Self-closing butt hinge

Claim 2

A butt hinge comprising a hinge pin, first and second substantially flat mounting wings each having an ear received on said pin, said first wing being swingable about the axis of said pin and relative to said second wing from a predetermined position in which said wings are disposed in face-to-face relationship to another position in which the wings are disposed out of face-to-face relationship, a pressure member mounted on one of said wings and located in the gap between the opposing faces of said wings when said first wing is in said predetermined position, a spring mounted on said one wing and urging said pressure member edgewise of said one wing and toward said pin to bias said first wing to said predetermined position, and an opening formed in the other one of said wings and located to receive at least part of said pressure member when said first wing is in said predetermined position whereby said wings are positioned closely together when disposed in face-to-face relationship.

Claim 3

A butt hinge for connecting a door for swinging between open and closed positions relative to a frame, said door and frame each having an outer face surface and a generally perpendicular edge surface, said face surfaces being disposed in generally the same plane and said edge surfaces facing one another when said door is in said closed position, said hinge comprising substantially flat door and frame wings mountable on the edge surfaces of said door and frame, respectively, and each having an ear, a hinge pin interconnecting said ears to mount said wings for relative swinging and adapted to be located outwardly of said face surfaces, said wings being disposed in face-to-face relationship when said door is in said closed position and being disposed out of face-to-face relationship when said door is in said open position, a pressure member mounted slidably on one of said wings and having one side facing the respective edge surface, said pressure member being located in the gap between the opposing faces of said wings when the latter are in face-to-face relatioNship, a spring supported on said one wing and urging said pressure member to slide edgewise of said one wing and toward said pin to bias said door to said closed position, and an opening formed in the other of said wings and locate to receive the opposite side of said pressure member when said door is in said closed position whereby said wings are located in closely spaced face-to-face relationship when said door is in said closed position.

Claim 4

A butt hinge for connecting a door for swinging between open and closed positions relative to a frame, said door and frame each having an outer face surface and a generally perpendicular edge surface, said face surfaces being disposed in generally the same plane and said edge surfaces facing one another when said door is in said closed position, said hinge comprising substantially flat door and frame wings mountable on the edge surfaces of said door and frame, respectively, and each having an ear, a hinge pin interconnecting said ears to mount said wings for relative swinging and adapted to be located outwardly of said face surfaces, said wings being disposed in face-to-face relationship when said door is in said closed position and being disposed out of face-to-face relationship when said door is in said open position, a pressure member mounted slidably on one of said wings and having one side facing the respective edge surface, said pressure member being located in the gap between the opposing faces of said wings when the latter are in face-to-face relatioNship, a spring supported on said one wing and urging said pressure member to slide edgewise of said one wing and toward said pin to bias said door to said closed position, and an opening formed in the other of said wings and locate to receive the opposite side of said pressure member when said door is in said closed position whereby said wings are located in closely spaced face-to-face relationship when said door is in said closed position.

Claim 5

A butt hinge as defined in claim 2 further including an opening formed in said one wing for receiving said one side of said pressure member whereby the latter is nested within said two openings when said door is in said closed position.