Self closing internal hinge
View Patent ↗A self closing enclosed hinge is placed within the tubular structure of a gate. The inventive hidden hinge cannot physically smash fingers. An internal axle physically holds together a first gate hinge connector piece which receives the upper part of the gate, an upper stationary hinge piece, and a midsection outer tubular section, which contains a bushing and a spiral spring to return the gate to a closed position. This internal axle joins the lower stationary hinge piece with the second gate hinge connector piece. The second gate hinge connector piece receives lower part of workpiece gate.
1. 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.