Patent Publication Number: US-2003223222-A1

Title: Structure to emit colorful light from an exhaust pipe

Description:
FIELD OF THE INVENTION  
       [0001] This invention relates to an exhaust pipe, and more particularly to an exhaust pipe has prearranged with holes and slots to produce turbulence when exhaust gas expelled from the pipe and with the arrangement of LEDs to emit multi-colorful light.  
       BACKGROUND OF THE INVENTION  
       [0002] There is a prior exhaust pipe, which can emit light to attract consumers&#39; attention. This design comprises an inner tube secured to one end of the exhaust pipe with an outer tube connected to the inner tube, the outer tube comprises neon lamps attached thereto and separated from the inner tube to form a gap there between as a waist gas passage, thus when air flows through the passage, the projection light forms neon light beaming.  
       [0003] However, this design of installing the neon lamps is complicated and to place the neon lamps is extremely dangerous and easy to be broken.  
       SUMMARY OF THE INVENTION  
       [0004] It is the primary object to provide a structure to emit colorful light from an exhaust pipe, which emits colorful light in varies shapes that is more attractive to customers.  
       [0005] It is another object of the present invention to provide a structure to emit colorful light from an exhaust pipe, which is easy to install.  
       [0006] It is a further object of the present invention to provide a structure to emit colorful light from an exhaust pipe, which is safe in use and the lamps are more protected. 
     
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
     [0007]FIG. 1 is a perspective view of the present invention;  
     [0008]FIG. 2 is a side sectional view of FIG. 1, partially sectioned; and  
     [0009]FIG. 3 is another side sectional view of the present invention.  
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
     [0010] A structure to emit colorful light from an exhaust pipe of the present invention, as shown in FIG. 1, comprises an inner tube  1 , an outer tube rear section  2 , an outer tube front section  3 , an annular circuit board  4 , LEDs  5 , a retaining ring  6 , an isolating sleeve  7 , and water proof glue  8 .  
     [0011] The inner tube  1  has a fixture  11  at its outer surface adapted to secure inside of the outer tube rear section  2 .  
     [0012] The outer tube rear section  2  has one end secured to the outer tube front section  3  by means of rivets  21 , the outer tube rear section  2  comprises a plurality of slots  22  around the periphery and a reduced end with holes  23  thereon.  
     [0013] The outer tube front section  3  has a reduced end forming a step  31  in the inner portion of the reduced end to engage the annular circuit board  4  thereto. At the front end close to the step  31  is a groove  32  adapted to receive the annular circuit board  4  therein and secured by the retaining ring  6 . The front end of the outer tube front section  3  has a hole  33  for the isolating sleeve  7 .  
     [0014] The annular circuit board  4  comprises a number of LEDs  5  thereon connected with an electric wire  41  sleeved into the isolating sleeve  7 , as shown in FIG. 2. The connecting area between the annular circuit board  4  and the step  31  of the outer tube front section  3  is glued with water-proof glue  8 .  
     [0015] With the above arrangement, there is a gap between the annular circuit board  4  on the outer tube front section  3  and the inner tube  1 , which is treated as air passage.  
     [0016] The air flows into the slots  23  of the outer tube rear section  2  and comes out from the holes  23  of the outer tube rear section  2 , which is mixed with the waste gas expelled from the inner tuber  11  to produce turbulence, which produces various colorful light when lit by the LEDs  5 .