Abstract: A roller clamp cover is provided with which it is possible to maintain a set flow rate of a fluid flowing inside a medical tube to which a roller clamp is attached.

Abstract: A connector has a connection port closed by a sealing member. The connection port is attached to a first body portion which in turn is connected to a second body portion by an elastic bellows. When a Luer connector is withdrawn from the port, the bellows first extends and then retracts creating an overpressure within the connector.

Abstract: A connector, for example a Luer connector, has a sealing element such that when a connection is made to the connector, the sealing element is displaced into the connector, opening a fluid flow channel through the connector. The sealing member may include a slit on a lower surface thereof to ease the displacement of the sealing member.

Abstract: The present invention provides a closable male luer connector (101) in which an inner portion (121) within the spigot (111) of the connector is movable from a sealing position to an open position on connection of the connector to a female luer connector (10). The movement of the inner portion may be caused by, for example, action of the female connector on a projecting arm (122b) or a screw thread arrangement.

Abstract: A tube is arranged inside a downstream pipe in a fluid mixture delivery instrument and having an upstream pipe, downstream pipe and a merging pipe which are respectively connected to a chamber part, wherein the downstream pipe includes pressure parts for closing off the tube by the application of pressure and wherein two pressure parts are provided, one on either side of the tube and at one end of a rocking piece, the other end of which is supported outside a fluid mixture delivery instrument main body.

Abstract: A locking connector consists of a male luer part, a connecting support part provided at the rear end of the male luer part of which is connected to a tube, a lock ring supported on the connecting support part in a state in which it is prevented from being withdrawn from the tip end of the male luer part, guide protrusions extending from the tip end side to the rear end side of the connecting support part while steadily curving in the axial direction of the connecting support part and formed on the outer peripheral surface of the connecting support part, and recess parts allowing the entry of the guide protrusions formed on the inner peripheral surface of the lock ring, wherein when the guide protrusions are positioned inside the recess parts, the lock ring can be moved to the tube side from the connecting support part.

Abstract: A connecting structure for a connector in which a male-side connector and a merging pipe are connected by screwing together a female screw having protrusions formed on the inner peripheral surface of a lock ring and a male screw comprising protrusions formed on the outer peripheral surface of the merging pipe is provided with engaging recess parts on the female screw and engaging projections on the outer peripheral surface of the merging pipe which are able to engage with the engaging recess parts whereby when the male screw and the female screw are screwed together to reach an appropriate screwed state, the engaging protrusions engage with the engaging recess parts.

Abstract: A liquid coinjector is disclosed which includes a main body having an upstream pipe defining an inlet flow channel in fluid communication with a chamber portion of the body, a downstream pipe defining an outlet flow channel in fluid communication with the chamber portion, and a merging pipe in fluid communication with the chamber portion. A flexible tube supported is in the inlet flow channel of the upstream pipe. The flexible tube facilitates fluid flow from the upstream pipe to the chamber portion. At least one pressing part is positioned adjacent to the flexible tube. The at least one pressing part is movable from a first position to a second position to compress the flexible tube and close the inlet flow channel.

Abstract: A medical stopcock which allows easier switching operation of plural branch-tubes. The main body of the stopcock comprises a chamber part with a nearly spherical inner surface, and an upstream branch-tube, a downstream branch-tube and a merge-branch-tube all extending from the chamber part. A valve body of the stopcock comprises a nearly spherical valve main body and a rod-shaped operating part with a guide hole linking the inner surface of the chamber part to the outside. In operation, the rod-shaped operating part is moved along the guide hole through the use of the horizontal flow passages and the vertical flow passage to allow the predetermined branch-tubes out of the upstream branch-tube, the downstream branch-tube and the merge-branch-tube to communicate with one another or to shut-off the communication.

Abstract: Certain embodiments of the present invention include a male luer connector having a valve arrangement for keeping a passage that extends through the male luer connector closed when the male luer connector is not attached to a corresponding female luer connector. This passage of the male luer connector may opened by connecting the male luer connector to a female luer connector. The valve arrangement of the male luer connector may include a movable sealing element arranged around a central fluid conduit. In some embodiments, the male luer connector may include a filter that is permeable to gas, but substantially impermeable to liquid, thus allowing gas to be purged from the male luer connector while substantially preventing liquid from leaking from the connector at least when the male luer connector is not connected to a female luer connector.

