Patent ID: 8621712

Claim:
A self-closing internal hinge ( 100 ) comprising: A. an internal axle ( 101 L); said internal axle ( 101 L) has a secant cut ( 109 ), a first end ( 103 ) with a flat plate ( 105 ), and a second end ( 111 ) with a tapped hole ( 113 ); said flat plate ( 105 ) has a hole ( 107 ); B. a first gate-hinge connector piece ( 115 A) which has a cylindrical hollow core ( 117 ) and an axle passage ( 121 ); said cylindrical hollow core ( 117 ) receives said flat plate ( 105 ); and said connector piece axle passage ( 121 ) receives said internal axle ( 101 L); C. a first washer ( 131 B) which has axle passage hole ( 132 ) which receives said internal axle ( 101 L); D. a first stationary hinge part ( 123 C) has a spring end inlet ( 129 ), an affixment penetration ( 126 ), and a central tunnel ( 125 ) which receives said internal axle ( 101 L); E. a washer ( 133 D) with a smaller hole ( 167 ) and an axle passage hole ( 165 ) which receives said internal axle ( 101 L); F. a spiral spring ( 135 E) with a first straight end ( 137 ) and a second straight end ( 139 ); said first straight end ( 137 ) passes through said smaller hole ( 167 ) and is placed into said spring end inlet ( 129 ) of said first stationary hinge part ( 123 C); said internal axle ( 101 L) passes through said spiral spring ( 135 E); G. a bushing ( 141 F) has a tapped hole ( 149 ) and lower spring inlet ( 143 ); said lower spring inlet ( 143 ) receives said second straight end ( 139 ) of said spiral spring ( 135 E); and a bushing axle passage ( 146 ) which receives said internal axle ( 101 L); H. an outer tubular midsection ( 307 G) with a passage hole ( 311 ) having an upper volume ( 306 ) and a lower volume ( 308 ); said spiral spring ( 135 E) is received in said upper volume ( 306 ); said bushing ( 141 F) is affixed in said lower volume ( 308 ) by a secant screw ( 310 M) passing first through said passage hole ( 311 ) and threaded into said tapped hole ( 149 ) of said bushing ( 141 F) and urged into said secant cut ( 109 ) of said internal axle ( 101 L); I. a second washer ( 131 H) which has a hole ( 132 ) which receives said internal axle ( 101 L); J. a second stationary part ( 151 I) has an affixment penetration ( 126 ) and a central tunnel ( 153 ) which receives said internal axle ( 101 L); K. a third washer ( 131 J) which has a hole ( 132 ) which receives said internal axle ( 101 L); L. a second gate rotating connector piece ( 115 K) which has an axle passage ( 121 ) which receives said internal axle ( 101 L); and a second gate rotating connector piece cylindrical hollow core ( 117 ) which receives said second end ( 111 ) of said axle ( 101 L); said second end ( 111 ) with said tapped hole ( 113 ) receives cap screw ( 112 ); said screw cap ( 112 ) retains said self-closing internal hinge ( 100 ) as a unit.