Valve means with fluid retraction means

摘要

A combined trumpet valve and reed valve serve to control the flow of fluid into a conduit and is particularly adapted for lens cleaning apparatus for flowing water over the lens or lens cover in an endoscope with viewing mechanism and is capable of retracting the trapped fluid in the conduit to prevent it from dripping into the area being viewed and removing any residual fluid that is left on the lens when the valve is positioned to the closed position.