Extendable billiard cue

Abstract

An extendable billiard cue is disclosed to include a shaft, a butt detachably fastened to the shaft, a sleeve, which is embedded in the butt remote from the shaft and has two positioning devices near the two distal ends, a pull bar, and a stem, which has one end fixedly connected to the pull bar and the other end axially movably inserted into the sleeve and fixedly provided with a positioning device selectively engageable to one of the positioning devices of the sleeve to lock the billiard cue in the extended (first length) position or received (second length) position. After disconnection of the shaft from the butt, the detached billiard cue is receivable in a cue bag.

1 . An extendable billiard cue comprising: 
 a cue body comprising a butt and a shaft, said butt having a longitudinal chamber axially extending to one end thereof remote from said shaft;    a sleeve fixedly mounted inside the longitudinal chamber of said butt, said sleeve having a front positioning device near a front end thereof and a rear positioning device near a rear end thereof;    a pull bar, said pull bar having a locating hole at one end thereof; and    a stem inserted into said sleeve and movable in and out of said sleeve between an extended position and a received position, said stem having a front end fixedly fastened to the locating hole of said pull bar and a positioning device fixedly provided at a rear end thereof, the positioning device of said stem selectively engageable to the front positioning device and rear positioning device of said sleeve to lock said stem to said sleeve in one of said extended position and said received position.    
   
   
       2 . The extendable billiard cue as claimed in  claim 1 , further comprising a locating block fixedly mounted in said locating hole of said pull bar and adapted to affix said stem to said pull bar.  
   
   
       3 . The extendable billiard cue as claimed in  claim 2 , wherein said locating block has a screw hole.  
   
   
       4 . The extendable billiard cue as claimed in  claim 1 , further comprising a spring member mounted in said sleeve.  
   
   
       5 . The extendable billiard cue as claimed in  claim 1 , wherein said stem has an index for position indication.  
   
   
       6 . The extendable billiard cue as claimed in  claim 1 , wherein said pull bar has an index for angular indication; said butt has another index corresponding to the index of said pull bar for angular indication.  
   
   
       7 . The extendable billiard cue as claimed in  claim 1 , wherein the positioning device of said stem comprises at least one stop block protruded from the periphery thereof.  
   
   
       8 . The extendable billiard cue as claimed in  claim 1 , wherein the front positioning device and rear positioning device of said sleeve each comprise at least two inside flanges inwardly protruding from an inside wall thereof.