Abstract: In a cylindrical cutter head tool including a shaft part with a head support platform and a cutter head disposed on the cutter head support platform, the cutter head support platform and the shaft are an integral part made of tool steel and the cutter head is a sintered hard metal body, and the cutter head support platform and the cutter head include cooperating form-locking elements by which the cutter head is centered on the cutter head support platform and rotationally firmly engaged therewith.

Abstract: In a composite lightweight valve for internal combustion engines having a solid valve head provided with a center opening and a valve stem received in the center opening of the valve head in a positively locking manner, the valve components are permanently joined to one another by hot upsetting so as to be capable of withstanding the thermal and mechanical effective during engine operation.

Abstract: In a front end forklift truck having an undercarriage with a load lifting unit disposed at its front end and a rear box structure with drive components disposed at its rear end, an operator seat unit is mounted on a pivot column disposed in front of the rear box structure and includes an operator seat projecting rearwardly from the column over the box structure. A footrest and pedal structure extend forwardly from the bottom area of the column for pivotal movement therewith. Steering and control members for steering the forklift truck and for controlling the load lifting unit are mounted to the pivotable operator seat.

Abstract: In a passenger seat support arrangement for a people mover comprising a seat portion and a seat portion support structure including a transverse beam on which the seat portion is supported, the transverse beam has, in its top side adjacent the seat portion, at least one recess which extends into the transverse beam and has a sidewardly extending undercut with an inclined top wall having at the base of the undercut a greater distance from the top side of the transverse beam than at its entrance, and the seat portion has at least one projection extending into the recess and having a bent-over end shaped so as to be snugly received in the undercut for firmly holding the seat portion in engagement with the transverse beam.

Abstract: In a shaft-type cutter body of hard material including a shaft for mounting the cutter in a chuck and a head including cutting areas with cutting edges disposed around the circumference of the head, the shaft and the head are formed integrally by injection die casting of powdered raw material followed by sintering. The unfinished cutter body includes cutting edge sections with recessed areas adjacent the cutting edge front surface area for receiving wood chips and delimiting the cutting edge surface area and a surface area receding radially inwardly from the rear cutting edge surface area of the cutting edge so as to limit the rear cutting edge surface area.

Abstract: In an internal combustion engine with an engine block, a cylinder head mounted onto the engine block, a cylinder head gasket disposed between the engine block and the cylinder head, a piston disposed in a cylinder formed in the engine block and a cylindrical ring arranged in a recessed area between the piston and a cylinder area around the top land of the piston in the top dead center position of the piston, the cylindrical ring is formed as part of the cylinder head gasket.

Abstract: In a fuel injection arrangement for a multi-cylinder internal combustion engine including an engine block with a cylinder head defining combustion chambers and a cylinder head cover wherein the cylinder head has cavities receiving fuel injectors which extend downwardly into the combustion chamber for injecting fuel and upwardly into recesses formed in the side wall of the cylinder head, a fuel distribution rail extends over, and is connected to, the fuel injectors, and the cylinder head cover has an extension projecting sidewardly over the fuel injectors and the fuel distribution rail so as to form a protective shield.

Abstract: In a method of producing a self-focusing reflection grating structure for the series manufacture of microspectrometers including flexible foil strips provided with a grating structure and supported in a microspectrometer housing, a foil is first mounted onto a support member of an ultraprecision turning lathe on which circumferential parallel grooves are cut into the foil by microforming diamonds providing a saw-tooth pattern of annular teeth with predetermined tooth spacing, the foil is then cut into a plurality of foil strips and the strips are bent into a curved shape providing a focusing reflection grating structure.

Abstract: In an arrangement for mounting a fuel tank to the undercarriage of a motor vehicle by way of a support bracket and a tension strap extending around the fuel tank, the support bracket includes means engaging one end of the tension strap while the other end of the tension strap forms a loop portion with a bore and a connecting member having one end with a threaded shaft extends through the bore and through a transverse connecting member for engagement with the loop and the other end of the shaft has a hook-like head hooked into an eyelet in the bracket. A nut is threaded onto the threaded end of the shaft for tightening the tension strap and holding the fuel tank in firm engagement with the bracket.

