Patents Assigned to Kubota Ltd.
  • Apparatus for attaching front loader to vehicle
    Patent number: 4470751
    Abstract: An apparatus for attaching a front loader to a tractor or like vehicle comprises a pair of opposite lift arms removably connectable to the vehicle and pivotally movable upward and downward, a bucket supported by the front ends of the lift arms with pivots and pivotally movable upward and downward, bucket cylinders for pivotally moving the bucket, and a restraining member removably attached to the bucket for preventing the pivotal movement of the bucket relative to the ground. The lift arms as disconnected from the vehicle are moved by the bucket cylinders about the pivots to an attached position relative to the vehicle or to a removed position above the attached position and can be held in either position.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: September 11, 1984
    Assignee: Kubota, Ltd.
    Inventors: Motomu Masuzawa, Haruo Watanabe, Mikio Ishida, Akio Hamada
  • Melting apparatus
    Patent number: 4467732
    Abstract: A melting apparatus has a low temperature melting portion (29), an exhaust gas cooling portion (26), and a dust collecting portion (B27) which are arranged, in succession, in an exhaust gas duct (54) of a melting furnace (B22). A low boiling point dust collected in the dust collecting portion (B27) is returned to the low temperature melting portion (29) for melting by retention heat of an exhaust gas flowing into the exhaust gas duct (54).
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: August 28, 1984
    Assignee: Kubota, Ltd.
    Inventor: Kotaro Taniguchi
  • Ultrasonic flaw detection of a pipe
    Patent number: 4467654
    Abstract: A method of ultrasonic flaw detection of a pipe, worth particularly for instance for a heater pipe as is used for catalytic gas reforming with steam. A transmitter probe and a receiver probe are disposed on the pipe outer surface with suitable spacing one from the other both in axial or longitudinal direction and in peripheral direction of the pipe. The transmitter probe launches ultrasonic radiation under proper angle of incidence upon the pipe outer surface at the point of entering material of the pipe, to be refracted under a particular angle of refraction so that it may then pass through the material of the pipe straight to another point upon the pipe outer surface. The receiver probe receives the ultrasonic radiation transmission echo. Flaw in the material of the pipe is detected from fluctuation of the echo, as seen upon scanning the pipe surface by moving the transmitter and receiver probes.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: August 28, 1984
    Assignees: Kubota, Ltd., Osaka Gas Kabushiki Kaisha
    Inventors: Shinichi Murakami, Junichi Sugitani, Teruo Yoshimoto
  • Tractor transmission structure
    Patent number: 4463623
    Abstract: A tractor transmission structure including a first and a second gear transmissions operatively connected in series, each gear transmission providing two speeds. The invention provides a single change-speed lever to operate the two gear transmissions. The change-speed lever is guided along a U-shaped opening to obtain three speeds from the gear transmissions, a low speed, an intermediate speed and a high speed.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: August 7, 1984
    Assignee: Kubota, Ltd.
    Inventors: Junji Miyata, Yasuhisa Matsushita
  • Change-speed apparatus for a tractor
    Patent number: 4462273
    Abstract: A change-speed apparatus for a tractor for transmitting engine power to running travel apparatuses via a main change-speed mechanism, an auxiliary change-speed mechanism and a forward-and-rearward-travel-shifter mechanism. These mechanisms are arranged in series in fore-and-aft direction of a machine body and a shifter lever for the said forward-and-rearward-travel-shifter mechanism is disposed in juxtaposition to a main change-speed lever for the said main change-speed mechansim.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: July 31, 1984
    Assignee: Kubota, Ltd.
    Inventors: Takashi Yoshii, Yasuyuki Horii, Tomeaki Tama
  • Walk-behind type work vehicle
    Patent number: 4455813
    Abstract: A walk-behind type work vehicle has two running wheels on an axle, an upright power-take-off shaft for driving a selectably attachable implement, as well as an engine with an upright output shaft forwardly upwardly of the running wheels. Transmission system is adapted to transmit the power from the engine output shaft as parallelly divergingly branches off to the running wheels and to the power-take-off shaft.
    Type: Grant
    Filed: April 7, 1982
    Date of Patent: June 26, 1984
    Assignee: Kubota, Ltd.
    Inventor: Takashi Hira
  • Apparatus for controlling agricultural tractor
    Patent number: 4450927
    Abstract: An agricultural tractor in which two sets of pedals are mounted on the tractor body forwardly and rearwardly with the rearward pedals at a higher position than the forward pedals. A seat can be selectively fixed at a rearward position opposed to the forward pedals or a forward position opposed to the rearward pedals, the forward position of the seat being higher than the rearward position. A steering wheel can be fixed to either a forward or rearward position corresponding to the position of the seat.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: May 29, 1984
    Assignee: Kubota, Ltd.
