Patents Assigned to Tohoku Mikuni Kogyo Kabushiki Kaisha
  • Patent number: 4948093
    Abstract: A solenoid valve including a solenoid and a second solenoid to which a smaller electric current is applied han is applied to the first solenoid. The first solenoid is provided at a core, and the second solenoid is provided at a support member connected to the core. A cup-shaped plunger is connected to a valve body opening and closing a passage, and is moved in accordance with an energization of the solenoid, to open and close the valve body. A contact member is connected to the plunger and inclined relative to the bottom wall of the plunger, to come into tight contact with the support member. A first magnetic path is formed in the core and a cylindrical side wall of the plunger, and a second magnetic path is formed in the support member and the contact member.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: August 14, 1990
    Assignee: Tohoku Mikuni Kogyo Kabushiki Kaisha
    Inventors: Toshimitsu Sugawara, Takeshi Iinuma, Tadashi Suzuki
  • Patent number: 4797073
    Abstract: A plunger pump has a plunger adapted to slide in the axial direction and rotate by a combination of worm and worm wheel. A cylindrical pump body has an axial extension at one free end through which a control pin extends upwardly at a right angle relative to the extension, while the plunger carried on the pump in a cantilever fashion has an inclined end face cam, an adjustment cam and a worm wheel on the same side as the axial extension. The worm wheel meshes with a worm directly connected to a crankshaft of an engine and the crankshaft is not held on the pump body. As the crankshaft is rotated, the plunger is caused to rotate by meshing engagement of the worm and the worm wheel and at the same time slide in the pump body by contact of the end face cam with the control pin whereby liquid held in the pump chamber is discharged from the delivery port.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: January 10, 1989
    Assignee: Tohoku Mikuni Kogyo Kabushiki Kaisha
    Inventor: Kenichi Kubota
  • Patent number: 4552312
    Abstract: A fuel injection valve has a collar-shaped stopper at the front of a plunger for restricting the plunger stroke between the stopper and the end of a guide pipe. The divergent conical surface or spherical surface is formed at the end of the guide pipe, a spherical surface which makes contact with the conical surface is formed at the opposite side of the stopper of the plunger to the ball, an automatic centering operation is performed at the stroke end of the plunger, thereby preventing the irregular wear of the ball valve and the seat surface to stabilize the performance for a long period of time.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: November 12, 1985
    Assignee: Tohoku Mikuni Kogyo Kabushiki Kaisha
    Inventors: Yasuo Ohno, Tadashi Seino, Yukio Ueno, Kenji Kariyama, Shinji Utsugi, Shigeo Okada