Abstract: A connector (5) for connecting to a standardized Luer Taper (15) or Luer-Lock connector includes a conical region (20) for contacting a conical connecting surface (25) of the standardized Luer Taper (15) or Luer-Lock connector, and a seal (45) disposed on the conical region (20).

Abstract: An elongate pinch housing is provided which is U-shaped in cross-section with two sidewalls and with a web wall connecting these. A pinch roller is longitudinally displaceable in these sidewalls with an annular notch at its one circumferential corner region for forming the regulation cross-section of the flexible tubing. The pinch housing in its transition region from the web wall to that sidewall which is distant from the annular notch of the pinch roller is provided with an inner, elongate side guide surface for the flexible tubing. The side guide surface projects into the pinch housing and runs inclined to its longitudinal middle plane so that the flexible tubing inserted in the pinch housing is subjected to a transverse movement.

Abstract: An elongate pinch housing is provided which is U-shaped in cross-section with two sidewalls and with a web wall connecting these. A pinch roller is longitudinally displaceable in these sidewalls with an annular notch at its one circumferential corner region for forming the regulation cross-section of the flexible tubing. The pinch housing in its transition region from the web wall to that sidewall which is distant from the annular notch of the pinch roller is provided with an inner, elongate side guide surface for the flexible tubing. The side guide surface projects into the pinch housing and runs inclined to its longitudinal middle plane so that the flexible tubing inserted in the pinch housing is subjected to a transverse movement.

Abstract: A nonreturn valve has a housing (1) provided with a central chamber (9) into which open an inlet channel (6) and an outlet channel (7) that may be separated by a sealing membrane (10) provided with a flow passage (18). The membrane (10) has a marginal part (16a) clamped in the housing (1), a central sealing part (16b) and a thinner annular wall (17) that links both parts (16a,16b). In order to obtain a nonreturn valve that has a reliable operation even at the smallest differential pressures, a central crater-like sealing formation (13,14), for example, is provided in the membrane (10). The inflow from the inlet channel (6) to the membrane (10) takes place outside the crater-like sealing structure (13,14) and the flow passage (18) of the membrane (10) is located within the crater-like sealing structure (13,14).

Abstract: A device for infusion or transfusion can be connected to a flexible tube line (16). The regulating arrangement (8, 9, 10, 12) for regulating the flow rate of the fluid through the flexible tube line (16) is a rigid structural member of the intravenous drip chamber (1) containing the infusion or transfusion liquid. The flow rate is regulated by means of a regulating nut (12) which effectively connects the regulating knob (10) with a flexible tube line (16). The structural member has a tubular connection piece (2) provided with a closed end (3) and having lateral perforations (4). The tubular connection piece (2) is coaxially spaced by a surrounding tubular threaded pipe (6) divided into segments (8, 9) separated by dividing points (7). The lateral perforations (4) open into downwardly directed grooves (5) which establish a flow path.

Abstract: A clamp for adjusting the throughflow cross-section of a tube, in particular for medical devices intended for once-only use, essentially comprises a U-shaped elongted clamp housing and a clamping roller longitudinally displaceable in the housing, as well as a clamping area angularly positioned with respect to the housing cross-piece, narrowing in the longitudinal direction of the housing and intended to establish the required throughflow cross-section of the tube. To prevent readjustment of a throughflow cross-section once this has been set, provision is made for the clamping area forming the throughflow cross-section of the tube to be formed by means of an annular notch at one edge of the clamping roller in conjunction with a housing sidewall, whilst forming a narrow acute-angled triangular cross-section which supports the tube on all sides.

Abstract: A multitube valve comprises a housing which has open front and rear ends with a plurality of channels defined between the front and rear ends each of a size to receive an individual tube therein and each including a support surface for the tube. A clamp in the form of a rotatable clamp roller has a journal extending outwardly from each side and it is engaged within respective clamp roller grooves which are defined in the housing on each side of the tube channels. The roller is movable by rotation along the grooves toward either the front or rear ends of the housing and it is of a size such that it cooperates with the support surface to compress the tubes therebetween and to at least partially close off the tubes when it is aligned over the support surface. The support surfaces are offset from each other in the longitudinal direction of the channels so that they operate at a separate time in respect to the positioning of the clamp for closing off the tube flow.

Abstract: A multitube valve comprises a housing which has open front and rear ends with a plurality of channels defined between the front and rear ends each of a size to receive an individual tube therein and each including a support surface for the tube. A clamp in the form of a rotatable clamp roller has a journal extending outwardly from each side and it is engaged within respective clamp roller grooves which are defined in the housing on each side of the tube channels. The roller is movable by rotation along the grooves toward either the front or rear ends of the housing and it is of a size such that it cooperates with the support surface to compress the tubes therebetween and to at least partially close off the tubes when it is aligned over the support surface. The support surfaces are offset from each other in the longitudinal direction of the channels so that they operate at a separate time in respect to the positioning of the clamp for closing off the tube flow.

Abstract: The drip chamber comprises a first part formed with a feed pipe or liquid duct terminating in a grooved tubular piercing needle at one end of the first part, the other end of the first part terminating in a bell-shaped cover. A second part of the drip chamber is constructed by a liquid chamber having one end engaged with the bell-shaped cover and the opposite end terminating in a hose or conduit. The bell and the liquid chamber are interconnected, at their junction with each other, by interengageable clampingly interlocking components forming, when interengaged, a labyrinth packing providing a liquid tight seal at the junction. The two parts are interconnected by a snap interfit of the interlocking components.

Abstract: A filter particularly for infusion and transfusion apparatus, comprises a housing having an inlet passage and a discharge passage spaced from the inlet passage. The housing includes a surface with a spiral flow passage defined thereon which is centrally communicated to the discharge passage. A filtering material is placed over the spiral in the housing which is made up of two parts which are interconnectable at the location of the spiral and which also act to hold the filter material in position. In an alternate embodiment, the housing of the filter is formed as a portion of a cannula. The inlet and outlet flow passages of the housing may be arranged to align axially, for example, on one side of the housing, or they may be offset.

Abstract: A piercing cannula of infusion and transfusion instruments, includes a housing having a lower liquid chamber defined therein and having an upper closure with an air opening on one side. A liquid member communicating with the interior of the housing extends outwardly through the closure directly alongside an aeration channel which has a lower end communicating with the opening. The housing includes a tubular portion defining an air inlet passage from the opening to the lower end of the aeration channel and a valve member is disposed between the liquid chamber and the lower end of the open aeration channel. The valve member comprises an upper inwardly tapered portion which is resiliently biased against the end of the tubular part defining the air passage.