Valve for use in implantable infusion pumps

摘要

A valve includes a housing (11) having an inlet (10), an outlet (18) and a ram receiving chamber (20). A ram (12) has a first end and a second end and is slidably supported in the ram receiving chamber (20). The ram (12) has a central pin (30) on the second end of the ram. An actuating element (16) is connected to the ram. A plate (23) is fixedly connected to the housing. The plate has a central bore (24). The plate and the ram selectively abut to form a valve seat. The inlet is in fluid communication with the ram receiving chamber. The ram has an outer wall. Fluid communicates between a portion of the ram receiving chamber adjacent to the first end of the ram and a portion of the ram receiving chamber adjacent to the second end of the ram. In the closed position, the ram abuts with the plate. The pin protrudes through the central bore in the plate. In the open position, the actuating element displaces the ram such that the ram is spaced from the plate.