Sprayer

Claim 1

A sprayer for liquids comprising a sprayer control body of generally tubular form and having an inlet end with a first interior bore terminating at an interior shoulder and a delivery end with a second interior bore extending from said shoulder, a connection to a source of liquid under pressure to be dispensed and connected to the inlet end of said body, a spool fixedly mounted in said body and extending from said shoulder toward said outlet, a nozzle nut carried on said delivery end of said body, a valve plunger movable in said body, a spring urging said plunger in one direction, a member for moving said plunger against the force of said spring, said spool and said valve plunger having portions providing a restricted discharge passageway for atomization of liquid delivered therefrom, said body and said plunger defining first liquid passageways, said plunger and said spool defining second liquid passageways communicating with said first passageways for delivery of liquid to and through said discharge passageway, a first flow control member interposed between said spool and said plunger member and upstream of said discharge passageway cutting off liquid flow through said passageways in one position of said plunger, an additional pressure fluid supply connection on said body for gas under pressure, said body and said spool having portions defining fluid passageways for delivery of said gas from said additional supply connection, said nozzle nut and said spool having portions providing a restricted discharge passageway to which said last mentioned fluid passageways are connected for discharge to gas contiguous to said liquid discharge passageway, and a second flow control member interposed between said body and said plunger for cutting off gas delivery in said one position of said plunger.