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Hinge comprising a compression spring, which is adapted to balance the weight of a hinged leaf

  • US 4,236,272 A
  • Filed: 07/25/1978
  • Issued: 12/02/1980
  • Est. Priority Date: 07/27/1977
  • Status: Expired due to Term
First Claim
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1. A hinge for balancing the weight of a hinged leaf, such as a flap, lid or door, and for opposing a torque exerted on such leaf, said hinge comprising:

  • a stationary member having two limbs;

    a moveable hinge member connected to the hinged leaf;

    a control lever having a first portion pivotally connected to said stationary member and a second portion pivotally connected to said movable hinge member;

    a first cam slot formed in said stationary member;

    a second cam slot formed in said control lever and having a portion thereof overlapping said first cam slot during movement of said control lever;

    a slidable pin mounted for movement in said cam slots;

    spring means for balancing the weight of the hinged leaf comprisng a prestressed compression spring and a spring guide for said compression spring, said compression spring having one end bearing on said stationary member and one end bearing on said slidable pin, said spring guide having one end supported by said limbs of said stationary member and one end supported by said slidable pin;

    said first cam slot being shaped to control the force exerted by said compression spring, through said slidable pin and said control lever, on said movable hinge member.

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