Ventilator/anesthetic system comprising a manually operated safety valve device

摘要

Ventilators and anesthetic systems are generally equipped with a plurality of different safety functions. An improved, manually operated safety valve device (46) is described in the present invention. The safety valve device (46) comprises a valve body (52), slideingly arranged inside a valve body (54). The valve body (52) is connected to an operating means (48), and when the operating means (48) is not operated the valve body (52) is retained in a first position by a spring (50), which presses against the operating means (48). When the operating means (48) is partly depressed, a gas channel (66) is exposed to an input channel (56) and gas can pass to an output channel (58) at a first defined flow rate. The operating means (48) can be affixed in this position with the aid of an arresting unit (68). If a larger flow of gas is needed, the operating means (48) can be depressed all the way, whereupon a flow-through channel with a lower resistance to flow opens to pass a second defined flow of gas.