Abstract: A viscous fluid coupling device is comprised of (1) an input member, (2) a rotor secured to the input member, (3) an output member having therein an inner space and mounted rotatably on the input member, (4) a partition plate, for dividing the inner space into an operating chamber and a reservoir chamber for storing therein an amount of viscous fluid, secured to the output member and having a passage for establishing a fluid communication therebetween, (5) a thermal response valve, for opening and closing the passage, provided on the output member, (6) a labyrinth, for transmitting the rotation torque from the input member to the output member via the viscous fluid, provided therebetween so as to be positioned in the operating chamber, (7) a pump device, for returning the viscous fluid to the reservoir chamber, formed between an outer periphery of the rotor and an inner surface of the output member, and (8) a bypass device, for the direct supply of the viscous fluid supplied from the reservoir chamber to the

Abstract: Disclosed is an improved indicator, which includes a scale plate having a pointer rotatably mounted thereon; an ultraviolet light source for illuminating said scale plate; and indicia arranged on the scale plate for indicating a specific value in cooperation with the pointer, each of the indicia including first and second parts, and in which the second part includes fluorescent brightener ink or paint therein so as to be illuminated when the ultraviolet light source is turned on. When the ultraviolet light source is turned on, particularly at night, the second parts of the indicia will become visible so that the visibility of the indicia is changed from the daylight condition in which the light source is turned off. Namely, an interesting design change of the indicia of the indicator can be obtained.

Abstract: Disclosed is an improved indicator, which includes a scale plate having a pointer rotatably mounted thereon; an ultraviolet light source for illuminating said scale plate; and indicia arranged on the scale plate for indicating a specific value in cooperation with the pointer, each of the indicia including first and second parts, and in which the second part includes fluorescent brightener therein so as to be illuminated when the ultraviolet light source is turned on. When the ultraviolet light source is turned on, particularly at night, the second parts of the indicia will become visible so that the visibility of the indicia is changed from the daylight condition in which the light source is turned off. Namely, an interesting design change of the indicia of the indicator can be obtained.

Abstract: A viscous fluid coupling apparatus includes a shaft, a rotor, and a housing. The housing has a separator plate and a partition wall. The separator plate divides an inside of the housing into a reservoir chamber and an actuator chamber having a torque transmitter portion, and it has a communication hole communicating the reservoir chamber with the actuator chamber and a pump protrusion for transferring the viscous fluid in the reservoir chamber to the actuator chamber via the communication hole. The partition wall divides the reservoir chamber into an inner peripheral reservoir chamber communicated to the actuator chamber and an outer peripheral reservoir chamber communicated to the actuator chamber. Viscous fluid is pumped from the actuator chamber to the inner peripheral chamber by the pump hole, the pump protrusion and the communication hole, and less of the viscous fluid remains less in the actuator chamber when an engine is stopped. Therefore, less induced rotation occurs.

Abstract: A viscous fluid coupling has a rotor including peripheral teeth with distal ends closely facing an inside surface of an output member. The distal ends of the teeth form flat surfaces parallel with the output member to form a rotary seal therewith, which reduces variations in the rotational speed of the output member.

Abstract: A cylindrically-shaped engine cooler for automobiles comprises a pair of water tanks or main coolant tubes, a plurality of water tubes connecting the water tanks or main coolant tubes, a plurality of cooling fins and at least one cooling fans. The cylindrical engine cooler is disposed in a vehicle so that the axis line of the cooler crosses the traveling line of a vehicle so that the air resistance against vehicle travel becomes small. The water tanks or main coolant tube can be used as the shroud for accommodating the cooling fan, when they are annularly shaped and disposed at the end of the cylindrically cooler. Two cooling fans disposed at the both ends of the cylindrically-shaped cooler may have different air-blowing capacity each other.

Abstract: A viscous fluid coupling for use with a fan that cools as automobile engine includes a rotor driven by the engine. The rotor is housed in a housing formed by a case and a cover. A rear plate is mounted on the inner surface of the case and has an orifice. A front plate is mounted on the inner surface of the cover and has a hole through which viscous fluid can flow. A first reservoir is formed by the cover and the front plate. A second reservoir is formed by the rear plate and the case. Teeth are formed on the outer surface of the rotor. A protrusion is formed on the outer periphery of the rotor near the orifice.

Abstract: In a viscous fluid coupling which is essentially composed by one rotor, the other rotor, a first oil storage chamber and a valve, the one rotor fixed to an input member and the other rotor fixed to an output member are combined to form an operation chamber. The first oil storage chamber is formed between the other rotor and the output member, and the valve opens and closes a port of an oil passage which communicates the first oil storage chamber with the operation chamber under control of a temperature sensitive member attached to the output member. In this construction a case fixed to the output member covers a side surface opposite to the rotors. A second oil storage member is disposed in a position corresponding to the first oil storage chamber between one rotor and the case. With this arrangement, a so-called taking-around phenomenon which is present when the operation of the viscous fluid coupling resumes can be eliminated.

Abstract: A temperature responsive fluid coupling device which can precisely control the transmitting torque between an input coupling member driven and an output coupling member in three steps in response to changes of ambient temperature of the output coupling member. The fluid coupling device includes two labyrinth operating chambers functioning as a torque transmitting mechanism, and each operating chamber includes a fluid return opening and a pumping mechanism.

Abstract: A method for producing an inorganic porous shaped product comprising the steps of mixing silica dust with water, shaping the mixture, drying the shaped product to adjust the water content thereof to 1 to 10 weight percent and thereafter firing the shaped product at a temperature of 1,000.degree. to 1,450.degree. C, said silica dust being:(i) a by-product from the process of producing ferrosilicon by electrothermal metallurgy, and(ii) 0.1 to 1.0 .mu. in particle size, 10 to 50 m.sup.2 /g in specific surface area and about 0.1 to about 0.3 g/cm.sup.3 in bulk density,And comprising 85 to 98 weight percent of amorphous silica, 0.2 to 2.0 weight percent of FeO, 0.2 to 5.0 weight percent of Al.sub.2 O.sub.3, 0.5 to 2.0 weight percent of MnO, 0 to 0.1 weight percent of CaO, 0.5 to 5.0 weight percent of MgO and 0.1 to 1.5 weight percent of others.