Abstract: A rocker arm and method of making same are provided. The rocker arm is of the cam-follower type and includes a metal body preferably made from a stamped metal piece and a stamped metal strip. A rounded recess is formed at one end portion of the metal piece and facing away from the metal strip to receive a lifter post having an end on which the rocker arm can pivot. The metal piece also has an additional recess at another end portion to receive an end of a valve stem and the metal strip has an intermediate convex portion facing away from the metal piece. The metal piece has a hole extending therethrough and communicating with the rounded recess, while the strip forms an oil passage communicating with the hole and extending toward the convex portion to supply lubricating fluid between the convex portion and the rounded recess. The convex portion has a shallow recess in which is received a hardened metal insert to be engaged by a cam.

Abstract: Disclosed is an improved hydraulic lash adjustor in a valve operating mechanism for automatically eliminating valve head clearance of the type which includes a cylinder, a plunger slidably fitted into the cylinder and a check valve accommodated in a valve cage secured to the bottom portion of the plunger, said check valve being adapted to control communication between a hydraulic chamber defined below the plunger and a hydraulic oil reservoir chamber formed in the plunger in dependence on operation of an engine. A flange portion of the valve cage is firmly held in position between the bottom portion of the plunger and a caulking ring fitted into an annular engagement groove formed on the plunger. The annular engagement groove has upper and lower side wall surfaces and at least the lower side wall surface is formed as a tapered face which extends radially inward at a downward inclination angle.

Abstract: A valve (10) for a water temperature control system having a heat exchanger (C), a tank (T), and a pump (P) for circulating heat transfer fluid through a supply line (11, 12, 13) from the tank to the heat exchanger and through a return line (14, 15) from the heat exchanger to the tank including a valve housing (20) interposed in both the supply line and the return line having supply inlet and supply outlet connections (24, 25), having return inlet and return outlet connections (26, 28), and having first and second drain connections (29), a valve element (45) associated with the valve housing having a first position for normally circulating the heat transfer fluid from the supply inlet connection to the supply outlet connection and from the return inlet connection to the return outlet connection and having a second position discontinuing circulation through the supply inlet connection and the return outlet connection and connecting the supply outlet connection to the first drain connection and the return outle

Abstract: Disclosed is heat exchange apparatus for controlling the temperature of a resin after leaving an extruder and prior to extrusion through a die in an extrusion process, comprising a heat exchanger having an inlet and outlet for an extruded heat-plastified resin and an inlet and an outlet for a heat exchange medium to be circulated in heat exchanging relationship with the extruded resin; a selective heater for receiving the heat exchange medium from the heat exchanger, the heater heating the heat exchange medium to a predetermined temperature during a start-up phase of the heat exchange device; a cooler adapted for receiving a portion of the heat exchange medium from the heater, the cooler including an inlet and an outlet for the heat exchange medium and an inlet and an outlet for a cooling medium to be circulated in heat exchanging relationship with the heat exchange medium; control means interposed between the heater and the cooler for selectively directing a portion of the heat exchange medium to said cooler

Abstract: A heat exchanger having a flat tube with a plurality of fluid passageways therein, header pipes connected to opposite ends of the flat tube and inlet and outlet tubes connected to the header pipes, respectively. The inlet and outlet tubes are inserted and fitted into the corresponding ones of the header pipes and formed with axial slits in the inserted end portions. The opposite ends of the flat tube extend into header pipes through axial slits in the outer surfaces thereof and are fitted into the axial slits of the inlet and outlet tubes inserted therein. Thus, the inlet tube and the outlet tube are reliably maintained in their desired orientation. The header pipes are made of aluminum brazing sheet and, therefore, are brazed to the aluminum flat tube and the inlet and outlet aluminum tubes.

Abstract: A cast steel stave cooler comprising a carbon steel cooling pipe having a roughened surface and having a coating thereon, and a cast steel embedding the cooling pipe therein. The cast steel contains 10 to 25% Cr and has a very reduced liquid-solid zone so as to prevent fusion of the cooling pipe during the casting. The cooling pipe is provided with fins which are integratedly welded to the cast steel.

Abstract: This invention is directed to a novel camshaft for engine timing. The cam positions of the camshaft include secondary lobes in conjunction with normal primary lobes. The secondary lobes are positioned so that they precede their associated primary lobe during camshaft rotation. The secondary lobes cause an associated valve to open slightly and close completely prior to the normally expected valve opening caused by the primary lobe. This slight opening and closing creates a shock wave that aids the atomizing air and fuel mixing in the intake system prior to normal intake valve opening and enhances the scavenging of combustion gases during the exhaust cycle.

Abstract: A three fluid heat exchanger in which first and second fluids are in a normally flowing heat transfer relation, with flow of a third fluid being dependent on a changing condition of one of the first or second fluids. Tubular heat exchanger cores are comprised in a unitary body with one being perpendicular to the other for space conservation and to simplify fluid flow patterns. The described one core is in the path of flow of one of the first or second fluids and provides a flow path for the third fluid. A valve influenced by a changing condition of one of the first and second fluids controls flow of the third fluid.

Abstract: A heat exchange device for transferring heat from a first medium to a second medium. The device includes a first chamber through which the first medium passes, a second chamber through which the second medium passes, the second chamber having a common boundary with at least a portion of the first chamber, and guide structure for causing the second medium to move in a spiral path through the second chamber and over the common boundary between the first and second chambers.

Abstract: Exhaust gas purifying method and apparatus for internal combustion engines in which the temperature of an exhaust gas purifying catalyst is detected and, as desired, oxygen content of exhaust gas is further detected, and in which the actual air-fuel ratio is varied toward the higher air-fuel ratio side and the lower air-fuel ratio side with respect to the theoretical air-fuel ratio, in accordance with the frequency and amplitude preset dependent on the kind of the catalyst and set based on these measured values.

