Abstract: An inspection device for an ultrasound flow meter is provided that has an inspection chamber having a fluid at a flow velocity of zero and having a first installation station for a first ultrasonic transducer and having a second installation station for a second ultrasonic transducer of the ultrasound flow meter so that the ultrasonic transducers are aligned toward one another in the installed state and span an ultrasound measurement path through the inspection chamber on the connection line. The invention further relates to a method of inspecting and/or calibrating an ultrasound flow meter.

Abstract: An ultrasound flow measurement apparatus (10) for determining the flow rate of a fluid flowing in a line (12) is provided having at least one measurement path (18) at which a first ultrasonic transducer (16a) and a second ultrasonic transducer (16b) are arranged opposite one another with the flowing fluid between them, and having an evaluation unit that is configured to calculate the flow rate from a time of flight difference of ultrasonic pulses along the measurement path (18) in the direction with the flow (14) and against the flow (14). The ultrasonic transducers (16a-b) here are positioned such that a specific part pulse is isolated in time in a received signal of the respective receiving ultrasonic transducer (16a-b), with the part pulse corresponding to a direct sound, a reflected sound, an axially broken fluid sound, or an azimuthally broken fluid sound.

Abstract: An inspection device for an ultrasound flow meter is provided that has an inspection chamber having a fluid at a flow velocity of zero and having a first installation station for a first ultrasonic transducer and having a second installation station for a second ultrasonic transducer of the ultrasound flow meter so that the ultrasonic transducers are aligned toward one another in the installed state and span an ultrasound measurement path through the inspection chamber on the connection line. The invention further relates to a method of inspecting and/or calibrating an ultrasound flow meter.

Abstract: An ultrasound flow measurement apparatus is provided having a plurality of ultrasonic transducers for determining the flow rate of a fluid flowing in a line, said ultrasound flow measurement apparatus having a plurality of measurement paths at which two respective ones of the ultrasonic transducers are arranged opposite one another with the flow being arranged therebetween and with a mutual axial spacing in the longitudinal direction of the line and having an evaluation unit that is configured to calculate the flow rate from time of flight differences of ultrasonic signals along the respective measurement paths in the direction with the flow and against the flow. The measurement paths have different axial offsets here.

Abstract: A trocar sleeve for minimally invasive surgery, having a first sleeve part, which has essentially the shape of a straight tubular piece with a longitudinal axis, and having a second sleeve part, which at least partly surrounds the first sleeve part in close contiguity and is movable during use with respect to the first sleeve part. The mobility of the second sleeve part in relation to the first sleeve part consists essentially only in rotatability of the second sleeve part around the first sleeve part, and in addition the first sleeve part and the second sleeve part each comprise on their distal axial ends a flange part that extends radially outward at an angle of less than 180 degrees from the respective sleeve part.

Abstract: A device for providing an access opening in a body, in particular for a spinal operation, comprised of a tubular device body (12) that extends along a longitudinal axis (L) of a device body, said body having a distal end (14) that is to be positioned inside a body and a proximal end (16) that is to be positioned outside a body, wherein in the region of the proximal end (16) an optics-carrier arrangement (28) with a movable optics-carrier (36) is positioned or can be positioned to have a path of motion (B) about the longitudinal axis of the device body, characterized in that that the optics carrier arrangement (28) comprises a guideway element (30) that carries the optics carrier (36), said guideway element having a guideway region (34) that can be positioned by means of pivoting about a swivel axis (S) in an operating position in the region of the proximal end (16) of the device body (12).

Abstract: An ultrasound flow measurement apparatus (10) for determining the flow rate of a fluid flowing in a line (12) is provided having at least one measurement path (18) at which a first ultrasonic transducer (16a) and a second ultrasonic transducer (16b) are arranged opposite one another with the flowing fluid between them, and having an evaluation unit that is configured to calculate the flow rate from a time of flight difference of ultrasonic pulses along the measurement path (18) in the direction with the flow (14) and against the flow (14). The ultrasonic transducers (16a-b) here are positioned such that a specific part pulse is isolated in time in a received signal of the respective receiving ultrasonic transducer (16a-b), with the part pulse corresponding to a direct sound, a reflected sound, an axially broken fluid sound, or an azimuthally broken fluid sound.

Abstract: An ultrasound flow measurement apparatus is provided having a plurality of ultrasonic transducers for determining the flow rate of a fluid flowing in a line, said ultrasound flow measurement apparatus having a plurality of measurement paths at which two respective ones of the ultrasonic transducers are arranged opposite one another with the flow being arranged therebetween and with a mutual axial spacing in the longitudinal direction of the line and having an evaluation unit that is configured to calculate the flow rate from time of flight differences of ultrasonic signals along the respective measurement paths in the direction with the flow and against the flow. The measurement paths have different axial offsets here.

Abstract: A trocar sleeve has a hollow shaft having a distal end and a proximal end, the shaft having a rectilinear shaft axis, an external thread rising from an outer surface of the shaft, wherein a first external thread having a shape of a helix has a height, measured from the outer surface up to a vertex of the helix, the height of the helix, seen along the rectilinear shaft axis from distal to proximal increases, and wherein a pitch of the helix, seen along the rectilinear shaft axis from distal to proximal decreases.

Abstract: The present invention relates to compounds of the formula (I) where C, D, A, m and n are as defined herein, and to their use in optoelectronic components and to optoelectronic components comprising them.

Abstract: A sealing device for a medical instrument includes a fastening area and a sealing area designed to either bear on the circumference of a medical instrument inserted into the sealing device or to close the sealing device when no medical instrument is inserted. The sealing device further includes a first elastic wall enclosing the sealing area in a ring shape, with an annular first edge, which is connected to the sealing area, and an annular second edge, and a second elastic wall which encloses the first wall in a ring shape and is spaced apart there from, with an annular first edge and an annular second edge, which is connected to the fastening area.

Abstract: A sealing means for sealing an introduction facility for a medical instrument includes a first sealing membrane of an elastic material with a first slit and a second sealing membrane of an elastic material with a second slit. The first sealing membrane and the second sealing membrane abut laminarily on each other. The first sealing membrane and the second sealing membrane are arranged such that the first slit and the second slit are not parallel with each other. Each of the first slit and the second slit is unbranched.