Patents by Inventor Genroku Sugiyama

Genroku Sugiyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8051649
    Abstract: A hydraulically driven industrial machine having a variable displacement type hydraulic pump adapted to take in and pressurized working oil from an working oil tank, a hydraulic actuator to be driven by pressurized working oil delivered from the hydraulic pump through a control valve to perform a predetermined job, a variable return oil cooling means capable of cooling return oil from the hydraulic actuator at a varying cooling rate, an operational load detection means adapted to detect an operational load factor of the hydraulic actuator, and a control means adapted to vary the return oil cooling rate on the basis of an operational load factor detected by the operational load detection means.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: November 8, 2011
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Mitsuhiro Yoshimoto, Genroku Sugiyama
  • Patent number: 7657841
    Abstract: A display device for a construction machine has a display switching means, output control means, operation detecting means, and display prohibiting means. The display switching means switches information displayed on a monitor placed in an operation cabin, where the switching is made to prevent display of unnecessary information on the monitor while the construction machine is performing work. The output control means selects display information recorded in information recording means and outputs the selected information to the monitor. The operation detecting means detects whether or not the construction machine is in a working state. When the operation detecting means detects that the construction machine is in the working state, display switching operation of the monitor is performed by the display switching means, and the display prohibiting means prohibits the display of specific information.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: February 2, 2010
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kazuhiro Shibamori, Keiichiro Nakamura, Tsuyoshi Sakyo, Kazunori Nakamura, Tadatoshi Shimamura, Genroku Sugiyama
  • Patent number: 7643938
    Abstract: A hydraulic excavator periodically measures its current location at predetermined time intervals by the GPS device in an inoperative state where its engine key is in the off position and sends the current location data and time data to a management server by a main controller and communicator. The management server receives the periodically sent location data at its communicator and successively stores it in its memory. The current location data and the measurement time data to provide a location confirmation service by a location information provider. Changes in location can be confirmed on a map, the movement of the hydraulic excavator can be tracked, and assistance can be given for confirmation of location and prevention of theft.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: January 5, 2010
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroyuki Adachi, Genroku Sugiyama, Kazuhiro Shibamori, Hideki Komatsu, Koichi Shibata, Hiroshi Watanabe
  • Publication number: 20090217656
    Abstract: A hydraulically driven industrial machine has a variable displacement hydraulic pump for pressurizing hydraulic oil from a hydraulic oil tank; a actuator driven and controlled by oil that is discharged from the hydraulic pump and is supplied through a controlled valve and performing predetermined work; cooling means with a variable cooling rate function, the cooling means cooling return oil from the actuator and varying the rate of cooling of the return oil; load detection means for detecting work load by the actuator; and control means for varying the rate of cooling of the return oil according to the work load detected by the load detection means.
    Type: Application
    Filed: February 6, 2007
    Publication date: September 3, 2009
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Mitsuhiro Yoshimoto, Genroku Sugiyama
  • Publication number: 20090090103
    Abstract: A hydraulic drive system is provided with a front casing 50 and a rear ceasing 51. The front casing 50 is formed of a single member, and accommodates therein rotary members, which include a cylinder block 30A and the like, and a part of an output shaft 36 of a hydraulic motor 30 and rotary members, which include a cylinder block 31A and the like, and a part of an output shaft 32 of a hydraulic motor 31. The rear casing 51 is joined to the front casing 50, and has a ports plate 30C and a ports plate 31C arranged therein. The rear casing 51 has an oilway 52 communicating to a first port 30C1 of the ports plate 30C, an oilway 53 communicating to the oilway 52 and also communicating to a first port 31C1 of the ports plate 31C, an oilway 54 communicating to a second port 30C2 of the ports plate 30C, and an oilway 55 communicating to the oilway 54 and also communicating to a second port 31C2 of the ports plate 31C.
