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Self-closing concealed hinge

  • US 4,177,540 A
  • Filed: 02/10/1978
  • Issued: 12/11/1979
  • Est. Priority Date: 02/10/1978
  • Status: Expired due to Term
First Claim
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1. A compact hinge assembly comprising door and frame wings mountable on said door and said frame, respectively, one of the wings having a housing including a pair of closely spaced parallel ear plates joined by a connecting bight and adapted to be concealed in a narrow elongate recess in the door, the ear plates having laterally extending securing plates, the other of the wings having a knuckle having an engageable ridge and disposed inbetween the ear plates and an arm connected to the knuckle at one end and having second securing plates at the opposite end, the arm fitting between the ear plates, a hinge pin pivotally interconnecting said knuckle and ear plates for relative swinging of said wings about a fixed axis defined by the axis of said hinge pin, a pressure element disposed in snug sliding relation between the ear plates, spring means biasing the pressure element substantially radially toward said hinge pin in all positions of said wings, and retaining means on the housing and engaging the remote side of the pressure element from the connecting bight to hold the pressure element against the connecting bight, whereby adjacent the closed position of the door the pressure element engages the ridge to urge the door to closed position.

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