Patents Assigned to HITACHI CONTRUCTION MACHINERY CO., LTD.
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Publication number: 20140111648Abstract: 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.Type: ApplicationFiled: June 2, 2011Publication date: April 24, 2014Applicant: Hitachi Contruction Machinery Co., Ltd.Inventor: Hidefumi Ishimoto
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Publication number: 20140090369Abstract: 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.Type: ApplicationFiled: May 17, 2012Publication date: April 3, 2014Applicant: Hitachi Contruction Machinery Co., Ltd.Inventors: Tsuyoshi Nakamura, Kazunori Nakamura, Yasuo Okano, Kouji Ishikawa, Kensuke Sato, Hiroyuki Azuma, Mitsuhiko Kanehama, Yusuke Kajita
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Publication number: 20130071214Abstract: 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.Type: ApplicationFiled: May 27, 2011Publication date: March 21, 2013Applicant: Hitachi Contruction Machinery Co., Ltd.Inventors: Noritaka Itou, Satoru Kaneko
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Publication number: 20070242910Abstract: Grease for a slide bearing, which can suppress unusual noise attributable to a slip caused between a shaft and a bearing when a machine is stopped. In slide bearing grease 24 supplied to between a slide bearing 16 formed of a porous sintered alloy-made bushing having pores 30 impregnated with lubricating oil 31 and a shaft 22 inserted in the slide bearing 16 and supported to be slidingly rotatable in the circumferential direction, the slide bearing grease 24 employs base oil having dynamic viscosity of 10-70 mm2/s at 40° C. and exuding under a load of the shaft 22 to form an oil film 35 between the slide bearing 16 and the shaft 22.Type: ApplicationFiled: October 25, 2005Publication date: October 18, 2007Applicant: HITACHI CONTRUCTION MACHINERY CO., LTD.Inventors: Hideki Akita, Osamu Gokita, Minoru Fujisaki, Hajime Maezawa, Nobuo Yanaka, Hiroshi Nishimura, Hideyuki Fujiya
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Publication number: 20060096799Abstract: A prime mover control device of a construction machine according to the present invention includes a hydraulic pump (11) driven by a prime mover (40), a hydraulic traveling motor (5) driven with pressure oil output from the hydraulic pump (11), and a control valve (12) that controls a flow of the pressure oil from the hydraulic pump (11) to the hydraulic motor (5) in response to an operation of an operating member (22a).Type: ApplicationFiled: September 26, 2002Publication date: May 11, 2006Applicant: HITACHI CONTRUCTION MACHINERY CO., LTD.Inventors: Yukihiro Tatsuno, Hidetoshi Satake, Kazuhiro Ichimura
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Patent number: D875143Type: GrantFiled: April 19, 2017Date of Patent: February 11, 2020Assignee: Hitachi Contruction Machinery Co., Ltd.Inventors: Shigehisa Hagura, Atsushi Ninomiya, Masao Kariya, Hayato Kubota, Hiroki Sugawara