Patents by Inventor Masayoshi Tanikawa

Masayoshi Tanikawa 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: 5064252
    Abstract: A brake fluid pressure controller is interposed between a master cylinder and the rear wheel cylinders. The controller comprises a housing having an inlet, an outlet and a chamber which provides communication between the inlet and the outlet. An annular sealing member is disposed around a piston in the chamber with a clearance left therebetween. The sealing member has an inner perimeter defining a valve seat and an outer perimeter defining a flexible lip portion which is in contact with the internal wall of the chamber. When a valve head of the piston sits on the valve seat of the sealing member, the inner perimeter of the valve seat cuts off the communication between the inlet and the outlet. Meanwhile, the outer perimeter permits a communication from the outlet to the inlet but shuts off a communication from the inlet to the outlet. A spring urges the piston to a direction in which the valve head separates from the valve seat.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: November 12, 1991
    Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Fumio Fujimori, Masayoshi Tanikawa, Takashi Nagashima, Kiyonobu Nagamori, Hideo Onuki
  • Patent number: 4643043
    Abstract: A vehicle hand brake lever assembly for actuating the vehicle parking brake. The lever assembly includes an axially slidable plunger mounted on a support and having one end connected with a brake actuating member. The plunger and the support have a ratchet mechanism for holding the plunger at the brake applying position. The ratchet mechanism can be released by rotating the plunger about its longitudinal axis. A handle assembly is provided at the other end of the plunger and comprises a handle having a handle shaft. A sleeve fitted to a cylindrical guide member is secured to one of the sleeve and the handle shaft, and a lock member to the other. The lock member is axially slidably received in the guide member and provided with a cam profile for cooperation with a cam profile provided on the sleeve. The lock member is spring biased toward the sleeve so that the cam profiles are normally engaged with each other to thereby maintain the handle shaft at a predetermined relationship with respect to the plunger.
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: February 17, 1987
    Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kubushiki Kaisha
    Inventors: Yohichi Furuta, Takeo Yamasaki, Tomio Tachino, Masayoshi Tanikawa