Patents Assigned to Kabushiki Kaisha Komatsu Seisakusho
  • Patent number: 5684694
    Abstract: A control system designed such that if a heavy load is imposed on a vehicle during running and a hydraulic relief state in which an oil pressure in a hydraulic circuit for a hydrostatic transmission unit exceeds a relief pressure is detected, the angle of a discharge controlling swash plate for a pump is reduced to a specified value (e.g., 50% of the maximum angle) or less, whereby the stall of the vehicle and the overheat of machine parts are prevented.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: November 4, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Tsutomu Ishino, Ryoichi Maruyama, Yuichi Nagahiro
  • Patent number: 5676518
    Abstract: An unstacking feeder capable of unstacking sheet materials efficiently from a sheet stack has a sheet stack transfer device (3) for transferring a sheet stack, which consists of a plurality of stacked sheet materials (1a), along a circulating transport configuration extending across a predetermined unstacking position (A). In order to separate individual sheet materials from a sheet stack in order, a floater (6) is selected and supplied automatically in accordance with the configuration of the sheet materials by a floater supply mechanism (5, 7, 7d). Each unstacked sheet material is transferred to equipment in the subsequent stage, such as a transfer feeder by sheet material transporting arrangements (11, 19). During this period, each sheet material (1a) separated by the floater (6) is transferred onto a sheet material transporting arrangement by a sheet material transfer device (9).
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: October 14, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Yasunori Okubo, Shigekazu Noda
  • Patent number: 5671137
    Abstract: A response control system for a hydrostatic-mechanical transmission. In this system, it is determined in digging/moving operation whether an actual speed ratio which is the ratio of the revolution speed of the output shaft to the revolution speed of the power source is equal to a specified value or less, and if so, a target speed ratio which is a target value for the ratio of the revolution speed of the output shaft to the revolution speed of the power source is set, limiting the amount of change in the target speed ratio per unit time. Based on the target speed ratio thus set, the angle of at least either of discharge controlling swash plates is controlled, thereby reducing vehicle acceleration at the primary stage of digging. In order to slow down the response to a change in load during digging operation, a constant indicating the response to a change in engine revolution is set small in proximity to a target engine revolution speed.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: September 23, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Tsutomu Ishino, Ryoichi Maruyama, Shingo Ota
  • Patent number: 5666808
    Abstract: An operating valve assembly incorporates a pressure compensation valve and is capable of contributing down-sizing of a hydraulic circuit. The valve assembly includes an operating valve, compensation valves and a load pressure detecting portion. A valve body of the operating valve defines a spool bore extending laterally through the valve body at a vertically intermediate portion of the valve body, a load pressure detecting port at a laterally intermediate portion of the spool bore, and a respective pump port, actuator port and tank port at each side of the load pressure detecting port. The operating valve also includes a spool within the spool bore. The pressure compensation valves are arranged at left and right sides of an upper portion of the valve body and the load pressure detecting portion, for supplying load pressure to the load pressure detecting port, is formed in the spool.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: September 16, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Koji Yamashita, Teruo Akiyama, Kouji Saito, Shinichi Shinozaki
  • Patent number: 5661671
    Abstract: In bending angle detection, a linear projected light image formed on the surface of a workpiece is photographed by a photographing device; the actual inclination angle of a specimen is stored as data in correspondence with the inclination angle and position of the specimen in an image; and the bending angle of the workpiece is obtained by accessing the data, with the inclination angle and position of the linear projected light image in an image produced by photographing. In main straight line extraction, main pixels are obtained from the distribution of the brightness of pixels aligned on specified axes and a main straight line is obtained from a plurality of main pixels. For extracting only a necessary straight line from an image including unnecessary straight lines, the photographing device is so disposed as to photograph a lower bender and a second straight line from the bottom end of the image is extracted.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: August 26, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Toshiyuki Ooenoki, Toshiro Otani, Shigeru Tokai
  • Patent number: 5659420
    Abstract: A confocal optical apparatus comprising a light source, a first aperture portion for passing light emitted from the light source and obtaining a point source, an objective lens for causing the light that has passed through the first aperture portion to converge on a measurement object, a second aperture portion located on a plane conjugate with the convergence surface on the measurement object, and light detectors for detecting light that has passed through the second aperture portion, wherein placing the first and second aperture portions in the same position and using them as the same aperture portion, as well as positioning the detection surfaces of the light detectors substantially on the same surfaces as the conjointly used identical aperture portions make it possible to reduce the size and weight of the apparatus, to perform three-dimensional shape measurements rapidly and accurately, and to facilitate the alignment of each portion.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: August 19, 1997
    Assignee: Kabushiki Kaisha Komatsu SEisakusho
    Inventors: Hideyuki Wakai, Kiyokazu Mizoguchi, Toru Suzuki, Keiji Terada, Masato Moriya, Manabu Ando, Koji Shio
  • Patent number: 5652805