    Type: Application
    Filed: May 25, 2006
    Publication date: April 9, 2009
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Yoshitomo Yabuuchi, Genroku Sugiyama, Takeshi Kobayashi, Takashi Niidome, Takeshi Kurihara
  • Patent number: 7512471
    Abstract: The invention provides a control system for a working vehicle, which can realize higher work performance and better fuel economy in a compatible way. A controller 10 includes table 10a, 10b and tables 10e, 10f for deciding maximum pump absorption torques and engine output torques based on an engine revolution speed, and selectors 10c, 10g for switching over the decided maximum pump absorption torques and engine output torques depending on a work performance mode or a fuel economy mode is selected. A pump absorption torque characteristic for the fuel economy mode is set so as to provide a relative small maximum pump absorption torques TB in a high revolution range, and an engine output characteristic for the fuel economy mode is set so as to provide a relatively small engine output torque in the high revolution range.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: March 31, 2009
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kazunori Nakamura, Tsuyoshi Nakamura, Kentaro Itoga, Genroku Sugiyama
  • Patent number: 7493978
    Abstract: A traveling hydraulic working machine has a target revolution speed of an engine commanded by an input and sensors for detecting an operating situation of a hydraulic actuator and an operating situation of a traveling system. A prime-mover revolution speed control modifies the target revolution speed of the prime mover when the operating situation of the hydraulic actuator and the operating situation of the traveling system come into respective particular states, and controls the revolution speed of the prime mover, With the traveling hydraulic working machine, in the combined operation of traveling and working a hydraulic actuator, work can be performed on the basis of the engine revolution speed intended by an operator. When a working load varies, the engine revolution speed is automatically controlled.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: February 24, 2009
    Assignee: Hitachi Construction Machinery Co., Ltd
    Inventors: Tsuyoshi Nakamura, Genroku Sugiyama, Kazunori Nakamura, Toichi Hirata
  • Patent number: 7493112
    Abstract: Assessment information needed to calculate a used vehicle assessment value of a hydraulic excavator 10 is input to a portable telephone 20 and is then transmitted from the portable telephone 20. The transmitted assessment information is received at a manufacturer's base station 40 at a remote location. The used vehicle assessment value of the hydraulic excavator 10 is calculated based upon the received assessment information, and history information and operation information on the hydraulic excavator 10 read out from an operation information database 43 and a history database 42 in correspondence to an ID number assigned to the hydraulic excavator which is included in the assessment information.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: February 17, 2009
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroyuki Adachi, Toichi Hirata, Genroku Sugiyama, Hiroshi Onoue, Hideo Karasawa, Koichi Shibata, Hiroshi Watanabe, Kiyoshi Ono, Osamu Tomikawa
  • Patent number: 7489049
    Abstract: An antitheft system can be provided by constructing such that, when a stop signal has been inputted from an engine 7, a main controller 2 outputs, until a first predetermined time Ts elapses, a turn-on signal to switches 8, 9 to perform a similar antitheft processing as in an operation of the engine 7 and after an elapse of the first predetermined time Ts, instructs the switch 9 to repeat a turn-on and turn-off at predetermined time intervals ?t, and, whenever the switch 9 is brought into a turned-on position, detects a position at that time by a position detecting controller 3 and compares the position with a position at the time of an engine stop to determine whether or not a theft has taken place. Owing to this construction, it is no longer necessary to always feed power to the position detecting controller 3 during the stop of the engine 7, thereby making it possible to cut down the feeding of as much power to the controller 3 as a time elapsed during which the switch 9 is kept off.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: February 10, 2009
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hideki Komatsu, Genroku Sugiyama, Hiroyuki Adachi, Kazuhiro Shibamori, Koichi Shibata
  • Patent number: 7434394
    Abstract: To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: October 14, 2008
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kouji Ishikawa, Yusuke Kajita, Kazunori Nakamura, Genroku Sugiyama, Hideo Karasawa
  • Patent number: 7370475
