Patents by Inventor Akihiro Mayama

Akihiro Mayama 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: 7213801
    Abstract: In a vibration damping apparatus for supporting an engine on a vehicular body, an elastic member damps a vibration developed from the engine, a stopper is brought in contact with the elastic member to limit a transmission of a fluctuation developed on the engine therethrough, and a vehicular body support member integrated with the elastic member to fix the elastic member on the vehicular body, the elastic member including a stopper fixing portion placed at a first position opposite to a second position faced toward the engine to fix the stopper at the first position and the stopper including a bending portion, one side thereof with respect to the bending portion being fixed onto the engine and the other side thereof with respect thereto being fixed onto the stopper fixing portion of the elastic member so as to grasp the elastic member between both sides of the stopper.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: May 8, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Akihiro Mayama
  • Patent number: 7182306
    Abstract: An engine mount including a rubber elastic body connecting an upper and lower mounting plate fixture and a rebound stopper mechanism having an upper stopper integrally formed with an upper mounting plate fixture and a lower stopper integrally formed with a lower mounting plate fixture. The upper stopper is bolted to a power unit at a position deviating more toward the inside of the power unit than a position of an elastic main axis of the rubber elastic body on the upper mounting plate fixture so that the stopper mechanism in the rebound direction is positioned generally vertically below the position where the upper stopper is bolted to the power unit, whereas the lower stopper is bolted to the vehicle body at a position deviating more toward the inside of the power unit than the position of the elastic main axis of the rubber elastic body on the lower fixture.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: February 27, 2007
    Assignees: Tokai Rubber Industries, Ltd., Nissan Motor Co., Ltd.
    Inventors: Jyoji Tsutsumida, Noboru Arakawa, Akihiro Mayama, Kazushi Saikusa
  • Publication number: 20050178943
    Abstract: An engine mount including a rubber elastic body connecting an upper and lower mounting plate fixture and a rebound stopper mechanism having an upper stopper integrally formed with an upper mounting plate fixture and a lower stopper integrally formed with a lower mounting plate fixture. The upper stopper is bolted to a power unit at a position deviating more toward the inside of the power unit than a position of an elastic main axis of the rubber elastic body on the upper mounting plate fixture so that the stopper mechanism in the rebound direction is positioned generally vertically below the position where the upper stopper is bolted to the power unit, whereas the lower stopper is bolted to the vehicle body at a position deviating more toward the inside of the power unit than the position of the elastic main axis of the rubber elastic body on the lower fixture.
    Type: Application
    Filed: February 7, 2005
    Publication date: August 18, 2005
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Jyoji Tsutsumida, Noboru Arakawa, Akihiro Mayama, Kazushi Saikusa
  • Patent number: 6802498
    Abstract: A cylindrical mounting apparatus includes: a cylindrical mount having an elastic body elastically connecting an inner and outer sleeve disposed in mutually spaced-apart relation; and a bracket independent of the cylindrical mount and having a pair of support plates opposed to each other with a spacing therebetween. The mount is interposed between the pair of support plates and fastened to the bracket by a mounting bolt extending through a bore of the inner sleeve across the support plates. Two positioning protrusions protrude from an inside surface of one support plate toward the other, and a mounting plate is disposed on one axial end of the inner sleeve extending diametrically. A recessed engaging portion of the mounting plate is brought into engagement with the positioning projections to place the mounting plate in a predetermined position about its center axis on the support plate.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: October 12, 2004
    Assignees: Tokia Rubber Industries, Ltd., Nissan Motor Co., Ltd.
    Inventors: Takashi Makino, Akihiro Mayama
  • Publication number: 20030214085
    Abstract: Disclosed is a cylindrical mounting apparatus including: a cylindrical mount having an elastic body elastically connecting an inner and outer sleeve disposed in mutually spaced-apart relation; and a bracket independent of said cylindrical mount and having a pair of support plates opposed to each other with a spacing therebetween. The mount is interposed between the pair of support plates and fastened to the bracket by a mounting bolt extending through a bore of the inner sleeve across the support plates. Two positioning protrusions protrude from an inside surface of one support plate toward the other, and a mounting plate is disposed on one axial end of the inner sleeve extending diametrically. A recessed engaging portion of the mounting plate is brought into engagement with the positioning projections to place the mounting plate in a predetermined position about its center axis on the support plate.
    Type: Application
    Filed: April 30, 2003
    Publication date: November 20, 2003
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., NISSAN MOTOR CO., LTD.
    Inventors: Takashi Makino, Akihiro Mayama
  • Publication number: 20020195759
    Abstract: In a vibration damping apparatus for supporting an engine on a vehicular body, an elastic member damps a vibration developed from the engine, a stopper is brought in contact with the elastic member to limit a transmission of a fluctuation developed on the engine therethrough, and a vehicular body support member integrated with the elastic member to fix the elastic member on the vehicular body, the elastic member including a stopper fixing portion placed at a first position opposite to a second position faced toward the engine to fix the stopper at the first position and the stopper including a bending portion, one side thereof with respect to the bending portion being fixed onto the engine and the other side thereof with respect thereto being fixed onto the stopper fixing portion of the elastic member so as to grasp the elastic member between both sides of the stopper.
    Type: Application
    Filed: June 17, 2002
    Publication date: December 26, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventor: Akihiro Mayama
  • Patent number: 5076550
    Abstract: A fluid filled elastomeric damping device has a diaphragm enclosing a working chamber and a diaphragm restraining mechanism for selectively restraining and freeing movement of the diaphragm and thereby varying a damping or operational characteristic of the device. The mechanism includes a pressing plate for pressing a blocking portion of the diaphragm against a seating surface of an outer casing member under a bias of a blocking force generating member and thereby rigidly closing a compensation passage communicating with the working chamber. The diaphragm is restrained in movement by the pressing plate when the solenoid is de-energized and freed in movement when the solenoid is energized.
    Type: Grant
    Filed: December 6, 1990
    Date of Patent: December 31, 1991
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akihiro Mayama, Masaru Takeda