Abstract: Two-stage classification of a granular material, in particular a cement grinding feed, is accomplished in two classifiers connected in series in such a way that the separative behavior or the separative action and thus the particle-size distribution of the undersized or finished material coming from the second classifier can be modified with simple resources. Part or all of the oversized material of the second classifier is recycled to the second classifier.

Abstract: A conveyor crossover has a pivotable ramp which is moved from a horizontal bridging position across a conveyor to an upright position is which it is out of the way of material being moved by the conveyor. The ramp is raised and lowered by a control system which includes a pair of fluid actuators controlling pivotal movement of the ramp together with controls at both sides of the conveyor for adjusting a control valve controlling flow of fluid to and from the actuators. A latch mechanism is provided to hold the ramp in its raised position.

Abstract: A drive-through work station with power operated tarping equipment is provided to efficiently and safely apply tarpaulin covers to payloads on flatbed highway trailers. The work station may include a work platform at one or both sides of the trailer being tarped.

Abstract: Electrical contact mat (2) with at least two plates (2a, 2b) arranged at a spacing from each other in the at-rest condition, which plates are fabricated in particular from rubber or polymers and made electrically conductive by the admixture of conductive substances such as carbon black, graphite, metal powder and the like, the spacing being established by one or more nonconductive spacers, and with a device for closed-circuit protection, which is operatively connected with the plates (2a, 2b), the spacers being designed as a substantially inelastic interlayer (2c), which has openings of such size that the inner surfaces of the plates (2a, 2b) make mutual contact when the contact mat (2) is under compressive load and thus form the switch of a tactile sensor (1) of the device for closed-circuit protection, the sensor (1) having an electrical connection (3) in parallel with the contact mat (2).

Abstract: A three point tractor hitch permitting an implement to be attached or detached by an operator without leaving the tractor seat. The upper hitch arm includes a linear actuator with a hand grip and a hand operated switch controlling extension and contraction of the upper arm. A latching mechanism and a hand operated latch release are mounted on the upper arm facilitating attachment and release of the upper arm to an upper attaching pin of an implement hitch mast. One of the two lower arms of the hitch can be shifted laterally by a hydraulically actuated cylinder.

Abstract: A method for the fabrication of concrete blocks (2) or concrete slabs of various forms and sizes, fabrication taking place on the basis of vibrational compaction in concrete-filled molds or dies, the block surface or slab surface of the concrete blocks or concrete slabs being subjected to at least one post-forming treatment and subsequent curing. The post-forming treatment includes gentle contact of the surfaces of the concrete blocks or concrete slabs with soft materials.

Abstract: Cement clinker production apparatus having a precalcination stage connected upstream of a rotary kiln, in which precalcination stage a CO-containing reduction zone in the rotary kiln off-gas duct is employed for the purpose of reducing the pollutant NOx. In order to make certain that the quantitative ratio of O2 in the rotary kiln off-gas to fuel admitted by a deNOx burner, and thus control the effectiveness of NOx reduction, a pivoting throttle valve (33) is positioned in the precalcination stage to control the quantity of rotary kiln off-gas and thus the O2 content in the kiln off-gas. The throttle valve (33) is positioned in the rotary kiln off-gas duct (15) above the deNOx burner (19), above the raw meal inlet (13), and before the confluence of the tertiary air substream with the rotary kiln off gas.

Abstract: A shoe bearing for a heavy rotary drum such as a cylindrical casing of a tube mill designed so that all the shoe bearing elements used at each bearing station are always uniformly loaded. One of the two outlying shoe bearing elements (11) is braced directly against the foundation (16) while the other shoe bearing elements (12, 13, 14) of the bearing station are supported on a flexible support cable (17).

Abstract: A system for the manufacture of cement clinker from cement raw meal in which the off-gases of the cement clinker production line not only undergo denitrification but also undergo desulfurization, so that even sulfur-rich raw materials and fuels can be employed without exceeding the prevailing pollutant emission limits. A substream of the oversize material (30) discharged from the mixing chamber (29) of the precalcination stage (16) as solid sorbent may be combined with the off-gas (22) and/or with a partial gas discharge (38) of the rotary kiln off-gas in order to convert the sulfur oxides contained in those off-gases to calcium sulfate (34), which is subsequently separated from the system off-gas.

