Abstract: A coaxial coupling comprising a female part and a male part which are couplable to each other is disclosed. The female part and the male part having an inner passage and a concentric outer passage, wherein the inner passage of the female part is fluidly connected to the inner passage of the male part and the outer passage of the female part is fluidly connected to the outer passage of the male part in the coupled state of the coupling, one of the parts further comprising a by-pass valve that guides the fluid flow internally from the inner passage to the outer passage thereof in a non-coupled state of the coupling, the other part comprising an activator for activating the by-pass valve during coupling of the two parts wherein the by-pass valve is adapted to guide the fluid flow from the inner passage of the one part to the inner passage of the other part during coupling of the two parts.

Abstract: The invention relates to an electric rescue tool, comprising: a frame (9); a pair of claws (3a, 3b) mounted movably on the frame; a hydraulic drive cylinder (20) received in the frame; a hydraulic pump (11) fixed to the frame; an electric motor (10) fixed to the frame for driving the hydraulic pump; a control unit (19) for controlling the electrical energy to the electric motor and for controlling valves (23) placed between the hydraulic pump and the drive cylinder, a housing (24, 29); and coupling means for coupling a battery (6) to the electric control unit, wherein the coupling means are adapted to couple a battery placed on the housing to the control unit, whereby the battery can be easily gripped by the person operating the electric rescue tool; he/she can grasp the battery with one hand, release and place it for instance in a coat pocket, and then take a fresh battery out of another coat pocket with the same hand and place it on the tool.

Abstract: A rapid-action coupling comprising a male part connected to a first and a third conduit and a female part connected to a second and a fourth conduit for releasable mutual connection of at least the first to the second conduit and also for releasable mutual connection of the third conduit to the fourth conduit. The male part and the female part of the rapid-action coupling each comprise a shell formed in one piece and a plurality of connecting channels. At least at the position of the separating surface between the male and the female parts, the connecting channels arranged in the parts are preferably concentric. According to another embodiment the first and the third conduit and the second and the fourth conduit are mutually concentric.