    Abstract: In bending angle detection, a linear projected light image formed on the surface of a workpiece is photographed by a photographing device; the actual inclination angle of a specimen is stored as data in correspondence with the inclination angle and position of the specimen in an image; and the bending angle of the workpiece is obtained by accessing the data, with the inclination angle and position of the linear projected light image in an image produced by photographing. In main straight line extraction, main pixels are obtained from the distribution of the brightness of pixels aligned on specified axes and a main straight line is obtained from a plurality of main pixels. For extracting only a necessary straight line from an image including unnecessary straight lines, the photographing device is so disposed as to photograph a lower bender and a second straight line from the bottom end of the image is extracted.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: July 29, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Toshiyuki Ooenoki, Toshiro Otani, Shigeru Tokai
  • Patent number: 5651390
    Abstract: A direction control valve is formed by providing a main spool for establishing and blocking communication between an inlet port, first and second actuator ports and first and second tank ports. A pressure compensation valve comprising a check valve portion and pressure reduction portion is provided for compensating the pressurized fluid with a load pressure and supplying it to the inlet port. A plurality of valve blocks are connected to each other with respective first and second tank ports and respective pump ports in fluid communication. A pump port of one of the valve blocks is connected to a main inlet port, and a tank port of one of the valve blocks is connected to a main tank port. Thus, a hydraulic circuit for distributing a pressurized fluid from a single hydraulic pump to a plurality of actuators is provided.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: July 29, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Kazuyoshi Ishihama, Kazunori Ikei, Kazuo Uehara
  • Patent number: 5649443
    Abstract: A transfer feeder which comprises: a pair of lifting beams (9) which are so disposed as being parallel to each other and extending in a workpiece conveying direction; a lifting mechanism (10) for driving the said pair of the lifting beams in upward and downward directions; a plurality of pairs of cross bar carriers (15) which are so arranged on the said pair of the lifting beams as to be spaced apart from, and connected with, one another and be displaceable in the said workpiece conveying direction; a cross bar (16) that is transversely bridged across a said pair of those cross bar carriers as afore-said which are juxtaposed with each other, and that has a workpiece attracting means (19) attached thereto; and a feed mechanism (22) for driving the said cross bar carriers in a feed direction, the said transfer feeder being characterized in that at least the said lifting mechanism is provided with its drive source that is constituted by a servo-motor (11).
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: July 22, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Kazuhiko Shiroza, Kiyokazu Baba, Kenji Nishida
  • Patent number: 5648002
    Abstract: A work transferring apparatus for a thermal cutting machine is used for processing a workpiece placed on a worktable moving freely along an X axis direction by means of a work head moving freely along a Y axis direction crossing the X axis direction. The apparatus includes a chain conveyor mounted at an upper portion of the worktable for transferring the workpiece in and out, a body having a plurality of roller conveyors for transferring the workpiece to the chain conveyor, and a separating mechanism mounted between the chain conveyor of the worktable and the roller conveyor of the body for separating the workpiece after it is processed into a product and scrap. The body is arranged in a vicinity of the worktable, and the workpiece is set freely on the roller conveyor of the body.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: July 15, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Kenji Omote
  • Patent number: 5647705
    Abstract: A crankshaft miller includes a pair of work heads for supporting both ends of a work, a cutter unit for processing the work and a work rest for supporting the work during processing. The cutter unit and the work rest are provided separately, but are coupled by a separable link mechanism for moving the work rest together with the cutter unit as necessary. A method of use of a crankshaft miller includes the steps of providing a pair of movable work heads for supporting both ends of the work, a cutter unit for processing the work and the work rest for supporting the work during processing. The cutter unit and the work rest are provided separately, but coupled by a separable link mechanism so that the work rest can be moved together with the cutter unit as necessary.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: July 15, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Masumi Shimomura
  • Patent number: 5642374
    Abstract: Aimed at preventing a laser light beam profile from fluctuating, and by using the fact that there is a substantially proportional relation between the beam profile and the charging voltage as well as between the beam profile and the composition or the total pressure of the laser gases, an excimer laser device comprises a laser chamber containing laser gases which are excited by initiating an electric discharge in the laser chamber to output laser light, a beam profile detector for detecting a beam profile of the output laser light, and a controller for controlling a electric discharge voltage (excitation intensity) and composition or total pressure of the prescribed types of laser gases in such a way that the beam profile is shaped as desired based on detection results of the beam profile detector.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: June 24, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Osamu Wakabayashi, Hakaru Mizoguchi
  • Patent number: 5634523
    Abstract: A blade device, wherein the angling angle of a blade can be increased and the blade width at the maximum angling is smaller than the chassis width without setting the mount position of the blade too far from a chassis. The connecting position of a joint for connecting a frame and a blade deviates from the crosswise center X--X of a chassis; and an actuator for pivotally moving the blade forward or backward is attached to the frame. As such, good workability of the blade device and good transportability of an earth-moving machine to which the blade device is operably coupled can be obtained.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: June 3, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Takeshi Kobayashi, Haruo Tomozaki
