Water shutoff valve

Claim 1

A shutoff valve for shutting off a fluid line in response to fluid flow through the line for a selected time intervals, said shutoff valve comprising: (a) a valve body open at each end and having an axial passage extending therethrough; (b) a normally open valve disk mounted in said axial passage to prevent fluid flow through the fluid line on closing of said valve disk; (c) valve actuator means for closing said valve disk in response to fluid flow through the fluid line; (d) a valve stem extending from said valve disk through said valve body and operatively connected to said actuator means, said valve stem further including an end pivotally received in a mating aperture formed in said valve body; (e) a drain outlet passage in said valve body for registry with another drain passage extending partially through said valve disk permitting fluid to drain from said fluid line upon closure of said valve disk; (f) sensing means supported by said valve body for sensing fluid flow through said axial passage, said sensing means producing an electrical signal indicative of the fluid flow; (g) timer means connected with said valve actuator means and said sensing means, said timer means being settable in a selected time interval for energizing said actuator means to close said valve disk on receipt of an encoded electrical signal from said sensing means indicating continuous fluid flow through said valve for the selected time interval; and (h) switch means connecting said valve via transformer means to a power source to provide electrical power.