Abstract: A liquid co-injection apparatus comprising a high-pressure resistant rubber plug capable of obstructing a slit when the chamber is under a high hydraulic pressure. The main body of the liquid co-injection apparatus comprises a chamber part, a downstream branch-tube extending from the chamber part in different directions, an upstream branch-tube, and a connection opening with an attached lid. A rubber plug is attached to the inside of the lid to allow obstruction of the lid when the slit of the rubber plug is closed, and to allow communication between the insides of the chamber part and the connecting tube when the connecting tube is inserted into the slit. Moreover, a rib is provided on the outer peripheral surface of the rubber plug to allow the rubber plug to be strongly drawn and pressed onto the inner peripheral surface of the lid member, further securing the obstruction of the slit.

Abstract: A cap for a connector which can fill a male luer connector with only a fluid, such as a medicinal fluid, without leaving gas in the male luer connector. The cap for the connector comprises the cap body, the sliding part movable relative to the cap body, and the air filter placed at the tip end opening of the gas flow path forming part included in the sliding part. Also, the cap body comprises the cylindrical fitting part for liquid tightly fitting with the tip end opening of the male luer connector, and the cylindrical guide provided with the liquid outlet on its peripheral surface. Further, the liquid outlet can be opened or closed by shifting the gas flow path forming part within the cylindrical guide. Moreover, the cylindrical guide is placed within the recess portion to be guided between the gas flow path forming part and the containing wall.

Abstract: A medical valve device includes a valve unit. The valve unit includes two fluid channels and is positionable to selectably connect two inlet ports and an outlet port such that in one position, fluid introduced at a first inlet port is caused to flow in a first fluid channel to a second inlet port and thence in a second fluid channel from said second inlet port to said outlet port.

Abstract: A male luer connector to prevent generation of bacteria and waste of medicinal liquid. The male luer connector comprises a basal end and a tip end rotatable relative to the basal end; the male luer part is tapered and rotatable within the tip end. The outer peripheral surface of the tip end is decreased from the rear side to the front side; and a stick-like male luer occluding portion is provided within the male luer part which can tightly occlude liquid from the tip end opening of the male luer part. An internal thread portion is provided on the inner peripheral surface of the basal end and an external thread, helically engaged with the internal thread, is provided to the rear end portion of the male lure, whereby the tip end opening can be opened or closed by rotating the tip end relative to the basal end.

Abstract: The present invention provides a liquid coinfusion unit that can prevent backflow. The coinfusion unit incorporates a closure mechanism (21a, 21b) for closing a fluid connection to an inlet port (14) while maintaining a fluid connection between a mixing port and an outlet port (13), thereby preventing the backflow of a medicinal liquid through the inlet port. Operation of a manipulating element (22a, 22b) by a user causes the closure mechanism to obstruct a fluid flow channel from the inlet port (14) and on release of the manipulating element, the closure mechanism returns to a fluid flow configuration.

Abstract: The invention is directed to a connection structure that can minimize the formation of cracks of a connector or leakage of liquid. In the structure, a female thread (34) formed on the inner peripheral surface of lock ring (28) in a male connector (22) engages a male thread (25) on the outer peripheral surface of a female connector (21) when the male connector and the female connector are screwed to each other. Further, protrusion strips (26a), (26b) are formed on the rear side portion of the male thread on the outer peripheral surface of female connector, and notches (35a), (35b) that can engage with said protrusion strips are set on the tip portion of lock ring (28). As a result, when the male thread and the female thread are screwed to each other, the screwed state is appropriate when protrusion strips and notches are engaged with each other.

Abstract: A connector for switching communication-to-interception states between liquid transfusion tubes. The connector comprises a connector body, a seal member, and a valve with an improved sealing which limits contact with air and minimizes generation of bacteria during medical use.

Abstract: The invention is directed to a fluid mixture delivery instrument which excludes entry of air during fluid delivery. The instrument has a main chamber part and a plurality of branch pipes which extend in different directions from the chamber part. The branch pipes are configured with slitted rubber stoppers with closures to which connection tubes can be inserted for the delivery of fluid with exclusion of air.

Abstract: A luer-locking fitting connection mechanism is structured with a female connector and male connector. It thus becomes possible to connect male connector to female connector by screwing the female threads formed on the internal circumferential surface of luer-locking fitting member attached to male connector to the male threads formed on the external circumferential surface of female connector. Provision is also made for an engagement projection to be provided on the base of male threads on the external circumferential surface of female connector, and for passive engagement member, that can engage with engagement projection, to be provided on the tip of female threads on the internal circumferential surface of luer-locking fitting member. Thus, when male threads and female threads are screwed together in a suitable condition, the engagement projection and passive engagement member engage with each other.

Abstract: A roller clamp is configured to maintain at a prescribed rate the flow rate of a fluid that flows through a tube. The roller clamp includes a tube winding shaft part around which a fluid flow tube is passed and which prevents the setting of the flow rate being disturbed if the tube is subject to a tensional force.