Patent ID: 7775539

Claim:
A quick-release coupling device comprising: a. a first structural member ( 14 ) having two ends wherein an outer surface of a lower end includes a substantially annular ring with a circumferential upward facing channel axially fixed to said lower end and an upper end of said structural member having a plurality of radially outward tapered wedge protrusions ( 15 ); b. a second structural member including a sleeve member ( 19 ) attached at one end, said sleeve member having an inner cylindrical surface for contacting said outside surface of said first structural member and wherein a lower end of said sleeve member having an inward taper and an upper end of said sleeve member having a radially outward protruding flange ( 16 ); c. a rotatable locking ring having a radially outward helical retaining groove; i. said inward taper is inserted into said annular ring with said wedge protrusions rested on a top surface of said flange ( 16 ); ii. wherein said locking ring slidingly coupled to said upper end thereto for positively engaging/locking said flange and wedge protrusions.