Abstract: A urinary catheter includes a cannula having a urine passage, a urine inlet and a urine outlet; and a valve positioned in said urine passage between said inlet and said outlet and having a valve passage having at least a portion which is moveably positioned between a substantially blocked positioned and a flow position, and structure for moving said portion, said structure for moving being biased toward a blocking position wherein said portion is in said substantially blocked position and flow through said valve means is substantially blocked, and said structure for moving being moveable to a position at least partially moving said portion toward said flow position wherein flow through said valve means is allowed.

Abstract: A nail holding hammer includes a hammer head having a forward nail striking surface; and a nail holding structure for releasably holding a nail having a point, a head and a body portion therebetween wherein the nail holding structure holds the nail with the point facing forward, the nail holding structure including a notch for receiving the body portion and a striking anvil for contacting the head with the body portion in the notch.