Hollow dumbbell

Abstract

A hollow dumbbell includes left and right shells which are detachably connected to left and right coupling ends of a neck member. Each shell includes a shell body defining an accommodation chamber therein for containing liquid so as to increase the weight of the dumbbell, and a tubular portion defining an access port that provides access to the accommodation chamber. The access port is closed by the respective coupling end of the neck member. A light-related brightening member is disposed in one of the shells and the neck member for illumination and embellishment.

1 . A hollow dumbbell adapted to be filled with liquid therein for increasing weight thereof, said dumbbell comprising: 
 left and right shells, each including a shell body which defines an accommodation chamber adapted for containing the liquid therein, and a tubular portion which extends along a longitudinal axis from said shell body and which defines an access port that provides access to said accommodation chamber;    a neck member which is elongated along the longitudinal axis, and which has left and right coupling ends opposite to each other along the longitudinal axis;    a left fastening member disposed to detachably connect said tubular portion of said left shell to said left coupling end so as to close said access port in said tubular portion of said left shell;    a right fastening member disposed to detachably connect said tubular portion of said right shell to said right coupling end so as to close said access port in said tubular portion of said right shell; and    a light-related brightening member disposed in one of said left and right shells and said neck member.    
   
   
       2 . The hollow dumbbell of  claim 1 , wherein each of said left and right fastening members includes an internally threaded surface and an externally threaded surface which are formed on said tubular portion of a respective one of said left and right shells and a respective one of said left and right coupling ends, respectively, and which surround the longitudinal axis to threadedly engage each other so as to connect the respective one of said left and right coupling ends to said tubular portion of a respective one of said left and right shells.  
   
   
       3 . The hollow dumbbell of  claim 2 , wherein each of said left and right fastening members further includes a water-tight ring disposed to establish a water-tight engagement between said externally and internally threaded surfaces.  
   
   
       4 . The hollow dumbbell of  claim 1 , wherein said neck member defines a passage therein which extends along the longitudinal axis and which has two ends that are respectively disposed in said left and right coupling ends and that are in fluid communication with said accommodation chambers in said left and right shells, respectively.  
   
   
       5 . The hollow dumbbell of  claim 4 , wherein said left and right shells and said neck member are made from a transparent material having a fluorescent substance incorporated therein.  
   
   
       6 . The hollow dumbbell of  claim 1 , wherein said neck member is made from a metal material, said dumbbell further comprising a flexible strap fastened around said neck member to facilitate gripping.  
   
   
       7 . The hollow dumbbell of  claim 1 , wherein said light-related brightening member includes a battery-powered lighting body which is disposed on one of said shell bodies of said left and right shells and said neck member.  
   
   
       8 . The hollow dumbbell of  claim 7 , wherein said light-related brightening member further includes a plurality of fluorescent bodies which are disposed in a respective one of said accommodation chambers and said passage and which are adapted to scatter in the liquid.  
   
   
       9 . The hollow dumbbell of  claim 1 , wherein said shell bodies of said left and right shells are patterned.