Patents by Inventor Tamiyoshi Kasahara

Tamiyoshi Kasahara 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: 6116627
    Abstract: A front suspension for an automotive vehicle includes a wheel supporting member for rotatably supporting a road wheel of the vehicle. A lower link has a first end section rotatably connected to a lower section of the wheel supporting member, and a second end section connected to a vehicle body-side member so as to be swingable generally in a vertical direction of the vehicle. A connection member is rotatably installed to an upper section of the wheel supporting member so as to be rotatable around a first axis which passes through the wheel supporting member and extends generally in the vertical direction of the vehicle. A shock absorber has an upper end section pivotally connected to the vehicle body-side member, and a lower end section swingably connected to the connection member to be rotatable around a second axis which extends generally in a fore-and-aft direction of the vehicle. A spring is supported by the shock absorber and has a third axis.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: September 12, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yoshihiro Kawabe, Takuya Murakami, Kenji Kawagoe, Tamiyoshi Kasahara
  • Patent number: 6062580
    Abstract: A steering knuckle has an upper portion and a lower portion. A lower link has an outer end pivotally supporting the lower portion of the steering knuckle and an inner end swingably supported by a vehicle body. A connecting member is mounted to the upper portion of the knuckle and rotatable about a first axis relative to the upper portion. A shock absorber has an upper end pivotally connected to the vehicle body at a first point and a lower portion connected to the connecting member. An upper link is pivotally connected to the connecting member at a second point and pivotally connected to the vehicle body at a third point. A tie rod is connected to the supporting member to rotate the same about the first axis. The first axis intersects a second axis passing through the second and third points and passes through a limited area containing the first point.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: May 16, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yoshihiro Kawabe, Takuya Murakami, Kenji Kawagoe, Tamiyoshi Kasahara
  • Patent number: 6027130
    Abstract: A steering knuckle has an upper portion and a lower portion. A lower link has an outside end rotatably connected to the lower portion of the steering knuckle and an inside end swingably supported by a vehicle body. A connecting member is rotatably mounted to the upper portion of the steering knuckle. A first axis (Lk) is defined about which the connecting member rotates relative to the upper portion of the steering knuckle. A shock absorber has an upper end pivotally connected to the vehicle body and a lower end connected to the connecting member. An upper link has an inside end pivotally connected to the vehicle body and an outside end pivotally connected to the connecting member. A second axis (Lu) is defined which passes through both the pivoted inside end of the upper link and the pivoted outside end of the same. A tie rod is connected to the steering knuckle to pivot the same about the first axis.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: February 22, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yoshihiro Kawabe, Tamiyoshi Kasahara
  • Patent number: 5851016
    Abstract: A wheel suspension for rear wheels of an automotive vehicle, comprises a coil spring on a rear lateral link having an articulation point on an axle housing, a front lateral link, a radius rod and an upper arm having an articulation point on the axle housing at a position higher than a wheel center. A shock absorber is arranged such that its longitudinal axis crosses the wheel center as viewed the axle housing in a transverse direction with respect to a normal forward driving direction. The upper arm is connected to a suspension member via a forward pivot and a rearward pivot.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: December 22, 1998
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenji Kawagoe, Takuya Murakami, Masaharu Satou, Takaaki Uno, Hideo Aimoto, Tamiyoshi Kasahara, Hiroshi Nagaoka
  • Patent number: 5765858
    Abstract: A rear wheel suspension arrangement for an automotive vehicle provides an axle housing rotatably mounting rear vehicular road wheels, each of the wheels having a wheel center. At each wheel, a radius rod which extends forwardly and inwardly, as viewed in a normal forward direction of the vehicle, is connected to the axle housing at a first articulated connection at a position lower than the wheel center. Further, a front lateral link, extending generally transversely to the forward direction of the vehicle is connected to the axle housing at a second articulated connection also located below the wheel center. In addition, a rear lateral link, positioned rearwardly of the front lateral link and extending in the traverse direction of the vehicle, is connected to the axle housing at a third articulated connection also located below the wheel center. The suspension structure also includes an upper arm having an articulated connection to the axle housing at a position above the wheel center.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: June 16, 1998
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenji Kawagoe, Takuya Murakami, Masaharu Satou, Takaaki Uno, Hideo Aimoto, Tamiyoshi Kasahara, Hiroshi Nagaoka
  • Patent number: 5702122
    Abstract: An axle supporting member for a rear wheel is suspended to a suspension member by an upper link system which includes an A-arm and a side rod. The forward lower link member and the side rod are respectively arranged in front and rear of a vertical plane passing through a rotary axis of the rear wheel, while a suspension spring and a shock absorber are seated on the forward lower link member positioned in front of the above-mentioned vertical plane with respect to the longitudinal direction of the vehicle. Accordingly, an initial load transmitted from the suspension spring is mainly borne by the front end part of the suspension member, so that an initial load exerted to the rear end part of the suspension member becomes smaller. Thereby, it is possible to reduce the resilient deformation of bushings in the front and rear parts of the suspension member upon application of a wind-up input force.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: December 30, 1997
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masaharu Satou, Tamiyoshi Kasahara, Takuya Murakami, Kenji Kawagoe, Takaaki Uno, Hideo Aimoto, Tamaki Horiuchi
  • Patent number: 5511817
    Abstract: A vehicle axle suspension system including wheel support members for rotatably supporting road wheels, a suspension member for supporting the road wheel support members for vertical swinging movement, and elastic suspension elements. The elastic suspension elements include a pair of front elastic suspension elements provided at different suspension points in front of the road wheel support members for elastically mounting the suspension member to the vehicle and a pair of rear elastic suspension elements provided at different suspension points behind the road wheel support members for elastically mounting the suspension member to the vehicle. The elastic suspension elements are positioned to provide an understeer characteristic when a lateral force acts on a suspension roll center determined by suspension geometry to rotate the suspension member around a virtual roll axis extending through an elastic center of the front elastic suspension elements and an elastic center of the rear elastic suspension elements.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: April 30, 1996
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tamiyoshi Kasahara, Yohsuke Akatsu, Kenji Kawagoe, Yutaka Endo, Hiroshi Noguchi