Abstract: A metering device for a liquid anesthetic that is fed from a reservoir via a supply line into a heatable intermediate container maintained under pressure, from which gaseous anesthetic is fed via a metering valve into a fresh gas line. Accurate metering, which can be better monitored, is provided for low-boiling anesthetics. A supply unit 7 is mounted in the supply line 5, and liquid anesthetic is transported by the supply unit 7 into the intermediate container 6 until it is filled up to a predetermined filling level. A heating device 12 stabilizes the temperature of the liquid bath and ensures a sufficiently high vapor pressure of the gaseous anesthetic above the liquid phase. The anesthetic vapor is sent via the metering valve into the fresh gas line.

Abstract: A metering pump for metering low-boiling liquids, especially liquid anesthetics provides continuous metering of liquid. To achieve this, the pump chamber 7 is maintained at a temperature below the boiling point of the liquid by means of a cooling device 14, preferably a Peltier cell.

Abstract: An anesthetic metering device is provided with a temperature-stabilized anesthetic vapor source, from which anesthetic vapor 14 is metered into a carrier gas stream via a delivery line 8 with a metering valve 11 that can be controlled by a control unit 6. The arrangement is provided so that uncontrolled evaporation of anesthetic is prevented. To accomplish this task, the anesthetic vapor source is designed as a vaporizer chamber 2 filled with liquid anesthetic 3, and a gas delivery element 9 generating the metering pressure P.sub.I is present in front of the metering valve 11.

Abstract: An anesthetic metering device with a bypass stream 5 passed from a gas inlet opening 2 via a bypass valve 3 to a gas discharge opening 4 and with a vaporizer chamber stream 7 flowing from a vaporizer chamber 6 via an adjusting device. Accurate metering is possible even in the case of anesthetics with low boiling points by manufacturing the vaporizer chamber 6 at least at the saturation vapor pressure of the anesthetic 22. The adjusting device includes a differential pressure transducer 9 connected on both sides of the bypass valve 3 and a metering valve 10, wherein the metering valve 10 is actuated by the output quantity 11 of the differential pressure transducer 9 via a proportional member 12 so that the concentration is adjusted via the variable transmission ratio of the proportional member 12.

Abstract: A locking device 5 for a metering device 3 of an anesthetic vaporizer 1 with an unlocking device 6 for actuating the metering device 3 is provided so as to ensure blocking of the unlocking device 6 in operating states that are unsuitable for the operation of the anesthetic vaporizer 1. The locking device 5 is provided having a final control element 20, 24, 29 that covers a regulating distance that depends on a parameter influencing the operating state of the anesthetic vaporizer 1. This regulating distance of the final control element is transmitted to a blocking device 13 which blocks the unlocking device 6 if the values of the parameter are unsuitable for the operation of the anesthetic vaporizer 1.

Abstract: The invention is directed to a filling arrangement for filling and emptying an anesthetic vaporizer with an anesthetic liquid from a supply vessel via a filling channel and a venting channel. The filling arrangement includes a connecting piece for connecting the arrangement to the anesthetic vaporizer and has a blocking device mounted in a conduit member which includes the filling channel and venting channel. The filling arrangement is improved so that it can be reliably handled with anesthetic liquids having a low boiling point. For this purpose, the blocking device includes a temperature-sensitive switching member which enables the filling channel to be opened below a preselected limit temperature and to be closed above this preselected temperature. The preselected temperature is below the boiling point of the anesthetic liquid.

Abstract: A medical supply unit with a height-adjustable connection head, e.g., in the form of a ceiling-mounted supply unit or ceiling lamp, is able to receive a working device, e.g., an anesthesiological apparatus, while ensuring reliable coupling for this purpose, so that the user will be able to perform a procedure reliably, with the working device being correctly connected. This is made possible by a coupling part 34 equipped with guide faces 35, with which a receiving part 14 engages, which is provided with complementarily extending receiving jaws 15 and which actuates--in the case of correctly fitting engagement--electrical contacts 18, such that the control elements 10 provided on a control panel 9 for height adjustment of the connection head 1 and/or for supplying the working device 30 with the media needed for operation are released.

Abstract: 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.

Abstract: 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.

Abstract: A device for supplying anesthetic dispensing systems with liquid anesthetics from one or more storage vessels is, for the purpose of easy exchange of different storage vessels containing different anesthetics, includes a module defining a receiving cavity which can be connected with the anesthetic dispensing system via an anesthetic infeed and can also be connected to a selected bottle or container.

Abstract: An overflow trap on a reservoir for liquid anesthetics with at least one inlet conduit for filling and an overflow conduit for overflow which both open at its side wall. The entering of anesthetic liquid from a feed tank through the inlet and the overflow of anesthetic due to shifts or rocking of the liquid level is prevented. For this purpose, the inlet conduit and the overflow conduit are slanted toward the bottom of the reservoir and they have openings close to a wall of the reservoir which is opposite to the inlet and the overflow openings of the conduits.

Abstract: An anesthetic vaporizer with a vaporizer chamber into which leads a gas inlet channel for fresh gas and which is connected via an outlet channel with a proportioning unit containing setting means for the anesthetic concentration to be released to the fresh gas is to be improved in such a way that exchanging the various anesthetics is made possible to only a single proportioning unit. The vaporizer chamber is a self-enclosed housing part to be coupled to the proportioning unit via connectors and the setting means are adjustable to the release of the respective anesthetic used.

Abstract: 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.

Abstract: The invention is directed to an arrangement for adding liquid anesthetic medium to the respiratory gas to be directed to a patient and is applicable to a closed respiratory system wherein an adequate quantity of the anesthetic medium must be supplied in a small respiratory gas volume and is also applicable to an open system wherein large quantities of anesthetic medium are required. The arrangement of the invention includes a plurality of tanks containing anesthetic mediums and a selection switch which can be selectively switched to any one of the tanks. A pump is located after the selection switch and a change-over switch permits switching the anesthetic medium from the pump to an anesthetic medium vaporizer and a swirl chamber. The anesthetic medium is vaporized in the vaporizer and then conducted at high concentration into the respiratory gas directed to the patient. The gas can be guided in a closed system.

Abstract: In anaesthetics evaporators, the gas flow conducted through them is enriched with an anaesthetic contained in the evaporator to a desired concentration. In the anaesthetics evaporator the gas flow is divided into two part flows, the by-pass flow and the evaporating chamber flow. Both part flows are regulated by valves and regulators to obtain an exact relative flow ratio. To achieve this, this ratio must be maintained and monitored. The monitoring equipment is simple and can be retrofitted. It includes a differential pressure measuring instrument and a thermometer with a holder. The differential pressure measuring instrument is a differential pressure manometer connected via hoses and an adapter to both the inlet and outlet of the gas flow to the anaesthetics units. The thermometer to measure the evaporating temperature is fastened in well heat conducting manner to the anaesthetics evaporator by means of a holder.

Abstract: 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.