Dragerwerk Aktiengesellschaft

Helmut Mohr

Wolfgang Falb

Carl F Wallroth

Carl-Friedrich Wallroth

Martin Ryschka

The invention is directed to a vaporizer for an anesthetic medium having a throttle arrangement for throttling the gas flowing therethrough. A compensating arrangement is provided for adjusting a throttle gap in dependence upon ambient temperature and has a rod body made of a material having a low thermal coefficient of expansion. This rod body is accommodated in a sleeve made of a material having a high thermal coefficient of expansion. The rod body is tightly joined at one end thereof to the sleeve and, at its other end, the rod body is joined to a molded part. This molded part and a second molded part conjointly define the throttle gap. With the invention, a thermal adjustment device is provided for the throttle gap for which only simply formed parts are used and which are made of material not resistant to corrosion and which are easily galvanized. The housing of the throttling device is of a complicated configuration and can be made of a corrosion resistant material. The sleeve is surrounded by an enclosure made of corrosion resistant material which is closed in a gastight manner with respect to the throughflow channel conducting the anesthetic gas. The sleeve rests on its sleeve support at its end facing toward the molded part.

Vaporizer for an anesthetic medium

A safety arrangement for filling and emptying an anesthetic vaporizer via a supply vessel connected thereto includes a movable tube-shaped conducting member having first and second ends. A vessel-connecting piece is provided on its first end and an index member is provided on its second end for engaging a vaporizer. The tubular-shaped conducting member has a ventilating channel separate from the filling channel and the safety arrangement is improved with respect to its use characteristics. This improvement is obtained in that a joint piece is connected to the second end of the tubular conducting member intended for the vaporizer. An index member is rotatably journalled in the joint piece and contains respective line segments of the filling channel and the ventilating channel.

Safety arrangement for filling and emptying an anesthetic vaporizer

A receiving arrangement is disclosed for filling an anaesthetic medium from a supply vessel into the charging chamber of an anaesthetic apparatus. The supply vessel is connectable to the arrangement by means of a coupling piece. The arrangement includes a receiving structure having an input opening for receiving the coupling piece therein and a connecting part disposed adjacent the receiving structure. The connecting part includes channels communicating with the charging chamber for conducting the anaesthetic medium to the latter. A closure piece is slidably mounted in the receiving structure to slide between a first position opposite the ports and a second position whereat the closure piece is displaced away from the ports. A resilient biasing spring biases the closure piece into the first position. A drive moves the receiving structure between a rest location whereat the closure piece seals the ports with respect to the ambient and an actuating location whereat the receiving structure and the closure piece are displaced away from the ports. The receiving structure can now receive the coupling piece thereby causing the closure piece to be displaced to its second position. The coupling piece and the connecting part conjointly define a connecting interface whereat the anaesthetic medium flows from the coupling piece into the channels when the structure is returned to the rest location with the coupling piece inserted therein. A blocking piece blocks the entry of the coupling piece through the opening when the receiving structure is in its rest location.

Receiving arrangement for filling an anaesthetic fluid

A locking mechanism for use with two evaporators comprises first and second anesthetic evaporators each having a respective rotatable first and second side-by-side opening valve disc with a radially extending opening therein with an arm located between the disc which has a transverse bore therethrough. The cylindrical latch is slidable in the bore and has an accommodation recess adjacent each of its ends at aligned diametrical locations. A control pin is carried by each of the discs and enters into the opening at one diametrical location and is of a size to be accommodated within the accommodation recess of the latch when the pin and the opening are properly aligned with the accommodation recess of the latch. The latch is positionable in the opening of either selected disc with the pin accommodated within the accommodation recess in a position at which its opposite end frees the other disc for rotation for opening its associated evaporator. The latch is also positionable between the disc so that its respective ends into each opening of each disc to lock both of the discs to prevent opening of both evaporators.

Growing community of inventors

Stockelsdorf, Germany

Helmut Mohr