm directional control valve which are connected in parallel to the second pump; wherein: the hydraulic drive device also includes: a third hydraulic pump; a third boom directional control valve connected to the third pump and controlling the flow of pressure oil supplied to a boom cylinder; and a third arm directional control valve connected in tandem with the third boom directional control valve and controlling the flow of pressure oil supplied to an arm cylinder. | 04-03-2014 |
20130071214 | Hybrid Wheel Loader - A hybrid wheel loader includes: an engine that includes an output shaft; a motor/generator that includes a rotating shaft directly attached to the output shaft of the engine; a transmission that includes an input shaft attached to the rotating shaft of the motor/generator, and an output shaft; a propeller shaft disposed on an output side of the transmission and driven via the output shaft of the transmission; an electricity storage device; and a control device that stores electricity into the electricity storage device by collecting electrical energy at the motor/generator. | 03-21-2013 |