    Inventors: Kazuo Hirata, Masao Takagi
  • Heat resistant cast iron-nickel-chromium alloy
    Patent number: 4448749
    Abstract: A heat resistant cast iron-nickel-chromium alloy outstanding in creep fracture strength at high temperatures and resistance to thermal shock and to carburizing and containing the following components in the following proportions in terms of % by weight:C:0.3-0.6,O<Si.ltoreq.2.0,O<Mn.ltoreq.2.0,Cr:20-30,Ni:30-40,Nb+Ta:0.3-1.5,N:0.04-0.15,B:0.0002-0.004,Ti:0.04-0.50 and0.07<Al.ltoreq.0.50the balance being substantially Fe.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: May 15, 1984
    Assignee: Kubota Ltd.
    Inventors: Junichi Sugitani, Teruo Yoshimoto, Makoto Takahashi
  • Heat resistant alloy excellent in bending property and ductility after aging and its products
    Patent number: 4444589
    Abstract: A heat resistant alloy excellent in bending property and ductility after aging, comprising 0.12 to 0.33% (by weight, the same as hereinafter) of C, less than 1.2% of Si, less than 1.5% of Mn, 23 to 25% of Cr, 37 to 40% of Ni, 0.5 to 1.8% of Nb and 0.04 to 0.15% of N, the balance being substantially Fe and unavoidable impurities, with the mutual relationship of C and Si contents represented by the range indicated by hatching in FIG. 1, which may be manufactured into tubes by centrifugal casting, to be used as deformed tubes after bending.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: April 24, 1984
    Assignee: Kubota, Ltd.
    Inventors: Junichi Sugitani, Makoto Takahashi
  • Tube for thermal cracking or reforming hydrocarbon
    Patent number: 4444731
    Abstract: A reactor tube for thermally cracking or reforming hydrocarbons comprising an outer tube member made of Ni-containing heat resisting material and having enhanced mechanical strength with a large wall thickness, and an inner tube member of small wall thickness fitted in the outer tube member and made of heat resisting material free from Ni or with a low Ni content. The inner and outer tube members have been subjected to a diffusion treatment with a thin coating of Ni-P solid solution provided at the junction therebetween and thereby bonded together.
    Type: Grant
    Filed: February 25, 1982
    Date of Patent: April 24, 1984
    Assignees: Kubota Ltd., Toyo Engineering Corporation
    Inventors: Keizo Konoki, Takanobu Shinohara, Ikuyoshi Kochi, Keiichi Shibata, Hisakatsu Nishihara, Toshiaki Morichika, Junichi Sugitani, Koji Tsuchida
  • Tube for thermal cracking or reforming of hydrocarbon
    Patent number: 4444732
    Abstract: A reactor tube for thermally cracking or reforming of hydrocarbons wherein a reacting layer contacting hydrocarbons is made of heat resisting steel comprising, in terms of % by weight, 0.3 to 1.5% C, up to 3% Si, 6 to 15% Mn, 20 to 30% Cr, up to 3% Nb, up to 0.15% N, the balance being substantially Fe and a covering layer which covers the said reacting layer is made of Fe-Cr-Ni heat resisting steel and is fused to the reacting layer at their boundary.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: April 24, 1984
    Assignees: Kubota Ltd, Toyo Engineering Corporation
    Inventors: Keizo Konoki, Takanobu Shinohara, Ikuyoshi Kochi, Toshio Anzai, Hisakatsu Nishihara, Junichi Sugitani, Koji Tsuchida
  • Roll for continuous casting
    Patent number: 4442883
    Abstract: A continuous casting roll comprises a roll body having a cooling water bore coaxially therewith, and a sleeve fitted around the roll body and having one end fixed to the roll body and the other end as a free end. The roll body has a trunk portion and a shaft portion at each end of the trunk portion. A plurality of cooling water channels provided between the trunk portion and the sleeve extend in parallel axially thereof and have opposite ends in communication with the water bore. The sleeve is fitted around the roll body by a shrink fit the interference of which decreases steadily from the fixed end toward the free end to permit free thermal deformation of the sleeve toward the free end.
    Type: Grant
    Filed: March 9, 1982
    Date of Patent: April 17, 1984
    Assignee: Kubota Ltd.
    Inventors: Yoshiaki Yamakami, Arata Yoshimitsu
  • Non-magnetic alloy having high hardness
    Patent number: 4441926
    Abstract: An alloy comprising, by weight, 0.1-0.6% C, up to 2% Si, 5-15% Mn, 5-15% Cr, 5-13% Ni, 1-3% V, and at least one of up to 1% Mo and up to 2% Nb, the balance being substantially Fe and inevitable impurities. The alloy has an outstanding non-magnetic property of up to about 1.004 in magnetic permeability and high hardness of above about 215 in Vickers hardness and is useful for electromagnetic stirrer rolls for continuous casting equipment.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: April 10, 1984
    Assignee: Kubota Ltd.
