Patents by Inventor Yoshihisa Iwanaga

Yoshihisa Iwanaga 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: 6514002
    Abstract: A grease hold extends in an axial direction from one end of a rotary pin to an eccentric portion, and a pair of grease injection holes communicating to the grease hole is open on the outer circumferential surface of the eccentric portion. These grease injection holes are arranged so as to be axially separated on both sides from a central portion C of the eccentric portion by L/4 when L is an length of the eccentric portion.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: February 4, 2003
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenichi Katae, Kenji Chino, Yoshihisa Iwanaga
  • Patent number: 6502839
    Abstract: A sensor installation structure and method for a potentiometer located on the exterior of a fork lift. A sensor cover is fixed to a bracket to protect the potentiometer. The cover has an opening permitting the passage of lead wires. A fluid sealant is charged between the cover and the potentiometer to seal the potentiometer.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: January 7, 2003
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Yoshihisa Iwanaga
  • Patent number: 6402168
    Abstract: A steering device for an industrial vehicle such as forklift. A pair of knuckle arms are rotatably supported at the ends of a rear axle. Each knuckle arm supports a rear wheel. A cylinder located in the rear axle includes an actuator rod. A pair of tie-rods couple the ends of the actuator rod to the knuckle arms. A toe angle adjusting mechanism is located between one end of the actuator rod and the corresponding tie-rod. The toe angle adjusting mechanism includes an adjuster pin having an eccentric shaft. The toe angle of the rear wheel that does not have the toe angle adjusting mechanism is adjusted by changing the neutral position of the actuator rod relative to the cylinder. Thereafter, the toe angle of the other rear wheel is adjusted by the toe angle adjusting mechanism, which facilitates adjustment of the toe angle of the wheels. The location and number of angle adjusting mechanisms are varied in alternate embodiments.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: June 11, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Kenichi Katae, Yoshihisa Iwanaga
  • Patent number: 6331010
    Abstract: An industrial vehicle has a frame and an axle swingalbly connected with the frame, wherein a cylinder interposed between the frame and the axle selectively extends and retracts so as to absorb a swinging motion of the axle. The cylinder is coupled to the frame and the axle in a rotatable manner within a plane intersecting an axis of a center about which the axle swings.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: December 18, 2001
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Yoshihisa Iwanaga
  • Patent number: 6293022
    Abstract: A device for detecting the wheel angle of forklift rear wheels is disclosed. A cylinder steers the rear wheels by means of steering mechanisms based on manipulation of a steering wheel. The steering mechanisms include kingpins that support the rear wheels to be rotatable in relation to a rear axle. Each kingpin rotates integrally with the corresponding rear wheel. A wheel angle sensor, which includes a potentiometer, is fixed to the rear axle by a bracket. The position of the sensor corresponds to the position of one of the kingpins. The sensor detects the rotational angle of the kingpin as the wheel angle of the rear wheels.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: September 25, 2001
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Masaya Hyodo, Yoshihisa Iwanaga
  • Patent number: 6261182
    Abstract: An installation structure of a rotation detector for detecting a rotation amount of a rotational shaft such as a kingpin. The installation structure prevents wear and damage to an input shaft of the rotation detector caused by a radial force applied to the input shaft and has high detection accuracy by eliminating slack between the rotational shaft and the input shaft. The rotation detector is fixed to a support member rotatably supporting the rotational shaft such that the input shaft is substantially coaxial with the rotational shaft. The input shaft is coupled to the rotational shaft through a rotation transmitting means. The rotation transmitting means permits the axis of the input shaft to be offset from the axis of the rotational shaft and limits relative rotation between the input shaft and the rotational shaft.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: July 17, 2001
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Masaya Hyodo, Yoshihisa Iwanaga, Kazuo Ishikawa
  • Patent number: 6257679
    Abstract: A rear axle beam for pivotally supporting a body frame of an industrial vehicle, including a boss-engaging areas formed on each end of the axle beam, and at least a pair of bosses, is provided. Each boss includes an axle-engaging area and is fixed to a respective end of the axle beam such that each axle-engaging area engages with a corresponding one of the boss-engaging areas. The novel axle beam reduces the force applied to weld beads between the bosses and the rear axle body of industrial vehicles.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: July 10, 2001
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Kenichi Katae, Yoshihisa Iwanaga
  • Patent number: 6223624
    Abstract: A parking brake device includes a base member and at least one cable connected to a braking system at one end. The other end of the cable is connected to a connecting member. The connecting member is slidably supported by the base member. A brake lever is rotatably attached to the base member so as to be erectable around a position in the vicinity of an extension extending in the sliding direction of the connecting member. A junction member is rotatably connected to the connecting member at one end. The other end of the connecting member is connected to at least one moving member to which the junction member is rotatably attached. The moving member is moveably attached to the brake lever. An adjustment mechanism is provided outside the brake lever. The adjusting mechanism adjusts the tension of the cable through the junction member and the connecting member by changing the position of the moving member.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: May 1, 2001
    Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Otsuka Koki Co., Ltd.
