Abstract: An oil pump for an internal combustion engine for drawing up the lubricating oil situated in an oil collector device has an oil pump housing wherein at least two pairs of gears are disposed. The pairs of gears, in order to form the pumping stages, are connected on the suction side to a suction passage formed in the oil pump housing and on the delivery side to a delivery passage. The oil pump housing is further formed with an oil supply passage that is connected to the suction passage of a first pumping stage and via which lubricating oil can be delivered to the suction side of the first pumping stage.

Abstract: An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the valve piston, and an adjusting device serving to adjust the valve piston in the direction of or counter to the force exerted by the valve-actuating pressure. A displacement pump exhibiting an adjustable delivery volume, includes a pump casing, a delivery chamber formed in the pump casing and a delivery member and the adjusting valve for adjusting the delivery volume, arranged in a flow of the fluid delivered by the delivery member.

Abstract: A device for adjusting the phase position of a cam shaft of an internal combustion engine and for supplying an assembly with a partial vacuum, said device comprising: a phase setter for adjusting the phase position of the cam shaft relative to a crankshaft of the internal combustion engine; a vacuum pump for the assembly; and an attachment housing for the vacuum pump, wherein the attachment housing is mounted on the internal combustion engine and forms a housing or at least a housing cover for the phase setter.

Abstract: A toothing of a toothed wheel, consisting of tooth tips and tooth roots of teeth which are formed by second or higher order curves, wherein said curves point tangentially toward each other at their ends, and wherein at least the curves forming the tooth tips or at least the curves forming the tooth roots are not cycloids.

Abstract: A rotary pump having a variable delivery volume, comprising: a casing; a delivery chamber formed in the casing; at least one delivery rotor which is rotatable in the delivery chamber; an actuating member which is arranged facing a front face of the delivery rotor or surrounds the delivery rotor, and is moveable in the casing for adjusting the delivery volume; the actuating member chargeable with an actuating force which is dependent on a fluid requirement; a track which is formed in the casing and guides the actuating member on an actuating member sliding surface in a sliding contact; and a sliding material which forms at least one of the track and the actuating member sliding surface.

Abstract: External gear pump, comprising: a casing (3a, 3b) with a gear chamber (4), comprising an inlet (5) for a fluid on a low pressure side and an outlet (6) on a high pressure side and comprising axial and radial sealing stays (7, 8); toothed wheels (1, 2) being in toothed mesh, wherein the external toothings of the wheels (1, 2) form delivery cells (10) for the fluid which are axially sealed off by the axial sealing stays (7) and radially sealed off by the radial sealing stays (8); and at least one pressure fluid supply (15, 16) through which pressure fluid may be supplied to the low pressure side, wherein the at least one pressure fluid supply (15, 16) opens on the low pressure side into a delivery cell (10) which is radially opposed by one of the radial sealing stays (8).

Abstract: A roller body for a roller, for pressure-treating or temperature-treating or combined pressure- and temperature-treating a web-shaped medium, for example paper, includes a casting body made of an iron-based alloy comprising graphite lamellae. Particular regions of the roller body are placed under tensile stresses during or after production. The stresses being applied are larger than those which occur in these regions during operation of a roller. The additionally applied tensile stresses trigger local plastic deformations in peripheral regions of the graphite lamellae, such that once the tensile stresses are no longer applied, the roller body behaves elastically and no longer permanently deforms up to the stress level achieved.

Abstract: A roller for thermally treating web-shaped media, comprising a roller body which is rotatable about its central longitudinal axis, and peripheral bores introduced in axial parallel in the roller body, for conveying a heating medium, wherein other axially parallel balancing bores are formed in the roller body in addition to the peripheral bores for the heating medium, said balancing bores running from an end face of the roller body towards the center of the roller body.

Abstract: In a group of rolls for a calender for processing material webs, comprising at least two rolls each having a roll body made of a cast or forged iron material, at least one of the roll bodies consists of chilled cast iron or shell-chilled cast iron. One or more rolls may have a cover of a resilient material, such as a polymeric plastic. Although it is possible for the outer diameters of the rolls to differ, the sag of the rolls when they are supported only in their rolling-contact bearings is substantially equal. In order to produce appropriate rolls, following the essential machining steps of the roll bodies, that is to say, for example, following casting, following preliminary turning, following preliminary boring and, if appropriate, following the introduction of peripheral bores, the actual mean modulus of elasticity of the entire roll body is measured and, as a function of this, in particular the inner diameters of the central bores are produced.

Abstract: The invention is related to a pump, preferably a positive-displacement pump, comprising: a) a rotary drive member (1) driven at a speed dependent on a speed of a driving motor; b) a casing (3); c) and a first feed wheel (5) arranged in said casing (3), said first feed wheel (5) being coupled to said rotary drive member (1) for introducing a torque; d) said first feed wheel (5) forming, with the walls of said casing alone or in conjunction with a second feed wheel (6), a delivery space (7) comprising a low-pressure side (8) connected to a pump inlet port and a high-pressure side (9) connected to a pump outlet port; wherein: e) limiting delivery of said pump is achieved by using a magnetic clutch (11-17) which couples said rotary drive member (1) to said first feed wheel (5) for transmitting said torque; f) an input half (11-14) of said magnetic clutch (11-17) is non-rotatably connected to said rotary drive member (1), and an output half (15-17) of said magnetic clutch (11-17) is non-rotatably connected

Abstract: A roll for thermal and mechanical treatment of a web-shaped product, for example paper, comprises a roll body (1), thermal treatment conduits (2), insulating devices (4, 5; 4a, 5), a trunnion flange (3), and actuators (8). The insulating devices are capable of elongation in the thermal treatment conduits in the longitudinal direction of the conduits. The treatment conduits are for a thermal treatment fluid and are oriented in the roll body in the vicinity of the surface of the roll body. The trunnion flange is applied to the roll body, and the actuators are mounted in the trunnion flange and connected to the insulating devices. The actuators are mounted shiftable and fixable in the longitudinal direction of the thermal treatment conduits and are connected to the insulating devices for joint shifting.

