| 摘要 |
A compressed gas operated instrument with a compressed gas cartridge which can be connected to a feed channel for compressed gas flowing out, and with a control valve of simplified structure in the feed channel, which influences the compressed gas flow through the feed channel. The control valve comprises a valve body sealed off in a valve chamber with respect to the chamber wall by means of a first seal and displaceably mounted in the valve chamber and, upstream, is connected to a connecting element and sealed off by means of a second seal and, in the event of a displacement in the valve chamber, can also be displaced with respect to the connecting element. The connecting element has a continuous flow channel and, on the incoming side, is connected in a sealed manner to the feed channel; the valve body has a flow passage which, on the outgoing side, is connected to the adjacent feed channel on the downstream side; the valve body can be displaced in the valve chamber between an open position and a closed position counter to the flow direction, in which the valve body bears in a sealing manner on the flow channel of the connecting element and closes the latter as a result; the valve body is loaded into the open position by a spring element; and the cross-sectional area of the valve body that is enclosed by the first seal is greater than the cross-sectional area enclosed by the second seal. |