    Inventors: Hisashi Hiraishi, Yoshiaki Yamakami, Atsunobu Shintani
  • Heat resistant cast iron-nickel-chromium alloy
    Patent number: 4442068
    Abstract: A heat resistant cast iron-nickel-chromium alloy outstanding in creep fracture strength at high temperatures and resistance to thermal shock and to carburizing and containing the following components in the following proportions in terms of % by weight:C: 0.3-0.6,O<Si.ltoreq.2.0,O<Mn.ltoreq.2.0,Cr: 20-30,Ni: 30-40,W: 0.5-5.0,N: 0.04-0.15,B: 0.0002-0.004,Ti: 0.04-0.50 and0.07<Al.ltoreq.0.50the balance being substantially Fe.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: April 10, 1984
    Assignee: Kubota Ltd.
    Inventors: Junichi Sugitani, Teruo Yoshimoto, Makoto Takahashi
  • Molding device for nested pipes
    Patent number: 4440300
    Abstract: A device for holding pipes of different diameters in a nested state comprising a plurality of engaging members each having at an intermediate portion thereof an abutting portion adapted to contact the socket end of each diametrically small pipe for restraining the small pipe from moving axially thereof, each of the engaging members being provided at least at its one end with an engaging portion fittingly engageable in an annular groove formed in the inner periphery of the socket of the diametrically largest pipe; and one or more connecting means for removably connecting the engaging members together. The holding device comprises light-weight components, is simple in construction and can be attached to nested pipes easily for holding the pipes reliably at all times.
    Type: Grant
    Filed: April 14, 1982
    Date of Patent: April 3, 1984
    Assignee: Kubota, Ltd.
    Inventors: Tatsuo Kanazawa, Tsuneo Suyama
  • Machine body inclination detector device
    Patent number: 4435907
    Abstract: A machine body inclination detector device for detecting change in position of a float with respect to a machine body according to the inclination of the machine body. The float is constructed such that the buoyancy of the float does not undergo a great change even though the liquid level is inclined.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: March 13, 1984
    Assignee: Kubota, Ltd.
    Inventors: Shigeaki Okuyama, Norimi Nakamura, Osami Hashimoto
  • Holding device for nested pipes
    Patent number: 4434892
    Abstract: A device for holding nested pipes which comprises an abutting member adapted to bear against the socket ends of all the pipes, and radial-axial retainer means removably mountable on the abutting member and having an engaging projection fittingly engageable in an annular groove of the diametrically larger of two adjacent pipes included in the pipes and engaging stepped means engageable with an annular shoulder of the diametrically smaller of the two pipes. The device is composed of a small number of parts, is therefore inexpensive to make and easy to install on the pipes and reliably holds the pipes even when the two adjacent pipes differ greatly in diameter. Such devices are usable as units to provide a compact and lightweight overall holding device since a mount frame which would add to the weight of the device is not always needed.
    Type: Grant
    Filed: June 25, 1982
    Date of Patent: March 6, 1984
    Assignee: Kubota, Ltd.
    Inventors: Tatsuo Kanazawa, Tsuneo Suyama
  • Helical intake port type suction unit for horizontal single-cylinder direct injection type diesel engine
    Patent number: 4433651
    Abstract: Suction unit for an engine of horizontal single-cylinder direct injection type intended for producing a swirl in a suction air stream by means of a helical intake port, wherein, firstly, the intake port is formed to be "S"-shaped with its mid-section linear and prolonged for increasing the inertia force imparted to the suction air stream without increasing the width of the cylinder head and, secondly, the linear mid-section of the "S"-shaped intake port is formed to continue smoothly into an helical section so that the suction air stream enters unattenuated and guided by the helical passage to swirl up to approx. 180.degree. under acceleration before it enters a combustion chamber and the powerful swirl thus produced is further developed as it advances toward the center of the combustion chamber.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: February 28, 1984
    Assignee: Kubota Ltd.
    Inventors: Kiyomi Nakakita, Keiichiro Yamada
  • High chrome work roll
    Patent number: 4433032
    Abstract: In a high chrome work roll, between the outer layer of a cast iron containing 10.about.25 weight % Cr and the core of a ductile cast iron containing less than 1.5 weight % Cr, an intermediary layer of a cast iron containing 5.about.10 weight % Cr is provided, and united therewith integrally in the metallurgical sense.This high chrome work roll is manufactured by forming the outer layer by casting the molten metal into a revolving mold of a centrifugal caster; forming the intermediary layer by casing into this mold the molten metal to form a cast iron containing less than 1.0% Cr, before the inside surface of the outer layer has been set, and finally forming the core by casting the molten metal to form a ductile cast iron into this mold, the existence of the intermediary layer preventing as much as possible Cr from diffusing and mixing into the core.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: February 21, 1984
    Assignee: Kubota Ltd.
    Inventors: Shiro Nakamura, Yoshihiro Nakagawa, Takashi Hashimoto
  • Earth moving machine
    Patent number: D273384
    Type: Grant
    Filed: October 14, 1982
    Date of Patent: April 10, 1984
    Assignee: Kubota, Ltd.
    Inventors: Hitoo Nasu, Yoshishioro Okita, Masami Hirooka, Yoshiaki Yanoshita, Yoshio Tomiyama, Kinichi Murata