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US 7,730,885 B2Granted
Device for mixing anesthetic vapor with anesthetic gas
AssigneeDräger Medical GmbH
InventorsKarl-Ludwig Gippert, Claus Bunke, Matthias Witt, Rainer Kunz, Jürgen Müller, Sven Heyer, Michael Heidschmidt, Dirk-Stefan Reichert
Life of this patent
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Abstract
A device for mixing anesthetic vapor with anesthetic gas has a pressure limitation feature achieved in a simple manner. The device has a valve device (11), with which the evaporator is switched on and off. The valve device (11) is equipped with an overpressure release device (22).
Claims8
A device with a dispensing device for mixing anesthetic vapor with anesthetic gas, the device comprising:
- a valve device to send anesthetic gas past the dispensing device from a gas inlet to a gas outlet in a first switching position and to establish a path for the gas via the dispensing device in a second switching position and including a lower part provided with gas ducts at the valve device and with an upper part arranged adjustably above said lower part, said upper part including gas ducts with upper part and lower part gas ducts defining ducts extending from the lower part via the upper part and back into the lower part in such a way that the first switching position and the second switching position can be established depending on the position of the upper part in relation to the lower part;
- and
- a clamping device fixing the upper part in relation to the lower part in the form of a pressure limiting means for limiting the pressure in the gas ducts, said clamping device opening for gas release for pressure limiting and automatically closing again.
An anesthetic vapor with anesthetic gas mixing device, comprising:
- a dispensing device for mixing anesthetic vapor with anesthetic gas, the device comprising:
- a valve device for controlling gas flow to the dispensing device including a first switching position for gas flow from a gas inlet to a gas outlet and a second switching position to establish a path for the gas via the dispensing device in the second switching position, the valve device including a lower part provided with gas ducts and an upper part arranged adjustably above said lower part, said upper part including gas ducts with upper part and lower part gas ducts defining ducts extending from the lower part via the upper part and back into the lower part in such a way that the first switching position and the second switching position can be established depending on the position of the upper part in relation to the lower part;
- and
- an overpressure release means for holding the upper part in relation to the lower part up to a pressure level prevailing in the ducts extending from the lower part and allowing venting of the ducts extending from the lower part via the upper part upon the pressure level prevailing in the ducts extending from the lower part exceeding the pressure level, the over pressure release means opening the upper part relative to the lower part for gas release for pressure limiting and automatically closing the upper part relative to the lower part again.
1 more element
Dependencies are inferred from the claim text.