Abstract: A current collector for an electrically powered vehicle has an articulated supporting rod supporting a rocker assembly and a lifting drive. The supporting rod is a pantograph with a lower arm and an upper arm and an elbow joint. The rocker assembly has a rocker frame with mutually parallel upper and lower transverse beams. The beams are connected centrally by a center strut and on each end side by a lateral strut on swivel joints. The upper arm is connected on the contact wire side to the center strut via a rocker joint. The contact strips of the two contact poles are supported on the rocker frame symmetrically with respect to the center strut. In this way a current collector is provided by which, with a simpler construction, a consistent contact force can be achieved between contact strips and contact wires of the overhead line system.

Abstract: The invention relates to an intra-oral camera having an imaging system for depicting the object located in front of an observation window of the camera on a recording unit, wherein the imaging system has at least one focusing unit for setting a suitable focus and an aperture unit for forming a variable aperture. The setting of the aperture is carried out independently of the focus adjusted by the focusing unit.

Abstract: The invention relates to a valve for controlling a flow of a fluid through a fluid channel, comprising a tube of flexible material in which a section of a fluid channel is formed, a valve component assigned to the tube, a squeeze element, which is formed and configured on the valve component by pressing against an outside surface of the tube to control a flow of a fluid through the fluid channel, optionally up to the closing of the fluid channel, a guide section, which is formed on the valve component, and a guide assigned to the valve component, which cooperates with the guide section in a relative movement of the guide and valve components relative to one another in the longitudinal direction of the tube, such that the squeeze element is displaced in the relative movement, changing the pressure on the outside surface of the tube and thus changing the flow through the fluid channel.

Abstract: The invention relates to a valve device for controlling a flow of a fluid through a fluid channel, having a tube (2) made of a flexible material, in which a section of a fluid channel is formed, a valve component (1) assigned to the tube (2), a cantilevered arm (8), which is designed to be reversibly displaceable on the valve component (1) against a restoring force supplied at least partially by the cantilevered arm (8) itself, a squeeze element (10), which is arranged on a distal end of the cantilevered arm (8) for support of the cantilevered arm (8) on the valve component (1) and is configured to control a flow of a fluid through the fluid channel by pressing against an outside surface of the tube (2), optionally up to the closing of the fluid channel, and an actuator (11) which is configured to displace the squeeze element (10) in various control directions against the restoring force on the cantilevered arm (8), so that the pressure of the squeeze element (10) on the outside surface of the tube (2) and th

Abstract: The invention relates to an intra-oral camera having an imaging system for depicting the object located in front of an observation window of the camera on a recording unit, wherein the imaging system has at least one focusing unit for setting a suitable focus and an aperture unit for forming a variable aperture. The setting of the aperture is carried out independently of the focus adjusted by the focusing unit.