Abstract: In an arrangement for joining tubular duct sections, especially the end sections of pipes of a motor vehicle exhaust system, wherein the end sections are received in one another such that one end section extends around the other in spaced relationship with a seal structure disposed therebetween, the one end section has slots and a spring structure is inserted through the slots into the space between the pipe end sections and has spring legs disposed in the space between the pipe end sections in engagement with the pipe end sections for holding them in firm axial engagement with each other and with the seal structure disposed between the pipe end sections.

Abstract: In an internal combustion engine with an exhaust gas turbocharger having an exhaust gas turbine arranged in an engine exhaust pipe upstream of a catalytic converter and a bypass line branching off the exhaust pipe upstream of the exhaust gas turbine and rejoining the exhaust pipe between the exhaust gas turbine and the catalytic converter, a bypass valve is provided which is so controlled that, after startup of the internal combustion engine, the bypass valve is, during a catalytic converter heat-up period, at least partially opened when the internal combustion engine load is below a predetermined value and is only closed when the engine load is above the predetermined value.

Abstract: In a superconducting short circuit current limiter for an AC power supply net including an iron core, a primary coil and a secondary short-circuited superconductive coil, both being magnetically coupled with the iron core but being arranged at a distance from each other, the iron core has gaps at opposite sides of the secondary coil for thermically uncoupling the secondary coil from the rest of the magnetic core and a tertiary coil is arranged closely adjacent the primary coil in a magnetically strongly coupled relationship therewith, and has a heat capacity sufficient to accommodate the joulean heat generated when a fault or short circuit occurs in the power supply net, and the iron core has an area of reduced cross-section which is so selected that it becomes magnetic flux saturated when the current in the primary coil exceeds a predetermined reaction current level.

Abstract: In a 3D video endoscope, two lenses are disposed at the front end of a shank portion at a certain squint angle providing for two separate beam paths in each of which an optical switch is disposed and the switches are so controlled that they are alternately transparent and opaque, one being transparent, while the other is opaque, and a beam deflection arrangement is disposed in the beam paths for directing the beams along a single axis into an opto-electronic camera which provides electrical output signals representing alternately the pictures generated by the two front lenses.

Abstract: In an engine brake for a multicylinder Diesel engine having a cylinder head with at least one exhaust or decompression valve for each cylinder for controlling the discharge of gases from the cylinder, a high pressure fuel injection system with a common fuel supply line for distributing fuel under pressure to the various cylinders and with at least one camshaft-operated plug-in fuel pump for supplying fuel under pressure to the common fuel supply line, an engine brake actuating system is provided which includes, for every two cylinders operating at a 360.degree. crankshaft phase difference, a plug-in pump which concurrently operates the exhaust or decompression valves of the associated two cylinders, one at the end of its compression stroke and the other at the end of its exhaust stroke.

Abstract: In a control for an automatic clutch disposed between the engine and the drive train of a vehicle for controlling the vehicle movement at start or during transitional phases, the clutch is controlled in such a way that, with a predetermined low engine speed, movement of the vehicle at a predetermined creeping speed is obtained.

Abstract: In a valve control for an internal combustion engine, particularly an exhaust gas recirculation valve comprising a valve with a valve stem and a valve disc axially movably supported in a housing for moving the valve disc out of, and into, seating engagement with a valve seat for opening and closing a gas flow passage, a rotary magnet structure with a motion transmitting mechanism is provided with an actuator arrangement for converting rotation of the rotary magnet to axial motion of the valve member by way of a cam track structure disposed between means rotating with the rotary magnet arrangement and a valve guide supporting the valve for only axial movement from and onto the valve seat.