    Inventors: Yoshihisa Iwanaga, Satoru Masuda
  • Patent number: 6079110
    Abstract: A device for detecting the wheel angle of forklift rear wheels is disclosed. A cylinder steers the rear wheels by means of steering mechanisms based on manipulation of a steering wheel. The steering mechanisms include kingpins that support the rear wheels to be rotatable in relation to a rear axle. Each kingpin rotates integrally with the corresponding rear wheel. A wheel angle sensor, which includes a potentiometer, is fixed to the rear axle by a bracket. The position of the sensor corresponds to the position of one of the kingpins. The sensor detects the rotational angle of the kingpin as the wheel angle of the rear wheels.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: June 27, 2000
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kenji Chino, Masaya Hyodo, Yoshihisa Iwanaga
  • Patent number: 6047789
    Abstract: A vehicle having a toe angle adjustment mechanism. The vehicle has a frame member, a steerable wheel, a steering knuckle pivotally connecting the wheel to the frame member about a substantially vertical axis, a steering mechanism for steering the vehicle, and a steering actuator included as part of the steering mechanism for moving in a predetermined direction to cause a steering change. A transfer member is connected to the wheel for transferring a force applied by the actuator to the wheel to effect the steering change. The adjustment mechanism pivotally couples the distal end of the transfer member to distal end of the steering actuator about an adjustable pivot axis. The adjustment mechanism permits adjustment of the toe angle of the wheel and varies the position of the adjustable pivot axis with respect to one of the distal end portions to vary the toe angle.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: April 11, 2000
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Yoshihisa Iwanaga
  • Patent number: 5303609
    Abstract: A toggle type parking brake lever apparatus capable of surely holding a brake lever at a brake application position is provided. Attached to the brake lever is a pivotable stopper pawl, with which a stopper surface formed on a stopper plate is adapted to be engaged in a brake application condition so as to inhibit the brake lever from being turned in a brake releasing direction. A stopper releasing rod with a push button is provided longitudinally of the brake lever to pivot the stopper pawl, thereby to disengage the stopper pawl from the stopper face. The invention is also applicable to a brake lever which is supported to a lever bracket, tiltably back and forth, and left and right, by means of a universal joint.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: April 19, 1994
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Yoshihisa Iwanaga, Yoshitaka Koketsu
  • Patent number: 5058694
    Abstract: A reservoir tank is disposed in a housing between a front protector and a front panel removably mounted to the front protector, by a support device. The support device supports the reservoir tank in such a way that the position of the tank can be adjusted. When the front panel is removed and the reservoir tank is moved towards the front of the forklift, the operation of adding brake fluid can be carried out with ease as there are no obstacles above the reservoir tank.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: October 22, 1991
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventor: Yoshihisa Iwanaga