Abstract: A metallic cast material for friction bodies in acceleration or deceleration devices, particularly in the brake or clutch systems of road or rail vehicles, is produced from the iron/aluminum/carbon tertiary group so that the material is largely in the intermetallic phase having an ordered crystal lattice structure, and free carbon in lamellar, sphoroidal or vermicular form is present therein. The proportion of aluminum in the alloy is between 20 and 28% by weight, preferably 24% by weight. The material may be melted and cast open to the air. Solid or internally ventilated brake discs are mentioned as appropriate friction bodies. The friction bodies are lighter, more resistant to corrosion and wear, have a higher alternate bending fatigue strength and are at least as easily workable as previously known friction bodies made from ferrous materials.

Abstract: A variable-delivery external gear pump comprising a casing, at least one rotatively driven pair of gears comprising two intermeshing spur gears, which form with shell surface areas of the casing and axial sealing surface areas a delivery space comprising a low-pressure side connected to a pump inlet port and a high-pressure side connected to a pump outlet port, and a piston, serving to rotatively mount one spur gear of the pair of gears, said piston being shifted relative to the other spur gear of the pair of gears so as to vary the delivery of the pump together with the one spur gear by charging the high-pressure side with fluid against the force of a return element, wherein formed in at least one axial sealing surface area adjoining a sealing land of the sealing surface area is at least one pocket connecting a zone of deepest tooth engagement of the spur gears to either the pump outlet port or the pump inlet port.

Abstract: The invention relates to a method of producing a grinding roll in which a roll tire made from a highly wear-resistant bainitic cast material is applied to the basic roll body. In order to create a roll tire with particularly high reliability against fractures and with relatively high wear resistance and compression strength, the roll tire is produced from a ductile bainitic spheroidal graphite cast material having a breaking elongation of approximately 0.1 to 2.5% and a compression strength of approximately 1,000 to 1,800 Mpa.

Abstract: A roller or roll heated by a gaseous heat carrier medium, preferably steam, having axially parallel peripheral passages for use in the pressing or smoothing station of paper making machines is connected to a device for the feeding and draining of the heat carrier medium so that for cooling the heated roller a cooling means is switched into the heating/cooling circuit and the direction of flow of the heat carrier medium may be reversed. Further aspects in accordance with the invention permit regulated cooling of the roller by blending heat carrier condensate into the return flow of heat carrier, by switching over between operation with a gaseous heat carrier and operation with a condensed heat carrier, as well as application of the invention in rollers having roller drive arranged on one flanged trunnion.

Abstract: A gear pump with internal rotors for pumping fluids includes one or more internal gear rotors, a cover, at least one infeed reniform suction chamber in a pump housing, at least one discharge reniform pressure chamber in the pump housing, and a reniform pressure chamber extension. Each gear rotor has teeth, is located in the pump housing, and is driven by a central shaft. The cover seals the pump housing and is adjacent to the one or more internal gear rotors. Each infeed reniform suction chamber has a first end and a second end, and at least partially covers end areas of the teeth. Each discharge reniform pressure chamber has a first end and a second end, and at least partially covers the end areas of the teeth. The reniform pressure chamber extension has a first end and a second end and is located in the cover opposite the discharge reniform pressure chamber. The first end of the discharge reniform pressure chamber is substantially adjacent to the first end of the reniform pressure chamber extension.

Abstract: A steam-heated roll having a longitudinal axis and a roll center, comprising substantially axially extending heating passages for heat supply arid removal, and discharge passages for condensate dewatering extending substantially radially from the heating passages to the roll center. The discharge passages include at least one cross-sectional constriction for effecting a turbulent mixing of condensate mixed with the steam during passage through the discharge passages.

Abstract: For influencing the run of a deep hole drilled passage in a metallic or non-metallic material a pusher pad (6) variable in strength and position is interposed between the drill rod (2) driving the drill tool (1) or the drill tool (1) itself and the inner wall of the drilled passage so that it causes a bending of the drill rod such that the drill tool assumes a changed run. The variation in the position and/or thickness of the pusher pad (6) can be fed back to the sensing of the corresponding position of the drill tool (1) and controlled by the results of sensing.

Abstract: An external-rotor-driven lubricating pump comprising a lubricant guidance part including a suction port, an outer wall, a carrier section, a discharge port, a lubricant feed space disposed between the carrier section and the outer wall and connected with the suction port, with a lubricant delivery space disposed between the carrier section and the outer wall and connected with the discharge port, and a pump part including a drive gear, an internally-toothed external rotor, with an externally-toothed internal rotor having one tooth less than the number of teeth on the external rotor, the external rotor and the internal rotor upon meshing pumping the lubricant from the lubricant feed space into the lubricant delivery space, with a shaft supporting the drive gear in the carrier section, the drive gear being fixed to the external rotor, the drive gear forming together with the external rotor the outer closure of the lubricating pump at its pump part end, with the internal rotor being mounted loosely on a collar o