Patent ID: 8245353

Claim:
A hinge ( 1 ), comprising: a pivoting hinge leaf ( 2 ) and a fixed hinge leaf ( 3 ); a hollow hinge axle ( 7 ) common to said pivoting hinge leaf and said fixed hinge leaf; a first journal bearing and a second journal bearing, said first journal bearing includes a first journal bearing body, and, said second journal bearing includes a second journal bearing body; said hollow hinge axle includes an axis ( 4 ), said hollow hinge axle ( 7 ) connected unmovably to said pivoting hinge leaf ( 2 ) and mounted rotatably on said first and second journal bearings ( 5 - 1 , 5 - 2 ); said first journal bearing body of said first journal bearing and said second journal bearing body of said second journal bearing are rigidly connected with said fixed ( 3 ) hinge leaf; a spiral torsion spring ( 8 ) residing in said hollow hinge axle ( 7 ); said spiral torsion spring includes a first end ( 8 - 1 ) and a second end ( 8 - 2 ); said first ( 8 - 1 ) end of said spiral torsion spring ( 8 ) is connected unmovably to said hinge axle ( 7 ); a worm-gear unit includes a worm wheel ( 9 ) and an endless screw ( 6 ), said endless screw ( 6 ) resides in said first journal bearing body of said first journal bearing ( 5 - 1 ), and, said worm wheel includes teeth ( 9 - 10 ); said second ( 8 - 2 ) end of said spiral torsion spring is connected to said worm wheel; said endless screw ( 6 ) drives said worm wheel; said second ( 8 - 2 ) end of said spiral torsion spring ( 8 ) rotates with said worm wheel; said worm wheel ( 9 ) in said first journal bearing ( 5 - 1 ) rotates around said axis ( 4 ) of said hinge axle ( 7 ) and is unmovably fixed to said second ( 8 - 2 ) end of said spiral torsion spring ( 8 ); said teeth of said worm wheel interengage said endless screw ( 6 ), and, rotation of said endless screw rotatably drives said worm wheel ( 9 ) and said spiral torsion spring adjusting tension of said spiral torsion spring ( 8 ).