Abstract: A heat exchanger for exchanging heat between incoming cold fresh air and outgoing warm exhaust air. The heat exchanger is constructed of a number of relatively long flexible plastic tubes supported within a flexible plastic outer housing. The inner tubes are supported in spaced-apart relationship within the outer housing. A manifold on each end of the tubes in sealing engagement with the inner tubes and with the housing so that air can be forced through the inner tubes in one direction and through the housing in the other direction. The diameters of the inner tubes and outer housing being large enough so that blockage by ice or frost is minimized.

Abstract: An internal combustion engine has n member of cylinders, a piston in each cylinder connected to a crankshaft (2), each piston being in phase or out of phase with the others by A.degree. or a multiple thereof (A=720/n), cams for actuating inlet and exhaust valves to each cylinder, and a cam drive mechanism (5) which rotates the cams in phased relationship with the crankshaft (2) to open the valves in sequence for a desired angle of rotation of the crankshaft. The cam drive mechanism also includes means for combining the rotational movement of the cams with a phased oscillatory movement of the camshaft (3) and cams of variable amplitude about the axis of rotation at a frequency f times the crankshaft frequency so that over the period which the valves are opened and/or their timings variable, f has the following values:f=2n when the number of cylinders n=1;f=n or n/2 when n=2;and f=n/2 when n=3 or more. The selection of the frequency of the oscillations allows all the cams to be mounted on the same camshaft.

Abstract: A heat exchanger of a construction having a plurality of plates disposed in mutual confrontation at a predetermined spaced interval among them to separate two fluids to be subjected to heat-exchange; a fin disposed in the space interval among the mutually opposed plates to form a plurality of parallel flow paths for controlling flow of the two fluids in the spaced interval, the spaced interval formed by the plates being in a plurality of stacked layers, and the portion where the fin is present and the empty space where no fin is present being so disposed in the plurality of space intervals in layer form that they may be staggered in the direction of stacking the plates; and a control member provided in each of the space intervals in layer form to separate and alternately lead into each space interval the primary fluid and the secondary fluid so as to effect the heat exchanging operation between the primary fluid and the secondary fluid in the course of their passage through the spaced interval in layer, while

Abstract: An engine valve timing control system using electrohydraulic valve lifters or adjusters operatively connected to a microprocessor based electronic control unit will provide real time charges in engine valve timing. As a result, engine performance will be improved over the mechanically controlled engine valves which at best are compromises between engine operating extremes. Each lifter is "homed" to the base circle of the cam through the use of check valves and high pressure pulses generated in the oil lines supplying the lifters.

Abstract: A transport unit for elongated hot metallic stock, includes a roll or roller having a cooling duct system near its periphery and radially oriented feed and discharge ducts for coolant; a journal pin extends from the roll or roller to one axial end thereof and carrying a gear, the journal pin is traversed by a bore extending into the interior of the roll or roller and is fluid conductively communicating with the coolant discharge duct; a gear transmission including a casing is provided and the journal pin is mounted for rotation by means of roller bearings in the casing, the transmission gear includes the gear on the journal pin so that the journal pin constitutes the output shaft of the transmission gear: a motor is secured to the casing and has its output shaft drivingly connected to the input shaft of the transmission gear; a feed tube for coolant extends through the bore and into the roller for fluid conductive connection with the radial feed duct and being connected to a coolant feed supply; additional co

Abstract: A hydraulic circuit system for civil engineering and architectural machinery having at least first and second hydraulic pumps, a plurality of actuators driven by hydraulic fluid from said pumps, and a plurality of directional control valves for controlling the direction and flow rate of the hydraulic fluid supplied from the pumps to the actuators. In the directional control valves, a first boom directional control valve and one of right and left travelling directional control valves are connected to the first pump in parallel with each other, a swing directional control valve, an arm directional control valve and a second boom directional control valve are connected to the second pump in parallel with one another, and the other of the right and left travelling directional control valve is connected in tandem to the swing, arm and second boom directional control valves at a location downstream thereof.

Abstract: A collar member disposed about a drain bore in the radiator. A drain cock is received within the collar member and has a portion which enters the drain hose is fixed to a drain bore of the radiator and seals the drain bore when tightened. An axial groove in the drain cock places the interior of the radiator in communication with a chamber within the collar when the drain cock is loosened, so that fluid may be drained from the radiator through the chamber and the drain hose. A hose holder is connected to a fan shroud to hold a portion of the drain hose in place.

Abstract: A water jacket in the turbo-charger is positioned at the same level or higher than a water jacket in an engine cylinder head. The turbo-charger cooling water circulation passageway includes a water volume or tank positioned at a level higher than the turbo-charger cooling portion, and the volume or tank is connected to a cooling water reservoir tank via a pressure relief valve which is opened when pressure in the volume or tank exceeds a predetermined value to supply cooling water to the volume or tank.

Abstract: The disclosed invention relates to a counterflow type heat exchanger composed of plural heat exchange units characterized by unique inlet and outlet headers. Each header has an end face providing an opening to the header interior and a closed end face, both of which extend obliquely from the tube sheet to join at an apex and which are symmetrically arranged with respect to each other. Such a construction enables the flow of fluid passing through each heat exchange unit to be uniform across the width of the heat exchange unit.

Abstract: A plate and fin type heat exchanger in which different flowing fluids are placed in a segregated heat transfer relation and in which provision is made to deny opportunity for a leaked fluid from one flow or circuit to join or mix with fluid of another flow or circuit. A concept of vented buffer zones is used to protect against leakage through plate elements and through defined joints between plate and spacer elements. The concept allows and provides for relatively simple manifolding and for fabrication to conventional configurations using for the most part standard easily manufactured parts.