Patent ID: 7934290

Claim:
A fulcrum type door hinge permitting movement of a door between horizontal open and vertical closed positions relative to a structure, comprising (a) a first member adapted for mounting to the door; (b) a second member adapted for mounting to the structure; (c) a first balancing arm connected with said second member via a first fixed pivot connection; (d) a second balancing arm connected at one end with said second member via a second fixed pivot, said first fixed pivot being arranged above and within the structure relative to the second fixed pivot; (e) a first arm having one end connected with an end of said first balancing arm opposite said first fixed pivot via a first mobile pivot and a second end connected with said first member via a second mobile pivot, said second balancing arm being connected at another end with said first member via a third mobile pivot; and (f) a second arm connected between said first balancing device and said second balancing device via first and second binding pivots, respectively, said first mobile pivot being arranged above and between said first and second fixed pivots when the door is in the closed position, said second mobile pivot being arranged above and more external than said third mobile pivot relative to the structure, said second and third mobile pivots being arranged below and external to said second fixed pivot, said first and second binding pivots being arranged between said first and second fixed pivots, said first binding pivot being arranged at least as high as said first fixed pivot, said second binding pivot being arranged at or below the height of said second fixed pivot.