Patents Assigned to Kubota Ltd.
  • Patent number: 5365802
    Abstract: An operation device for an accelerator composed of an output pulley, having an engaging latch and two engaging projections, for winding an output cable; a first pulley having a "C" shaped first engaging hole, for winding a first cable; a second pulley having a "C" shaped second engaging hole, for winding a second cable; and an accelerator lever having an engaging piece. The first engaging projection is moved within the first engaging hole and the second engaging projection is moved within the second engaging hole. The engaging projection is engaging with the engaging piece when the output pulley is rotated.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: November 22, 1994
    Assignees: Nippon Cable System Inc., Kubota Ltd.
    Inventors: Kazuhiro Suzuki, Eriya Harada, Akira Minoura
  • Patent number: 5238508
    Abstract: Ferritic-austenitic duplex stainless steel comprising the following components in the following proportions in % by weight:0<C.ltoreq.0.08,______________________________________ Si 0.2-2.0, Mn 0.2-2.0, Cr 19.0-30.0, Ni 3.0-9.0, Mo 1.0-5.0, Cu 0.5-3.0, Co 0.2-4.0, N 0.05-0.35, ______________________________________the balance being substantially Fe and inevitable impurities, the proportions of Cr and Ni having the correlation of19.0.ltoreq.Cr<24.0 and 3.0.ltoreq.Ni.ltoreq.8.0, or 24.0.ltoreq.Cr.ltoreq.30.0 and 4.0.ltoreq.Ni.ltoreq.9.0the micro structure of the steel containing delta-ferrite phase in an amount of 30 to 70% in area ratio.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: August 24, 1993
    Assignee: Kubota, Ltd.
    Inventors: Akira Yoshitake, Akio Kuhara, Toshiaki Ishii
  • Patent number: 5216935
    Abstract: A bidirectional control arrangement for a vehicle comprising a seesaw type pedal including a forward drive depress pad and a backward drive depress pad for controlling a hydrostatic stepless transmission. A down-toe motion of an operator's foot applied to the forward drive depress pad controls the transmission for accelerating the vehicle forward, while a down-toe motion thereof applied to the backward drive depress pad controls the transmission to accelerate the vehicle backward. The forward and backward drive depress pads are spaced apart longitudinally of the vehicle and offset from each other transversely of the vehicle.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: June 8, 1993
    Assignee: Kubota Ltd.
    Inventors: Teruo Shimamura, Kazuo Samejima, Yoshikazu Togoshi, Yoshihiro Kawahara
  • Patent number: 5149308
    Abstract: A transmission comprising a change speed mechanism and a differential housed in a transmission case. The change speed mechanism includes drive gears mounted on a transmission shaft, and driven gears meshed with drive gears. The differential includes a differential case having elongated axle-bearing bosses extending to inside walls of the transmission case. The driven gears are mounted on one of the elongated bosses to be rotatable therewith. The differential case is supported by rear wheel axles extending through the transmission case and the elongated bosses.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: September 22, 1992
    Assignee: Kubota, Ltd.
    Inventors: Norimi Nakamura, Tadao Adachi, Akio Matsui, Kouji Fujiwara, Mitsugu Kobayashi, Tetsuo Yamaguchi, Minoru Fukuda
  • Patent number: 5136846
    Abstract: A hydraulic circuit, for use with i.e. a backhoe implement of a work vehicle. The circuit includes an engine, first through third pumps driven by the engine and a plurality of actuators. The invention is characterized by a relief pressure switchover device for selectively providing a first mode for realizing a low relief pressure in the first and second feed oil passages and a second mode for realizing a high relief pressure in the same and a relief pressure control device for causing the relief pressure switchover device to automatically provide the first mode when the third pump is loaded and causing the switchover device to automatically provide the second mode when the third pump is unloaded.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: August 11, 1992
    Assignee: Kubota, Ltd.
    Inventors: Kazuyoshi Arii, Masaru Kumatani
  • Patent number: 5128613
    Abstract: A probe comprises a magnet and a Hall element which are provided in a magnetically impermeable case. The Hall element is disposed at the midportion between the two poles of the magnet in parallel with the lines of magnetic force. The presence of a carburized portion in the member to be inspected and the depth of carburization are detected by passing d.c. current across the Hall element and detecting the Hall effect electromotive force produced between the two ends of the element which are opposed in a direction perpendicular to the direction of flow of the current.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: July 7, 1992
    Assignee: Kubota Ltd.
