Aisin Seiki Kabushiki Kaisha

Takanobu Hori

Masaharu Hayashi

Hisashi Kodama

Shunzo Tsuchikawa

Motoharu Yoshida

Yoshio Okabe

Fuminao Arai

Fumio Arai

Hiorji Yamaguchi

The viscous fluid coupling is comprised of a drive shaft having a hollow casing rotatably mounted thereon with one end of the drive shaft extending into the hollow casing. The interior of the casing is divided into a reservoir chamber and an operating chamber by means of a dividing plate secured within the housing. The rotor on the end of the shaft is rotatably mounted within the operating chamber and a thermostatically responsive valve member is rotatably mounted within the reservoir chamber for controlling the flow of fluid through a first passage extending through the divider plate. A centrifugally responsive valve member is located within the divider plate for providing additional control of the fluid through the first passage from the reservoir chamber to the operating chamber. A second passage extends through the divider plate for permitting the flow of fluid from the operating chamber to the reservoir chamber in response to a pumping action generated by relative rotation between the rotor and the casing. According to one embodiment, the centrifugally responsive valve also controls the flow of fluid through the second passage so that fluid will continue to be pumped through the second passage subsequent to the closing of the first passage by the valve. In a second embodiment, a separate flexible, resilient one-way valve is provided for controlling the flow of fluid from the operating chamber to the reservoir chamber through the second passage in response to the pumping pressure created by relative rotation between the rotor and the casing.

Viscous fluid coupling having centrifugal valve means

A cooling fan to be located between an internal combustion engine and a radiator and rotatingly driven from a rotational shaft of the engine. The fan includes a plurality of blade elements radially projecting from a boss portion and a cylindrical ring formed at the outer ends of the blade elements coaxially with the boss portion. In each blade element, a base line, which is drawn through a base point located on a chord of blade between leading and trailing edges of the blade element at a distance of 40% from the leading edge in percentage to the length of the chord, describes a straight or moderately curved line from the inner to the outer end of the blade element, which is inclined rotationally forward of a radial line passing through the base point at the inner end of the blade element. This fan construction produces air flows containing axial and radial components of velocity to increase the air flows through the radiator irrespective of the existence of the internal combustion engine on the downstream side of the fan. Maximum air flow is obtained by projecting the trailing edge of the outer end of each blade element from the trailing edge of the above-mentioned ring by a length corresponding to 1/3 of the chord length of the outer blade end.

Cooling fan for internal combustion engine

An engine cooling fan driven by an engine and located in a shroud extending from a radiator to the engine including a hub having a cylindrical rear end portion for mounting the fan on the engine, a plurality of blades provided on the hub and a ring fixedly provided on tip portions of the blades and extending in an axial direction so as to fully encircle the tips of the blades and forming a radial clearance between the shroud and the ring, the ring including a rear end portion positioned axially rearwardly of the cylindrical rear end of the shroud and extending radially outwardly of the shroud thereby restricting air flow from the rear side of the fan into the radial clearance formed between the shroud and the ring.

Engine cooling fan

A hydraulic fulcrum lifting device for a valve actuating mechanism of an internal combustion engine in which the reservoir formed in the plunger is provided with a deflector encircling a port between the reservoir and a pressure chamber. The deflector functions to prevent air in the reservoir from being drawn through the port to the pressure chamber.

Engine valve actuating mechanism having a hydraulic fulcrum lifting

A self-contained hydraulic lash adjuster in which a sealing member is provided on the plunger for providing fluid tight seal between the plunger and a cylinder member. The sealing member is of a pair of lips both of which are in fluid tight contact with the cylinder member and are alternately deformed onto the cylinder member upon upward or downward movement of the plunger. During movement of the plunger, fluid-tight seal between the plunger and the cylinder member is assured with a little sliding friction therebetween.

Self-contained hydraulic lash adjuster

A cooling fan assembly for a powered vehicle, preferably adapted for automotive use, and having a hub and a plurality of radial fan blades made integral therewith and of synthetic and resilient resin material, the assembly being characterized by the provision of externally knurled bushings and a spacer member, the bushings being coinserted in holes in the hub and the spacer member, the spacer member being fixed to the bushings at one end of the bushings and pressed to one side face of the hub.

Multiblade plastic fan

A fan assembly including a hub portion from which blades and a stem are extended respectively radially outwardly and radially inwardly, the hub portion, the blades and the stem being formed of molded plastics and made integral with each other. The stem is connected to an output shaft of fluid coupling by means of bolts each of which passes through a bushing. The bushing having knurling portion at outer surface thereof is inserted in the hole of the stem and the periphery of the hole is melted by heating upon insertion of the bushing therein so as to ensure the connection of the fan assembly to the output member. In case that a spacer is interposed between the stem and a flange of the bush, the spacer is fixedly connected to the bushing.

Fan assembly

A viscous fluid coupling including a rotatable casing provided with a fluid operating chamber and a fluid reservoir chamber therein and having an axial opening formed in said casing, a rotor located in the fluid operating chamber and rotatable relative to the casing, a valve shaft rotatably received in the axial opening formed in the casing, a valve member 27 fixed to an inner end of the valve shaft and operable to control fluid communication between the fluid operating chamber and the fluid reservoir chamber, a bimetal coil located on an exterior portion of the casing, the bimetal coil being connected at inner and outer ends thereof to an outer end of the valve shaft and the casing, respectively, and a plurality of sealing rings axially spaced and interposed between the outer periphery of the valve shaft and a wall of the opening wherein the sealing rings include a resilient material.

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Toyota, Japan

Takanobu Hori