Patent ID: 9061168
Filing Date: 2015-06-23
Classification: A62C

Abstract:
1. A device for use in fire-fighting operations comprising an extinguishing device arranged at an end region of a cantilever arm of a device for use in fire-fighting operations and adjustable in at least one spatial direction and comprising a hydraulic system and a penetration fixture that is adjustable relative to the extinguishing device and has a double-acting pressure cylinder that can be subjected to pressure by a pressure medium from the hydraulic system via at least a first control valve, said cylinder having a tubular continuous piston rod, said piston rod being provided on a protruding end with a penetration tool having a through-hole and a nozzle head, and said piston rod being connected at another end in a line to a supply mechanism for an extinguishing medium, the pressure cylinder comprising a first pressure chamber and a second pressure chamber, an extending motion of the penetration tool occurring when pressure is applied to the first pressure chamber by the pressure medium, a retracting motion of the penetration tool occurring when pressure is applied to the second pressure chamber by the pressure medium, further comprising at least one pressure accumulator element in direct fluid communication via a first flow connection with the first pressure chamber of the pressure cylinder, further comprising at least one further pressure accumulator element in fluid communication via a second flow connection with the second pressure chamber and in fluid communication with a return line for the pressure medium, further comprising a second control valve which blocks the flow of the pressure medium from the second pressure chamber into the return line, the second control valve being located upstream of the at least one further pressure accumulator element in an outflow direction of the pressure medium, wherein the first flow connection and the second flow connection have a larger flow cross-section than a flow cross-section of the return line, and wherein a fluid path of the pressure medium is a flow circuit starting from a pressure medium tank, with the return line returning the pressure medium to the pressure tank.