Abstract: The coolant circuit downstream of the coolant pump 1 of an internal combustion engine is divided into a) an engine cooling loop (I) through the internal combustion engine (2) with a crankcase and a cylinder head, b) an exhaust loop (II) with an exhaust manifold (3) and a turbocharger (4) and c) a heat exchanger loop (III) with a charge heat exchanger (9) and a raw water heat exchanger (8) in a parallel configuration. These loops are recombined upstream of the coolant pump (1).

Abstract: A safety contact or switch hose having a plurality of electrically conductive projections which generate a switching pulse when coming into contact with one another.

Abstract: A catheter electrode shell (2) has cutouts (3) made in such a way that a closed circular ring (4) is preserved to secure the electrode shell (2) to the catheter tube. The remaining contact surface (5) is arranged on the outside of the catheter curvature in the case of pre-bent or guided catheters.

Abstract: A mobile human life unit includes an elevatable platform supported by a ladder mounted on a wheeled vehicle. A first embodiment of the mobile human lift unit utilizes a winch with a winch cable reeved over a pulley carried by a support having at least three legs which are held in fixed positions on the platform. A second embodiment of the mobile human lift unit has an overhead crane with a track which swings about a vertical pivot axis and carries a trolley with a winch.

Abstract: A bulk unloading station is formed by two elongated modules stacked one on top of the other. Each module has a frame with pillars and when the upper module is stacked on the lower module the pillars on the upper module align with the pillars on the lower module. The modules are sized for shipment by truck or railroad car to the bulk unloading site. The lower module contains fluid transfer equipment. Unloading arms, with fluid conduits connectable to a fluid containing vehicle at one lateral side of the station, are mounted on the upper module. Conduits extending between the lower module and the upper module include removable segments at the juncture of the modules.

Abstract: The invention concerns an exhaust gas duct with an exhaust gas guide channel (13) which is placed, leaving an air-filled space (18), in a sheath wherein circulates a cooling liquid and enclosing at least partially said exhaust gas guide channel (13). The invention is characterised in that said sheath is divided along the row of cylinders and has a base body (10b) wherein the exhaust gas guide channel (13) can be inserted, and a cover (3) closing said base body, thereby obtaining a modular structure for transporting exhaust gas which enables continuous control, in particular, control over the exhaust gas guide channel.

Abstract: A feeding dish particularly suited for feeding small animals such as household pets which has a handle permitting the person feeding the animal to avoid bending and to avoid contact with the animal being feed.

Abstract: The invention relates to a method for controlling exhaust gas recirculation in an internal combustion engine. Known methods provide for a control unit which generally controls the exhaust gas recirculation rate via a throttle and a stop valve in accordance with operating parameters of the internal combustion engine. No further information is provided on these operating parameters. The invention provides for a method and a device for controlling exhaust gas recirculation in an internal combustion engine which method and device are able to take into consideration a wide range of operating conditions of an internal combustion engine. To this end the control unit comprises a basic characteristic map (1) above the parameters “rotation per mite of international combustion engine” and “quantity of fuel supplied per operating cycle”. The basic signals of the basic characteristic map (1) can be influenced by correcting units which can be connected as needed and transmit correcting signals.

Abstract: The invention relates to a multicylinder internal combustion engine with two inlet valves and two outlet valves (12, 11), the outlet valves (11) being located on one side of an internal combustion engine and the inlet valves (12) being located on the other side. The outlet valves (11) and the inlet valves (12) are actuated by a camshaft via inlet rocker arms (4) and outlet rocker arms (5). In order to reduce the size of the cylinder heads (1) and the rocker housing (2), the inlet rocker arm (4) and the outlet rocker arm (5) are forked. Each forked rocker arm (4,5) actuates two similar valves (12,11) per cylinder (13). The axes (4a, 5a) of the inlet rocker arms (4) or outlet rocker arms (5) are staggered in relation to each other or preferably overlap.

Abstract: The pinion (10) on the pin shaft (11) and/or the pinion shaft bearings to either side of the pinion and/or the pinion shaft pillow blocks (12, 13) are supported by elastically deformable components (15, 16, 22, 23) so as to automatically adapt radially in an elastically compliant manner to variations in the meshing of the pinion with the rim gear on the driven rotary drum of a tube mill or the like.