    Inventor: Makoto Takahashi
  • Patent number: 5114083
    Abstract: The present invention relates to a method and apparatus for pulverizing a material to produce a fine powdery material such as silica powder as a material for a filler for sealing semiconductors. It has a shell and a screw shaft mounted in the shell. A disk having an inverted conical bottom surface is coaxially secured to the bottom of the screw shaft. The disk serves to protect the blade of the screw shaft from wear. Also owing to the inverted conical bottom surface, a centripetal force acts on the screw shaft while in rotation, thus preventing it from running out of true. By providing a plurality of screw shafts in the shell, the fluid in the shell flows in a complicated manner, thus increasing the pulverizing efficiency. A partitioning plate formed with a hole in the upper or lower part thereof may be provided between the adjacent screw shafts to minimize the possibility of shortcircuiting of the material from the inlet of the shell to its outlet.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: May 19, 1992
    Assignee: Kubota, Ltd.
    Inventors: Iwao Ikebuchi, Yoshitaka Ihara, Hisashi Takei, Syozo Yamada, Mamoru Nakano, Akira Ganse
  • Patent number: 5108253
    Abstract: A hydraulic piping structure for controlling a boom assembly supported through a swing bracket by a swivel deck of a backhoe. The piping structure includes a plurality of hydraulic hoses for supplying oil from a pressure source mounted on the swivel deck to hydrauylic cylinders for controlling a boom and other components of the boom assembly. These hoses are arranged parallel on an upper face of the boom, with hoses connected to a boom cylinder being curved on a vertical plane. The parallel boses extend to the swivel deck through an interior space of the swing bracket and are fixed in position by a clamp mechanism therein. On the swivel deck, these hoses are separated into two batches and fixed in position by further clamp mechanisms, respectively.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: April 28, 1992
    Assignee: Kubota, Ltd.
    Inventors: Masahiko Kobayashi, Takafumi Wada, Siro Sugiyama
  • Patent number: 5097628
    Abstract: A valve operating structure for a working vehicle having different control valves with slide spools extending parallel to each other. A control lever is operatively connected to an interlocking member for selectively operating the control valves. The valve operating structure comprises an interlock switching mechanism for moving the interlocking member between a position to engage one slide spool and a position to engage another slide spool. The interlocking member is pivotable about a point located at substantially the same distance to the two spools, with a free end thereof extending to a position between the spools. The two interlocking positions are selectively provided by connecting the free end to one of the spools.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: March 24, 1992
    Assignee: Kubota, Ltd.
    Inventor: Masahiko Kobayashi
  • Patent number: 5088968
    Abstract: A power transmission for driving a vehicle wherein a high-low speed changer is disposed between an engine and a primary speed change mechanism. The speed changer comprises a planetary gear mechanism provided between an input shaft and an output shaft, a speed increasing clutch for causing the gear mechanism to effect a speed increase, and a direct coupling clutch for coupling the input shaft to the output shaft via the gear mechanism without speed change. Since the torque transmitted to the speed change mechanism is small, the transmission can be compact in its entirety.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: February 18, 1992
    Assignee: Kubota Ltd.
    Inventors: Yasuyuki Horii, Seiichi Takahashi, Takeshi Imamura
  • Patent number: 5088020
    Abstract: Disclosed is a pivotal movement control device for a boom-equipped working machine provided with a pivotal movement control responsive to the inclined angle of a control lever and a position detector for detecting the moved position of a boom in a lateral direction. The device includes a changeover switch for changing between an automatic mode and a manual mode, an automatic target position stop control for storing a signal from the position detector as a target stop position when the changeover switch is changed from the manual mode to the automatic mode and pivotally moving the boom to the target stop position and stopping it there while reading a positional signal from the position, when the boom is at a position other than the target stop position and the control lever is operated to the side of the target stop position.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: February 11, 1992
    Assignee: Kubota Ltd.
    Inventors: Tetsuya Nishida, Yoshiyuki Katayama
  • Patent number: 5082750
    Abstract: A magnetic recording medium having excellent noise characteristics and comprising a metal magnetic film formed on a nonmagnetic substrate and made of (1) a Co-Cr-Nb alloy, or (2) a Co-Cr-Ni-Nb alloy. The alloys (1) and (2) are represented respectively by the following formulae:Co.sub.1-x-z Cr.sub.x Nb.sub.z (1)Co.sub.1-x-y-z Cr.sub.x Ni.sub.y Nb.sub.z (2)wherein x, y and z each represent an atomic ratio, x is 0.08 to 0.15, y is 0.05 to 0.25 and z is 0.03 to 0.10.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: January 21, 1992
    Assignee: Kubota Ltd.
