Nozzle

Abstract

A nozzle includes a ring, a tube, a piston and a sheath. The ring includes an upper portion and a lower portion. The tube extends in the ring. The piston is connected to the tube and partially located out of the ring. The sheath is made of metal and includes a first annular flange at an end and a second annular flange at another end. The sheath is arranged around the ring. The first annular flange is placed against the upper portion of the ring and the second annular flange is placed against lower portion of the ring when sheath is provided around the ring. Thus, the sheath is kept on the ring without the use of any adhesive.

1 . A nozzle comprising:
 a ring comprising an upper portion and a lower portion;   a tube extending in the ring;   a piston connected to the tube and partially located out of the ring;   a sheath made of metal and comprising:
 a first annular flange formed at an end and placed against the upper portion of the ring; and 
 a second annular flange formed at another end and placed against the lower portion of the ring thus keeping the sheath on the ring without having to use any adhesive and preventing the sheath from cutting a user. 
   
     
     
         2 . The nozzle according to  claim 1 , wherein the first annular flange of the sheath is a bent portion at an angle of 90° to 120°. 
     
     
         3 . The nozzle according to  claim 1 , wherein second annular flange of the sheath is a bent portion at an angle of 90° to 120°. 
     
     
         4 . The nozzle according to  claim 1 , wherein the ring further comprises a skid-proof device formed on an external side of the ring, wherein the sheath comprises a pattern engaged with the skid-proof device to prevent the sheath from rotation relative to the ring. 
     
     
         5 . A nozzle comprising:
 a ring comprising a lower portion, an upper portion and an annular wall extending from the upper portion;   a tube extending in the ring;   a piston connected to the tube and partially located out of the ring;   a sheath made of metal and comprising:
 a first annular flange formed at an end and placed against the annular wall; and 
 a second annular flange formed at another end and placed against the lower portion of the ring thus keeping the sheath on the ring without having to use any adhesive and preventing the sheath from cutting a user. 
   
     
     
         6 . The nozzle according to  claim 5 , wherein the first annular flange of the sheath is a bent portion at an angle of 90° to 120°. 
     
     
         7 . The nozzle according to  claim 5 , wherein second annular flange of the sheath is a bent portion at an angle of 90° to 120°. 
     
     
         8 . The nozzle according to  claim 5 , wherein the ring further comprises a skid-proof device formed on an external side of the ring, wherein the sheath comprises a pattern engaged with the skid-proof device to prevent the sheath from rotation relative to the ring. 
     
     
         9 . A nozzle comprising:
 a ring comprising a lower portion, an upper portion and an annular wall extending from the upper portion;   a tube extending in the ring;   a piston connected to the tube and partially located out of the ring;   a sheath made of metal and comprising:
 a slender section provided around the annular wall; 
 a wide section provided around the ring; 
 a shoulder formed between the wide section and the slender section and provided around a portion of the ring between the annular wall and the upper portion of the ring; 
 a first annular flange formed at an end of the slender section and placed against the annular wall; and 
 a second annular flange formed at an end of the wide section and placed against the lower portion of the ring thus keeping the sheath on the ring without having to use any adhesive and preventing the sheath from cutting a user. 
   
     
     
         10 . The nozzle according to  claim 9 , wherein the first annular flange of the sheath is a bent portion at an angle of 90° to 120°. 
     
     
         11 . The nozzle according to  claim 9 , wherein second annular flange of the sheath is a bent portion at an angle of 90° to 120°. 
     
     
         12 . The nozzle according to  claim 9 , wherein the ring further comprises a skid-proof device formed on an external side of the ring, wherein the sheath comprises a pattern engaged with the skid-proof device to prevent the sheath from rotation relative to the ring.