Compact high pressure forward jetting spinning nozzle for cleaning

A nozzle assembly for use in cleaning materials from a surface, comprising:

• a generally tubular body having an axial bore and means on the rear end portion thereof for connecting said body to a tubular member through which liquid under pressure is supplied to said body, said body having an open front end;
• cylindrical rotor means mounted within said bore for limited axial movement therein, said rotor means having an axial passageway and front and rear walls;
• outwardly inclined and axially skewed nozzles in said front wall forming high velocity liquid sprays that create reaction forces which cause said rotor to spin in said bore and produce an outwardly diverging, conical spray pattern that dislodges material from the said surface;
• stop means engaging said front wall of said rotor means to maintain said wall rearward of said front end of said body;
• radial passage means in said rotor means;
• longitudinal passage means in said body outside said bore for communicating liquid under pressure to said radial passage means and to said axial passageway during spinning of said rotor means in said bore;
• means plugging said bore of said body rearward of said rotor means and providing an interior region between said plugging means and said rear wall of said rotor means;
• and clearance means between the exterior of rotor means and the surrounding surfaces of said bore through which liquid under pressure can flow into said region and provide a liquid bearing therein, the pressure of said liquid applying forwardly directed force to said rotor means.

A nozzle assembly adapted to spin in a surrounding body and produce a generally conical spray pattern, comprising:

• an outer tubular member forming said surrounding body;
• an inner tubular member mounted entirely within said surrounding body and having a front wall, a central bore, and radial port means for admitting water under pressure into said bore;
• at least one nozzle opening extending through said front wall and arranged in a manner such that water passing therethrough produces a reaction torque that causes said tubular member to spin in said body, said member having a rear portion;
• annular seat means in said rear portion;
• and spherical seal means engaging said seat means, said rear portion including means for retaining said seal means on said seat means.

A nozzle assembly for use in cleaning materials from a surface, comprising:

• a tubular body having a bore and adapted to be connected to a source of cleaning liquid under pressure;
• rotor means mounted within said bore and having front and rear walls and an axial flow passage;
• nozzle means extending through said front wall and arranged to create reaction forces in response to liquid flow which causes said rotor means to spin;
• passage means for communicating said axial flow passage with said liquid under pressure;
• and means forming a liquid bearing adjacent said rear wall of said rotor means during spinning of said rotor means;
• said body having a front end surface, said front wall of said rotor means being located rearward of said front end surface so that said surface prevents engagement of said front wall with material being cleaned from the surface .