Abstract: A twin motor fan unit is provided with two fan members mounted to parallel rotational shafts of a motor. The motor fan unit includes a rectifying plate to partition the fan members. The rectifying plate prevents turbulence at the rear faces of the respective fans that would otherwise be caused by mutual interference of the air stream leaving the fan. As a result, the motor fan unit enables an increased quantity of air to flow through the motor fan unit and also achieves a reduction in operating noise.

Abstract: Herein disclosed is a flared structure which forms one open end of a metal pipe to be connected to one end of a mating joint. The flared structure has at least one deformed elastic wall portion which is formed circumferentially in the vicinity of the open end of the metal pipe. As the open end is clamped and fastened at the connecting time, the deformed elastic wall portion establishes an elastic force for ensuring a stable connection for a long time.

Abstract: A clamp body is provided for fixing a small diameter pipe to a base. The pipe has first and second straight portions and a bend therebetween. The clamp body is formed from a unitary member having first and second opposed ends and a fitting wall therebetween. The fitting wall has an aperture for mounting the clamp body to the base. First and second extension walls extends from the fitting wall toward the ends. Seizing walls are defined on the respective extension walls. Each seizing wall is bent through more than 180.degree. for fixedly embracing the respective straight pipe portions relative to the base. At least one of the extension walls is angularly bent relative to the fitting wall at a location spaced from the pipe.

Abstract: A steel product (or copper-plated steel product) with heat-resistant, corrosion-resistant plating layers which are composed of a 0.2-10 .mu.m thick nickel plating layer formed on said steel product, a zinc plating layer formed on said nickel plating layer, and a chromate film formed on said zinc plating layer.

Abstract: An axial-flow fan to be attached to an output shaft of an internal combustion engine is provided with a circular resistance plate disposed between the fan and the engine housing. The resistance plate extends perpendicularly to a fan driving output shaft of the engine, while surrounding the output shaft. Air flow flowing against the resistance plate is deflected in the radial directions, deviating from the output shaft. This air flow turns back toward the upstream side of the fan, turbulent flow is effectively minimized, and the absorption power of the fan is remarkably reduced.

Abstract: A fan coupling device controls the transfer of torque from a rotating shaft to a closed housing having an oil basin chamber and a torque transfer chamber by varying the effective contact area of oil in a torque transfer gap defined between a driving disc secured to the rotating shaft and the inner wall surface of the closed housing. To incorporate a sub pumping function, a sub dam member is attached to the inner circumferential surface of the closed housing, a sub circulatory passage is formed which leads from around the sub dam member inside the torque transfer chamber to the oil basin chamber, and a temperature-sensitive valve element is provided inside the oil basin chamber to open and close the outlet port of the sub circulatory passage in accordance with the internal temperature of the closed housing.

Abstract: An Otto-cycle engine in which the expansion ratio is set in the range 11:1 to 16:1, comparable to the expansion ratios of Diesel engines and which has a rotary valve mounted in the suction passage. The valve is equipped with a valve actuating timing-adjusting device. The valve is closed prior to the bottom dead centre of each induction stroke to set the expansion ratio higher than the compression ratio set under full load conditions. The engine further includes a knock sensor for sensing or forecasting knocking. Valve closure is advanced by the adjusting device in response to the output signal from the sensor to adjust the compression ratio of the engine.

Abstract: An axial flow fan has each of its fan blades provided with an integrally formed centrifugal element which extends substantially parallel to an imaginary plane containing a central axis of the fan. Some of the air flow passing through the fan collides against the centrifugal elements, which deflect the air in the radial directions. A disk-like air barrier is thus formed around the fan blades, whereby a countercurrent flow and circulation flow are eliminated. The fan efficiency is also improved.

Abstract: A fluid pipe assembly comprises a block, and a discrete eye joint. The block has a rear wall defining a mounting surface adapted to be mounted to a base, and a side wall defining a recess. The block includes mounting holes extending therethrough, and a passage extending from the recess and terminating at the mounting surface. The eye joint includes a generally spherical wall defining an axial hole, and a short cylindrical wall extending from the generally spherical wall and communicated with the axial hole. The short cylindrical wall of the eye joint is brazed to the recess of the block to form a joint. A pipe includes a cylindrical wall in which an opening is formed. The pipe extendes through the axial hole of the eye joint so that the opening may be aligned with the short cylindrical wall. The pipe is brazed to the peripheral edges of the axial hole of the eye joint.

Abstract: The piping connector according to the present invention is comprised of a conducting pipe having an annular expanded wall in the proximity of an end part of the pipe, a main body of a joint provided with a structure formed at one end thereof for accepting the conducting pipe thereinto and provided with a circulating hole formed in the axial direction on the other end part thereof in communication with the conducting pipe mentioned above, a sealing means to be fit into the inside area of the main body of the joint, and a retaining means installed inside the main body of the joint, wherein the retaining means mentioned above is comprised of an arm part formed of an elastic body in a shape resembling that of the letter C, and a socket unit comprised of a plurality of suspending parts projecting from the arm part in the direction of the inside diameter and inserted into notched windows formed in the main body of the joint and disposed so as to be put into their direct contact with the annular expanded wall of the

Abstract: A manufacturing process of an offset-type fuel delivery rail assembly for an internal combustion engine. The offset-type assembly features offset distances between an axial centerline of an elongated conduit and those of tubular sockets for receiving fuel injectors. The process comprises the steps of clamping a conduit with a chucking tool, lowering a cutting blade onto the conduit to form arcuate edges corresponding to outside curvatures of tubular sockets, attaching the tubular sockets to the arcuate edges of the conduit by spot welding, and then brazing or welding around the arcuate edges to form an integral assembly. The cutting blade is formed into a solid circular configuration having an oblique plane. The cutting blade may be provided with a pair of longitudinal slots in order to form projections for concentrating electrical current during spot welding.

