Abstract: A device for metering the flow of a liquid medium passing therethrough comprises a plastic stem member having a cylindrical metering drum element projecting into and rotatively engaged in liquid tight relation with the cylindrical wall of a bore chamber in a body member to rotatively mount the stem member therein. A diametrically slotted headed stud projecting endwise from the drum element is contracted and inserted through a bore opening in the end wall of the chamber in the body member to cause the head end of the stud to snap-lock behind the chamber end wall and thus secure the stem and body members together in assembled rotative relation.

Abstract: A device for controlling the flow of a liquid medium passed therethrough comprises a cup-shaped plastic body member having a bottom end wall with a bore opening and a side wall forming with the bottom end wall a chamber through which the liquid medium is passed. A plastic stem member is journaled in the bore opening of the body member to rotatably mount the stem member thereon. The stem member overlies and closes off the open top end of the chamber and has a flow control element located within the chamber for controlling the flow rate of the liquid medium therethrough, as determined by the selected relative rotative position of the member. The stem member is snap-locked in assembled relation with the body member, and the two members are provided with actuating arm means including a radially outward projecting lever arm on the stem member for rotating the members relative to one another.

Abstract: A flow regulating valve device providing continuous flushing of intravascular catheters with a flushing solution at either a restricted normal slow flow rate or intermittently at a catheter flush-out fast flow rate. The valve device has a cylindrical drum element rotatably mounted within a cylindrical chamber of a body member and provided with a diametrical flow-restricting capillary passage and a circumferentially extending, arcuate groove fast flow bypass passageway which are selectively moved into respective flow controlling positions by rotative adjustment of the drum element within the chamber. Biasing spring means on the device normally bias and maintain the body and stem members in their restricted flow rate relative rotative position while actuating arm means on these members enable manual rotative displacement thereof to their fast flow relative rotative position.