  • Patent number: 5632333
    Abstract: A temperature and humidity adjusting apparatus has an air cooling and dehumidifying device, an air heater and a humidifier arranged in order. The air cooling and dehumidifying device includes thermoelements that use the Peltier effect. The humidifier includes hollow yarn bodies, each of which are formed by winding metal wire that serves as a heater on the outer periphery of a hollow yarn that is formed into hollow construction from heat resistant fiber. The humidifier also includes means for supplying water to each of the hollow yarn bodies and a power supply that supplies power to the metal wire.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: May 27, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Toshihide Imamura, Kanichi Kadotani, Katsuyoshi Ito
  • Patent number: 5632306
    Abstract: An operating valve assembly with an electromagnetic proportioning pressure reduction valve comprises an operating valve constructed by slidably disposing a spool in a spool bore opening to an end face of a valve body, mounting a spring case including a case body having a blind bore and a housing having a spool bore for a pressure reduction valve on the end face in a manner such that the spool bore and the blind bore are matched to each other, and defining a pressure receiving chamber between the interior wall of the blind bore of the spring case and the end portion of the spool, and the electromagnetic proportioning pressure reduction valve constructed by disposing a spool for the pressure reduction valve in the spool bore for the pressure reduction valve, and mounting a solenoid for driving the spool for the pressure reduction valve on the housing, and an output port of the electromagnetic proportioning pressure reduction valve is communicated with the pressure receiving chamber.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 27, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Keisuke Taka
  • Patent number: 5630317
    Abstract: This invention aims to improve the operability in a hydraulic drive machine. According to a load Pp on work machine actuators 3 and 4, a differential pressure of a discharge pressure Pp of a hydraulic pump and a load pressure PLS is varied. Further, the differential pressure is varied so that the differential pressure between the discharge pressure Pp of the hydraulic pump 2 and the load pressure PLS decreases as the load Pp on the work machine actuators 3 and 4 increases and a rotational speed .epsilon.E of an engine decreases. Furthermore, the rotational speed .epsilon.E of the engine 1, discharge pressure Pp of the hydraulic pump 2, the operation amounts S1 and S2 of the various operation levers are detected, respectively, the absorbing torque of the hydraulic pump 2 is set based on the detected rotational speed .epsilon.E and a target rotational speed .epsilon.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: May 20, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Fujitoshi Takamura, Tetsuya Nakayama, Shuki Akushichi
  • Patent number: 5629773
    Abstract: A three-dimensional image measuring device which comprises a light source; a plane image forming unit for forming a plane image in a space in its depth direction on the basis of light emitted from the light source; a scanning unit for moving and scanning the plane image formed by the plane image forming unit in its depth direction; an object to be measured disposed in the space where the plane image is formed; a light receiving unit for measuring the strength of light scattered on a surface of the object as the plane image is moved and scanned and; a distance measuring unit for measuring the distance to the object on the basis of the output of the light receiving unit, whereby a three-dimensional image with least reduced invisible area is easily and accurately measured in a short time without using the principle of triangulation.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 13, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Hideyuki Wakai, Toru Suzuki, Keiji Terada, Masato Moriya, Manabu Ando
  • Patent number: 5629850
    Abstract: A device for automatically detecting vehicle slip. A theoretical turning velocity .omega.t is detected when wheels or crawlers of a vehicle 1 do not slip at all with respect to the road surface on which the vehicle travels based on outputs v and .phi. of a vehicle speed sensor 5 and a steering angle sensor 4. A current turning angular velocity .omega.r of the vehicle 1 is then computed based on the output of a heading angle sensor 6. The slip of the vehicle 1 is then detected based on a difference between these two turning angular velocities .omega.t and .omega.r. It is therefore possible to prevent course deviation and the like, and thus possible to dramatically improve vehicle safety.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: May 13, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Yukio Okawa
  • Patent number: 5627258
    Abstract: By the use of a binder comprising (a) 40 to 70 wt % of a water-soluble amide material and/or water-soluble amine material and (b) 25 to 60 wt % of a polyamide resin component substantially composed of a polyamide resin material having 10 carbon atoms or more on average between amido groups, a molded article is produced by metal powder injection molding.From such a molded article, the water-soluble amide material and/or water-soluble amine material is eluted by a water-based solvent and then, the polyamide resin component is removed by heating.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: May 6, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Takemori Takayama, Masato Miyake, Yoshitaka Ohyama, Katsuyoshi Saito, Hiroshi Ono
  • Patent number: 5624255
    Abstract: A multipurpose controlled atmosphere heat treatment system applicable to small-quantity production of multiple items as well as mass-production. A delivery path is provided so as to pass through a workstation and the heat treatment system and an automatic guided vehicle travels along this delivery path. The automatic guided vehicle shuts out external air, comprises a holding chamber in which an inert gas atmosphere can be created, and shifts workpieces from an elevator provided in a high-rise warehouse into treatment cells. Each treatment cell has a sealing door on the side confronting to the automatic guided vehicle and pipes and various devices on a back face, ceiling or front face thereof.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: April 29, 1997
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Hideo Hisada, Naoji Hamasaka, Hayao Takahashi, Junji Mizoguchi