    Abstract: A modification torque ?T and a torque converter speed ratio e is computed from input and output revolution speeds of a torque converter 31. A first determination coefficient ? corresponding to the speed ratio e, and a second determination coefficient ? corresponding to a pump pressure are computed. A selector 87 selects the smaller one of these coefficients as a determination coefficient ?, and the modification torque ?T is multiplied by ? to provide a modification torque ?TA. An adder 89 adds the modification torque ?TA (negative value) to a pump base torque TR to provide a modified pump base torque TRA, whereby a maximum pump absorption torque TRA is controlled so as to become TRA. The maximum pump torque reducing control can then be performed while accurately confirming a work situation during the combined operation of travel and a working actuator.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: May 13, 2008
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tsuyoshi Nakamura, Kazunori Nakamura, Toichi Hirata, Genroku Sugiyama, Kentaro Itoga
  • Patent number: 7287188
    Abstract: A maintenance system of a hydraulic excavator (11) is provided with a maintenance monitoring device (21), a maintenance management server (12) for managing trouble information and operating information for each working machine, a model information server (13), and a service personnel mobile terminal (14) connected to one another through the Internet (15). When trouble occurs in the hydraulic excavator, the maintenance system (21) transmits trouble information to the maintenance management server (12), and the maintenance management server (12) transmits information on occurrence of trouble to the mobile terminal (14) and displays it on a display unit. This system manages the maintenance manuals and other data for each model in a model information database separate from the maintenance database and correlates the two databases based on the model data.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: October 23, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koichi Shibata, Hiroshi Watanabe, Genroku Sugiyama, Hiroyuki Adachi
  • Patent number: 7272928
    Abstract: To keep one of three hydraulic pumps unaffected by variations in torque of the remaining hydraulic pumps when the three hydraulic pumps are used, displacements of the first and second hydraulic pumps are controlled based on their own delivery pressures P1,P2 and a pressure P3? obtained by reducing through a reducing valve 14 a delivery pressure P3 from the third hydraulic pump, while a displacement of the third hydraulic pump 3 is controlled only by its own delivery pressure P3. The pressure oil delivered from the third hydraulic pump 3, therefore, remains unaffected by variations in delivery flow rates from the first and second hydraulic pumps 1,2, in other words, by variations in their torque consumptions, so that the third hydraulic pump is assured to provide a stable flow rate.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: September 25, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Nobuei Ariga, Genroku Sugiyama, Hideaki Tanaka, Tsukasa Toyooka, Masaki Egashira, Takatoshi Ooki
  • Publication number: 20070202861
    Abstract: Assessment information needed to calculate a used vehicle assessment value of a hydraulic excavator 10 is input to a portable telephone 20 and is then transmitted from the portable telephone 20. The transmitted assessment information is received at a manufacturer's base station 40 at a remote location. The used vehicle assessment value of the hydraulic excavator 10 is calculated based upon the received assessment information, and history information and operation information on the hydraulic excavator 10 read out from an operation information database 43 and a history database 42 in correspondence to an ID number assigned to the hydraulic excavator which is included in the assessment information.
    Type: Application
    Filed: April 27, 2007
    Publication date: August 30, 2007
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroyuki Adachi, Toichi Hirata, Genroku Sugiyama, Hiroshi Onoue, Hideo Karasawa, Koichi Shibata, Hiroshi Watanabe, Kiyoshi Ono, Osamu Tomikawa
  • Publication number: 20070168101
    Abstract: A display device for a construction machine has a display switching means, output control means, operation detecting means, and display prohibiting means. The display switching means switches information displayed on a monitor placed in an operation cabin, where the switching is made to prevent display of unnecessary information on the monitor while the construction machine is performing work. The output control means selects display information recorded in information recording means and outputs the selected information to the monitor. The operation detecting means detects whether or not the construction machine is in a working state. When the operation detecting means detects that the construction machine is in the working state, display switching operation of the monitor is performed by the display switching means, and the display prohibiting means prohibits the display of specific information.
