Koyo Seiko Company, Ltd.

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Otai Tekko Kabushiki Kaisha and Koyo Seiko Co., Ltd.

Yasushi Kadota

Yoshikazu Nishida

Yoshiyuki Inoue

Sadakatsu Ushio

Hiroshi Kotani

Nariaki Endo

Takeomi Yamamoto

Hidekazu Sakakibara

Tadasu Yamakawa

Kazuo Ide

Kanichi Sumida

A hydraulic valve lifter for use in an internal combustion engine, comprises an inverted cup-like body, an inverted cup-like plunger housed within the body, a high pressure chamber defined between the body and the plunger, and an oil passage through which an oil is fed to the high pressure chamber. At least one oil discharge hole is defined in the plunger and extends from the oil passage to open to a valve stem so as to lubricate between the valve stem and a valve guide.

Hydraulic valve lifter

A belt tensioner comprising an intermediate annular member rotatably provided around a fixed member in the form of a solid cylinder and to be secured to a stationary portion, a movable eccentric member in the form of a solid cylinder and rotatably provided around the intermediate annular member eccentrically therewith, an idler in the form of a hollow cylinder and rotatably provided around the movable eccentric member for contact with a belt, and a spring provided between the stationary portion or the fixed member and the movable eccentric member for biasing the movable eccentric member in a direction to bring the idler into pressing contact with the belt. The intermediate annular member has a cylindrical or tapered first sliding surface in contact with the fixed member and a cylindrical or tapered second sliding surface in contact with the eccentric member. One of the first and second sliding surfaces of the annular member is a high-friction sliding surface, and the other surface is a low-friction sliding surface. An oil of high viscosity is provided between the low-friction sliding surface and the surface of the fixed member or the eccentric member in contact therewith.

Belt tensioner

A tensioner comprising a first cylindrical member to be fixedly attached to a stationary portion, a movable eccentric member in the form of a cylinder and eccentrically rotatably provided around the first member, an idler in the form of a hollow cylinder and rotatably provided around the movable eccentric member for contact with a wrapping connector driving member, and a spring provided between the stationary portion and the movable eccentric member for biasing the eccentric member in a direction to press the idler into contact with the wrapping connector driving member. A one-way clutch is provided between the first member and the movable eccentric member.

Chain or belt tensioner with a one-way clutch

A universal joint including an intermediate joint member having a spherical portion as assembled and four ridges formed on the outer surface of the spherical portion and defining four guide furrows therebetween, and two shaft each having one end bifurcating into two arms. The two arms of one of the shafts are fitted in two of the guide furrows positioned symmetrically, and the two arms of the other shaft are fitted in the other two guide furrows positioned symmetrically. The entire joint member comprises two divided half segments arranged in combination axially of the member. Alternatively, the spherical portion comprises two divided half segments arranged in combination axially thereof, one of the spherical half segments being integrally formed with two of the ridges positioned symmetrically and extending to over the outer surface of the other spherical half segment, the other spherical half segment being integrally formed with the other two ridges positioned symmetrically and extending to over the outer surface of said one spherical half segment. In either of these arrangements, an elastic member is provided at the combined portion of the two segments inside the contour of the combined portion for biasing the segments at least circumferentially thereof out of register with each other.

Universal joint

A tensioner comprising a solid cylindrical fixed member to be fixedly attached to a stationary portion, a movable eccentric member in the form of a solid cylinder and eccentrically rotatably provided around the fixed member, an idler in the form of a hollow cylinder and rotatably provided around the movable eccentric member for contact with a wrapping connector driving member, and a spring provided between the stationary portion and the movable eccentric member for biasing the eccentric member in a direction to press the idler into contact with the wrapping connector driving member. A high-viscosity oil is provided in a clearance between the outer periphery of the fixed member and the inner periphery of the movable eccentric member.

Growing community of inventors

Osaka, Japan

Yasushi Kadota