    Inventors: Toshiaki Morichika, Toshio Tani, Chiaki Sakai, Hideo Koshimoto, Tatsuhiko Kadowaki
  • Patent number: 5080489
    Abstract: A phase-modulated fiber optic gyroscope comprises a signal generating a signal generating section, a photoelectric converter section and a signal processing section. The signal generating section includes a light source, an optical path for propagating light from the light source clockwise and counterclockwise, and a phase modulator for modulating the light propagating through the optical path. The photoelectric converter section converts an optical signal received from the signal generating section into an electric signal. The signal processing section derives a direction of rotation and a velocity of rotation from the electric signal received from the photoelectric converter section. The signal processing section includes an analog-to-digital converter for converting the electric signal received from the photoelectric converter section into a digital signal, and a digital signal processor for carrying out angle calculations based on the digital signal received from the analog-to-digital converter.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: January 14, 1992
    Assignee: Kubota, Ltd.
    Inventors: Kozo Nishikawa, Shuji Sonoda, Hirohisa Nakata
  • Patent number: 5079706
    Abstract: A steering control system for a self-propelled working vehicle having steerable front and rear wheels. The control system comprises sensors for detecting a directional or orientation error and a sideways error of the vehicle relative to a reference line or lines extending in a vehicle running direction, and a control unit for steering the vehicle in response to signals received from the sensors. The control unit is capable of steering the vehicle in a turn steering mode for turning the front and rear wheels to the same steering angle in opposite directions and a parallel steering mode for turning the front and rear wheels to the same steering angle in the same direction. When the directional error and the sideways error take place simultaneously, the control unit determines directions and angles for turning the front and rear wheels to correct the two errors simultaneously.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: January 7, 1992
    Assignee: Kubota Ltd.
    Inventors: Tetsuo Yamaguchi, Katsumi Ito, Shigeru Tanaka, Kazuhiro Takahara
  • Patent number: 5074254
    Abstract: In a forced-circulation type water-cooling system for a horizontal internal-combustion engine, a radiator is located roughly at the same height as an engine body in a surrounding space outside a cylinder head and is positioned at a lateral side of the engine body of the horizontal internal-combustion engine. A cooling water inlet for a water jacket and a pump mounting seat for a water pump are provided at one of the front and back opposite sides of the cylinder head, at the same side as where an engine a rotation shaft such as crankshaft of the engine or a gear casing thereof projects from one of the front and back opposite sides of the engine body. The water pump is mounted on the pump mounting seat with its pump shaft extending in the fore and back direction. A pump driving wheel is fixedly secured to the engine rotation shaft, and a pump input wheel is fixedly secured to the pump shaft. The pump driving wheel and the pump input wheel are interlockingly connected to each other through a wrapping connector.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: December 24, 1991
    Assignee: Kubota Ltd.
    Inventor: Yoshimichi Takamatsu
  • Patent number: 5062258
    Abstract: A two-axle four-wheel power vehicle is equipped between the front and rear wheels with a mower which comprises a plurality of cutters each rotatable about a vertical axis. The cutters are power-driven, and the clippings of grass thereby cut are discharged from an opening provided at one side of the vehicle body. The discharge opening is provided with an impeller power-driven about a lateral axis for transferring the discharged grass clippings through a duct to a collection box attached to the vehicle.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: November 5, 1991
    Assignee: Kubota LTD
    Inventors: Kazuo Samejima, Hiroaki Kawakita
  • Patent number: D321517
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: November 12, 1991
    Assignee: Kubota, Ltd.
    Inventors: Hisato Katoh, Hiroyuki Miki
  • Patent number: D329435
    Type: Grant
    Filed: May 3, 1989
    Date of Patent: September 15, 1992
    Assignee: Kubota Ltd.
    Inventors: Hisato Katoh, Kenichi Sato, Seiichi Takahashi
  • Patent number: D335862
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: May 25, 1993
    Assignee: Kubota, Ltd.
    Inventors: Tadashi Kusunoki, Akira Ishii
  • Patent number: D358157
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: May 9, 1995
    Assignee: Kubota Ltd.
    Inventors: Tadashi Kusunoki, Kouji Masutani