Water spraying nozzle

Claim 1

In a water spraying nozzle including a tubular nozzle body which is provided with a water inlet at its rear end while closed at its front end, and a controlling sleeve into which said nozzle body is inserted and connected thereto, the improvement wherein: said nozzle body is provided with a first communication hole at its peripheral wall while closed at its front end to projectively form a controlling bar portion behind which is formed a first valve portion, a rear portion of said nozzle body being connected with a rear portion of said controlling sleeve so as to permit them to conduct an axial relative movement therebetween; said controlling sleeve is provided with an inner and an outer sleeve portions at its front portion to form an outer fluid path between said inner and said outer sleeve portions, while between said inner sleeve portion of said controlling sleeve and said peripheral wall of said nozzle body is formed an inner fluid path, said inner sleeve portion of said controlling sleeve being provided with a nozzle opening at its front end and a valve seat provided behind said nozzle opening together with a second communication hole provided at its peripheral wall behind said valve seat, in which nozzle opening is received an expanded head portion of said controlling bar portion of said nozzle body, which valve seat is provided at a position opposite to said first valve portion of said nozzle sleeve, while a second valve portion is provided between an outer peripheral surface of said nozzle body and an inner peripheral surface of said inner sleeve portion of said controlling sleeve; a porous plate is mounted in a front end opening of said controling sleeve, at least one of said controlling sleeve and said nozzle body being able to travel between a first position and a second position, in which first position said first valve portion of said nozzle body is abutted on said valve seat of said inner sleeve portion of said controlling sleeve to close a fluid path formed therebetween while said second valve portion shuts off a water flow between said first and second communication holes, in which second position said first valve portion of said nozzle body is separated from said valve seat of said inner sleeve portion of said controlled sleeve to open said fluid path formed therebetween while said second valve portion closes a fluid path formed between said first communication hole of said nozzle sleeve and said nozzle opening of said inner sleeve portion of said controlling sleeve, said first communication hole being fully opened together with said second communication hole of said inner sleeve portion of said controlling sleeve so as to be communicated with each other in said second position; a gripping sleeve is connected to the rear end of said controlling sleeve which is inserted into a sleeve-like element in front of said gripping sleeve, said sleeve-like element being provided with a spiral groove in its inner surface so as to keep said controlling sleeve not axially movable but rotatable, provided that said controlling sleeve is provided with an axially extending linear slot at a position corresponding to that of said spiral groove of said sleeve-like element and that a pin is provided in a peripheral surface of said nozzle body so as to be brought into a slidable contact with each of said spiral groove and said axially extending linear slot to permit said nozzle body to axially move relative to said controlling sleeve.