    Type: Application
    Filed: April 15, 2005
    Publication date: July 19, 2007
    Inventors: Kazuhiro Shibamori, Keiichiro Nakamura, Tsuyoshi Sakyo, Kazunori Nakamura, Tadatoshi Shimamura, Genroku Sugiyama
  • Patent number: 7228125
    Abstract: Assessment information needed to calculate a used vehicle assessment value of a hydraulic excavator 10 is input to a portable telephone 20 and is then transmitted from the portable telephone 20. The transmitted assessment information is received at a manufacturer's base station 40 at a remote location. The used vehicle assessment value of the hydraulic excavator 10 is calculated based upon the received assessment information, and history information and operation information on the hydraulic excavator 10 read out from an operation information database 43 and a history database 42 in correspondence to an ID number assigned to the hydraulic excavator which is included in the assessment information.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: June 5, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroyuki Adachi, Toichi Hirata, Genroku Sugiyama, Hiroshi Onoue, Hideo Karasawa, Koichi Shibata, Hiroshi Watanabe, Kiyoshi Ono, Osamu Tomikawa
  • Patent number: 7222051
    Abstract: A working machine maintenance system having a plurality of working machines. A center server is provided that manages maintenance on the plurality of working machines by engaging in data exchange through bidirectional communication with each of the plurality of working machines via a communication line. The working machines each include an operation data storage device, an operation device operated to enter a maintenance work completion, a data transmission device, a data reception device, and a display device at which the maintenance information is displayed. The center server includes a data reception device that receives the operation data, the maintenance work completion data, and the maintenance data that have been transmitted, an operation database in which the operation data are stored, a maintenance database, a calculation device that calculates maintenance timing. and a data transmission device that transmits data related to the maintenance information.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: May 22, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Koichi Shibata, Hiroshi Watanabe, Hiroshi Ogura, Genroku Sugiyama, Hiroyuki Adachi, Hideo Karasawa
  • Publication number: 20070028607
    Abstract: To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6.
    Type: Application
    Filed: April 16, 2004
    Publication date: February 8, 2007
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kouji Ishikawa, Yusuke Kajita, Kazunori Nakamura, Genroku Sugiyama, Hideo Karasawa
  • Patent number: 7171188
    Abstract: Provided is a communication system for working machines, which makes it possible to transmit desired messages from sites, where the working machines are arranged, to their corresponding work administration centers at timings as needed. When a mail switch 10 arranged on a working machine 7 is operated to send information to a server 1, a terminal user-company identification unit 14 identifies, on the basis of a terminal information database 18, a user to which the information so received is to be sent. A user-company-dependent mail selection unit 15 selects customer information 19a on the user from a customer database 19. At a transmission mail creation unit 16, a corresponding new message 16a is created. The mail is then transmitted from a mail output unit 17. In this manner, a desired message can be sent from each working machine 7 at a remote location to the corresponding user at a timing as needed.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: January 30, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroshi Watanabe, Koichi Shibata, Genroku Sugiyama, Toichi Hirata, Hiroyuki Adachi, Hideki Komatsu, Yasushi Ochiai
  • Patent number: 7162347
    Abstract: Construction machine management, permitting operation of a construction machine only under specified conditions and inhibiting its operation in case it is in a state incongruent with preset working conditions. Working conditions for each construction machine are set up by a working conditions setup means, including a geographically divided working area and a working time zone in which a construction machine is allowed to operate in a specified working area. Setup working conditions are stored in a memory means. At the time of starting a construction machine, the status of the construction machine is checked for by a status checkup means which is adapted to check for current position of the construction machine and current time against the working area and working time zone of the setup working conditions.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: January 9, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kazuhiro Shibamori, Genroku Sugiyama, Hiroyuki Adachi, Koichi Shibata, Hideki Komatsu