Abstract: An axial fan wheel, in particular for the radiator of a motor vehicle engine, is described. The axial fan wheel includes a crown ring having a multiplicity of rotor blades, a hub having an inner ring which is connected or connectable to a drive shaft, and having, for the purpose of torque transmission, connection surfaces along an outer periphery of the hub which are connected to the inner ring and to the crown ring. The hub has through-passages between the inner ring and the outer periphery. At least one element, arranged rotationally fixedly on the axial fan wheel inside the crown ring, is designed to maintain a pressure difference in the axial direction when the axial fan wheel rotates.

Abstract: An axial fan wheel, in particular for the radiator of a motor vehicle engine, is described. The axial fan wheel includes a crown ring having a multiplicity of rotor blades, a hub having an inner ring which is connected or connectable to a drive shaft, and having, for the purpose of torque transmission, connection surfaces along an outer periphery of the hub which are connected to the inner ring and to the crown ring. The hub has through-passages between the inner ring and the outer periphery. At least one element, arranged rotationally fixedly on the axial fan wheel inside the crown ring, is designed to maintain a pressure difference in the axial direction when the axial fan wheel rotates.

Abstract: An axial fan wheel, in particular for the radiator of a motor vehicle engine, is described. The axial fan wheel includes a crown ring having a multiplicity of rotor blades, a hub having an inner ring which is connected or connectable to a drive shaft, and having, for the purpose of torque transmission, connection surfaces along an outer periphery of the hub which are connected to the inner ring and to the crown ring. The hub has through-passages between the inner ring and the outer periphery. At least one element, arranged rotationally fixedly on the axial fan wheel inside the crown ring, is designed to maintain a pressure difference in the axial direction when the axial fan wheel rotates.

Abstract: An axial fan wheel, in particular for the radiator of a motor vehicle engine, is described. The axial fan wheel includes a crown ring having a multiplicity of rotor blades, a hub having an inner ring which is connected or connectable to a drive shaft, and having, for the purpose of torque transmission, connection surfaces along an outer periphery of the hub which are connected to the inner ring and to the crown ring. The hub has through-passages between the inner ring and the outer periphery. At least one element, arranged rotationally fixedly on the axial fan wheel inside the crown ring, is designed to maintain a pressure difference in the axial direction when the axial fan wheel rotates.

Abstract: A device for removing fluids and solid substances by suction from the mouth and oral cavity area during dental-medical treatments is provided. The device includes a first tube segment, a first end of which can be charged with low air pressure, and to the second end of which a sleeve-like ejector tip is attached. By a relative movement of the ejector tip on the tube segment, the ejector tip can be alternated between a first suctioning position and a second suctioning position. In the second suctioning position, only the opening on the upper front side of the second end of the tube segment functions as a suction opening to allow point-focused suctioning with high suction force. In contrast thereto, in the first suctioning position, a plurality of additional suction openings is provided around the circumference to remove fluids from the mouth and oral cavity area by suction. Thus, it is possible to alternate between both suctioning positions without having to disassemble the saliva ejector.

Abstract: A lever (30) is pivotably mounted about ax axis Z on a carrier journal (24) which is pivotable about an axis X and with which electromagnets (46, 48) cooperate. The lever carries a thread-receiving member (20) and is under the effect of a tension spring (42). When the thread is intercepted by the thread-receiving member during the forward rotation of the cop, there follows a deflection of the thread-receiving member, which takes place with the tension spring being tensioned at the same time and which is caused by the thread, on a path approximate to the movement of the traveller on the ring. The tensioned tension spring pivots the thread-receiving member during the paying-out of thread which occurs as a result of the subsequent reverse rotation of the cop. As a result of the intermediate blocking about one of the axes, the thread-receiving member moves on a path lying approximately in a tangential plane relative to the ring.

Abstract: An apparatus for automated replacement of ring travelers on spinning or twisting rings is disclosed comprising generally a housing having two planar support members, parallel to each other. A lift-out device is pivotably supported in a first of the two planar members and a device for the attachment of a new ring traveler is supported in the second plane, parallel to the first plane. The devices function by guide systems, pivotable by eccentric cams, located on a common drive shaft to be able to move the two devices between an operational and an off position. A housing, containing the two devices, is mobile along a ring rail of a spinning machine. The lift-out device lifts out a ring traveler which is to be replaced from the spinning ring on the ring rail. The attachment device subsequently attaches a new ring traveler from a magazine rod onto the spinning ring.

Abstract: An elongate, flexible storing or magazine element serves to receive at its outside ring travellers to be used in spinning or twisting machines. The storing element comprises a profiled strip composed of a retaining member and a back or spine member. The retaining member is positioned within the internal space of the ring travellers and the leg portions of the ring travellers are clamped at the retaining member. The back member is wider than the retaining member; it is positioned outside the ring travellers and serves as an abutment or stop for the leg portions of the ring travellers. This storing or magazine element permits each ring traveller to be individually retained and independently of the preceding and subsequent state and the number of ring travellers stored on the profiled strip.

Abstract: Ring travelers supplied on a magazine strip are transferred to a magazine bar by pulling at the magazine strip in a predetermined direction. At its front end the magazine bar is bent-off at right angles and is tapered in order to form a hook at this location for placing a momentarily preparatory-held ring traveler onto the annular flange of a spinning or twisting ring. The preparatorily-held ring traveler is clamped between the hook and a separator element in a tongue-like manner. The separator element is connected to a housing structured as a handle by means of a pivotable support. To mount the ring traveler at the angular flange of the spinning or twisting ring the handle-like housing must be retracted, and during this retraction the magazine bar which is mounted at a slide is pulled out from the housing against the force of a spring.