Abstract: Apparatus for switching a fluid stream, either gaseous or liquid, between a first path and a second path is disclosed. A pair of enclosures are formed by two depressions in a first plate (each depression having an inlet and an outlet) and an elastomeric diaphragm covering the depressions. The diaphragm is held in place by a second plate having a first control inlet opposite one depression and a second control inlet opposite the other depression. A fluid to be switched is connected into the inlets of the first plate in common. By alternately applying a control fluid to one control inlet and then the other of the second plate, the fluid to be switched is switched from one outlet to the other by the diaphragm alternately being deformed into one depression and then the other by the control fluid so as to seal the inlet and outlet and, thereby, block the flow of fluid therethrough from the inlet to the outlet.

Abstract: A device for inflating tennis balls having a sharpened needle which punctures the wall of the ball which needle inserts both air and a sealant material. A sharpened needle is held by a frame, the needle being hollow to permit passage of air and sealant material. A hollow conduit is affixed to the needle and a pressure sensitive member is positioned in the hollow conduit. Air and a ball sealant is pumped through the hollow conduit into the tennis ball. After all the sealant has been injected additional air is injected in an amount to cause the pressure inside the ball to exceed the desired pre-set pressure. Excess air is removed from the ball through the hollow needle and through a pressure sensitive member until the desired pre-set pressure inside the ball is attained.