Abstract: The invention relates to a spring-loaded brake with a first housing part (2) connected to a first brake calliper arm (26) and a second housing part (14) connected to a second brake calliper arm (28) and with an actuation device (18), by means of which the first and second housing part (2, 14) are capable of being moved relative to one another. The air passage as well as the wear of this spring-loaded brake can be monitored reliably and in a simple manner by means of a measuring device (7, 10) which continuously monitors the change in the relative position of the housing parts (2, 14).

Abstract: A bridging device for hydrodynamic hydraulic couplings (1), more particularly for turbo couplings of variable or constant filling, which couple a prime mover to a machine and whose input shaft (5) can be coupled by means of the bridging device (D), having a force-transmitting device (11), to its output shaft (8) to increase efficiency of transmission. The force-transmitting device (11) of the bridging device (D) is uncoupled from the rotary motion of the hydraulic coupling (1) and can be controlled by means of a control device disposed outside the casing (2), the bridging device being controllable by means of a fluid.