Abstract: A valve has a closing member that can be brought from a closed position into an open position by a rotational movement about an axis of rotation transverse to a through-flow direction. A shaft is connected to the closing member and comprises a shaft end. A valve housing has an adjusting device, which has an adjusting device housing and comprises a receptacle in which the shaft end can be received. In order to be able to fix the valve in a switching position, a shaft portion comprises a passage that can be made congruent with two housing-side openings. The passage and the openings can be penetrated by a securing body, and the connection between the shaft and the shaft portion is secured against release when the passage and the openings are congruent.

Abstract: An adjusting device (3) is suitable especially for use on a stand (1) for a surgical microscope (2). The adjusting device (3) makes it possible to move the surgical microscope (2) in a plane (9) perpendicular to the optical axis (8) of the surgical microscope (2). For this purpose, a transmission is provided in the adjusting device (3) which includes a coupling plate which is operatively connected to two force-transmitting elements. When this transmission is moved, at least one of the force-transmitting elements rolls off on the coupling plate. Alternatively, this transmission can be built up as a four-point linkage chain or contain a rhombic mechanism or lever mechanism. It is also possible to configure the transmission with belt elements or to configure the same as an eccentric arrangement having two offset rotation centers.

Abstract: The invention relates to an adjusting device (3) which is suitable especially for use on a stand (1) for a surgical microscope (2). The adjusting device (3) makes it possible to move the surgical microscope (2) in a plane (9) perpendicular to the optical axis (8) of the surgical microscope (2). For this purpose, a transmission is provided in the adjusting device (3) which includes a coupling plate which is operatively connected to two force-transmitting elements. When this transmission is moved, at least one of the force-transmitting elements rolls off on the coupling plate. Alternatively, this transmission can be built up as a four-point linkage chain or contain a rhombic mechanism or lever mechanism. It is also possible to configure the transmission with belt elements or to configure the same as an eccentric arrangement having two offset rotation centers.