Abstract: A temperature-controlled fluid coupling for intermittently driving a cooling fan of an internal combustion engine. The coupling comprises a drive input shaft having a rotor thereon, a housing for supporting a cooling fan, a plurality of radial vanes accommodated within the rotor, and a valve member within the housing. The vanes are movable in radial directions within an elliptic chamber in the housing. The rotor and the vanes provide a kind of vane pump system. A temperature sensitive element is disposed outside of the housing and connected to the valve member. The element operates to open and close the valve in response to a change of ambient temperature. The fan rotates to cool the engine only when the temperature goes up to a predetermined level.

Abstract: A method of applying various kinds of bending working accurately to a metal tube of a small diameter to be worked, which comprises seizing one end of a metal tube to be worked and setting a working direction, transferring the tube to a working position, applying predetermined bending by paired roller means, transferring the same to the succeeding step and applying the same working. Such operations are repeated as required. The apparatus employed for practicing the method comprises a chuck, a receiving roller and a bending roller and a control means for controlling the operation of them. Various kinds of bending working can be applied efficiently and accurately to a metal tube of a small diameter to be worked by a simple method and with an apparatus of a simple structure.

Abstract: Herein disclosed is a piping/wiring clamping device which has a simple structure but can fix a piping/wiring element stably while allowing a tentative fixing. The clamping device comprises: a clamping wall formed by curing a band generally at its center for clamping at least one piping/wiring element fixedly; a pair of mounting walls which are formed to extend continuously from the two ends of the clamping wall and at least one of which is arcuated; engaging means formed at the extending end portions of the mounting walls for engaging with each other at their ends when the two extending end portions are pressed toward each other; and mounting holes individually formed in the mounting walls and adapted to overlap each other when the mounting walls are held in contact with each other.

Abstract: A radiator cooling apparatus for an automotive internal combustion engine is provided. The apparatus comprises an air suction duct or air injection duct connected to a closed-type blower. The suction duct draws ambient air through the core of the radiator and cools the hot water in the core. The injection duct injects ambient air toward the core and cools the hot water in the core. On the active surface of the duct, a plurality of bellmouths or nozzles are formed. The existing fan is removed from the engine, whereby fan noise is eliminated.

Abstract: A joint for coupling small-diameter pipes, comprises a body including a cylindrical joint wall having a bore, and a cylindrical wall defining a stepped enlarged chamber in communication with the bore and receiving seals and a bushing behind the seals, the cylindrical wall having a rear end extending outwardly to provide a flange, and the bushing having an open end, a collar having a rear end extending inwardly to provide a locking wall and a front end extending inwardly to provide a engagement wall engaged with the flange, and a plurality of resilient retainer each having one end engaged with the open end of the bushing and the other end bent to a V-shape to provide a pawl. When coupling is effected, a bent portion of the retainer is brought into engagement with the locking wall, and the pawl is brought into engagement with an annular projection wall formed on one end of a pipe inserted into the enlarged chamber.

Abstract: In causing a pressure head portion on the terminal of a branch pipe to be abutted and tightly pressed against a pressure receiving bearing surface formed in a through hole in a high-pressure fuel rail, the pressure bearing surface is formed in the shape of a spherical surface having a curvature radius (.gamma.) of 0.4D to 10D, wherein D is the diameter of the branch pipe. Since the branch pipe has such a spherical pressure bearing surface, a uniform surface pressure can be obtained should the branch pipe be installed in an inclined state, and such an inclination or eccentricity can be rectified by the shapes of the pressure receiving bearing surface and the pressure bearing surface to provide a uniform surface pressure.

Abstract: A connector device for connecting a small diameter pipe is disclosed. The device has a joint body internally formed with a communication bore, first and second pipes intruded into end parts of the joint body, a socket member having elastic pawl walls each impinging on an annular swelling, and sealing members internally provided. The second pipe is movable a given distance in the axial core direction.

Abstract: Herein disclosed is a pipe fixing structure using a clamp member, which comprises: clamp means including a band-shaped plate member having wall portions opposed to each other and a plurality of projections on its inner periphery; a plurality of pipes each having a cylindrical member of heat-shrinkable resin fixed on its outer circumference in registration with the projections and adapted to be clamped by the clamp means; and fastening means for fastening the band-shaped plate member in a direction to bring the opposed wall portions toward each other so as to cause the projection to bite into the cylindrical members.

Abstract: A branch connection for a high pressure fuel rail including a passage through which high pressure fuel flows, and a plurality of through holes formed in the circumferential wall of the passage and including respective pressure receiving surfaces tapering radially outwardly from the passage. The branch connection comprises a branch element including a passage communicated with the passage of the fuel rail. The branch element includes a press head, at one end, engaged with the pressure receiving surface through a bowl-shaped seal so as to threadably secure the branch element to the fuel rail. The seal has a central hole, at least inner and outer peripheral edges of which are engaged with an end surface of the press head and the pressure receiving surface of the through hole in the fuel rail, respectively. The angle between the peripheral surface of the central hole in the seal and the pressure receiving surface is less than 90.degree..