Abstract: A mixture formation device for an internal combustion engine operated with a burnable gas, preferably compressed natural gas CNG, comprises a combination of a quantity regulator, a gas mixer, a flow-guiding element for pressure recovery, and a connection possibility for exhaust gas recirculation of the internal combustion engine. The mixture formation device according to the invention can empty a gas tank to a comparatively low pressure of approx. 2 bar, an excellent mixture formation being achieved over the entire range of speed and load range of the internal combustion engine. According to the invention, such a mixture formation device can reduce production costs as well as space requirements compared to known solutions. An internal combustion engine operated with a burnable gas, particularly compressed natural gas (CNG), may also comprise such a mixture formation device in the intake tract thereof.

Abstract: The invention relates to a mixture formation device for an internal combustion engine that is operated with a combustible gas, preferably compressed natural gas (CNG). The mixture formation device comprises a combination of a quantity regulator, a gas mixer, a flow guide element to recover pressure as well as a connection capability for recirculating the exhaust gas of the internal combustion engine. Owing to the mixture formation device according to the invention, a gas tank can be emptied down to a relatively low pressure of approximately 2 bar, whereby an excellent mixture formation is achieved over the entire speed and load ranges of the internal combustion engine. It is provided that, owing to the mixture formation device according to the invention, the installation space requirements as well as the production costs can be reduced in comparison to prior-art solutions.

Abstract: A centralized surgical instrument unit for use in a surgical operating area is provided. The surgical instrument unit includes a tripod having at least two articulating arms, one of which extends into a sterile operating area and another of which extends outside of the sterile operating area. A housing containing at least two instruments or instrument components is mounted to the articulating arm which extends outside of the sterile operating area. A user interface unit is mounted on the arm which extends into the sterile operating area. The user interface unit includes a central instrument status display unit and a central input unit, and displays instrument parameters and status to, and receives instrument commands from, personnel within the sterile operating area.

Abstract: An instrument and service unit, according to this invention, for a surgical operating workplace includes a tripod, in particular a ceiling tripod, a housing mounted on an arm of the tripod, at least two instruments and/or instrument components that are contained in the housing, a central control unit which directs and monitors the instrument functions, a central service unit, a central supply unit with central provision connections provided on the housing for the input and/or output of data and/or working media, and a central display unit. In addition the central control unit, service unit, and display unit are combined as a single unit and movably connected to the integrated instrument and supply unit.

Abstract: A centralized surgical instrument unit for use in a surgical operating area is provided. The surgical instrument unit includes a tripod having at least two articulating arms, one of which extends into a sterile operating area and another of which extends outside of the sterile operating area. A housing containing at least two instruments or instrument components is mounted to the articulating arm which extends outside of the sterile operating area. A user interface unit is mounted on the arm which extends into the sterile operating area. The user interface unit includes a central instrument status display unit and a central input unit, and displays instrument parameters and status to, and receives instrument commands from, personnel within the sterile operating area.