Patents by Inventor Hajime Niki

Hajime Niki 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).

  • Automatic stroke adjustment device for a brake actuator
    Patent number: 6619442
    Abstract: An automatic stroke adjustment device for a brake actuator having clutch rings (240, 340, 440, 540, 546, 640) making an irreversible screw engagement relatively rotatable for the amount of exceeding the backlash by releasing the clutch engagement to rotate when exceeding the backlash of reversible screw engagement and maintaining the clutch engagement when in releasing the brake actuator while the brake actuator is in an active state to improve the processability, reduce the weight, and prevent overadjustment of the shoe clearance during the thermal expansion of the brake drum.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 16, 2003
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Hajime Niki, Hiroyuki Terada
  • Automatic stroke adjustment device for a brake actuator
    Publication number: 20020036125
    Abstract: An automatic stroke adjustment device for a brake actuator having clutch rings (240, 340, 440, 540, 546, 640) making an irreversible screw engagement relatively rotatable for the amount of exceeding the backlash by releasing the clutch engagement to rotate when exceeding the backlash of reversible screw engagement and maintaining the clutch engagement when in releasing the brake actuator while the brake actuator is in an active state to improve the processability, reduce the weight, and prevent overadjustment of the shoe clearance during the thermal expansion of the brake drum.
    Type: Application
    Filed: September 26, 2001
    Publication date: March 28, 2002
    Inventors: Hajime Niki, Hiroyuki Terada
  • Shoe gap adjusting device for drum brake
    Patent number: 5996744
    Abstract: A shoe gap adjusting device includes a piston for pressing a brake shoe through a piston head, having a projecting end part with a boot cover for protecting an elastic boot that seals an end part of a cylinder body. A shoe gap adjusting ring is fitted on the end part of the piston in a non-rotatable manner. A elastic piece at the inner periphery of the cover axially extends through a cut-out in the ring and elastically supports the outer peripheral surface of the head so that the piston head is elastically attached to the piston. A tool can be inserted through an opening and engaged with an outer peripheral cut-out of the ring, for rotating the ring relative to a bolt and performing an adjustment of the shoe gap. The device simultaneously allows the protection for the elastic boot and realization of rotational operability of the shoe gap adjusting ring by the tool.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: December 7, 1999
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Hajime Niki, Takashi Ikeda, Kazuyuki Matsuishi, Hiroo Nakagawa