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  2. Door closer - Wikipedia

    en.wikipedia.org/wiki/Door_closer

    Spring hinge uses a spring mounted in a hinge and is integral to its design. The spring can be either visible or hidden within a tube and can be found more commonly on interior doors. When used on doors that open both ways they are known as double action spring hinges. Self-closing hinges are an alternative to using a door closer.

  3. Motion ratio - Wikipedia

    en.wikipedia.org/wiki/Motion_ratio

    The force in the spring is (roughly) the vertical force at the contact patch divided by the motion ratio, and the spring rate is the wheel rate divided by the motion ratio squared. I R = S p r i n g D i s p l a c e m e n t W h e e l D i s p l a c e m e n t . {\displaystyle IR={\frac {SpringDisplacement}{WheelDisplacement}}.}

  4. Concrete hinge - Wikipedia

    en.wikipedia.org/wiki/Concrete_hinge

    Concrete hinges are hinges produced out of concrete, with little or no steel in the hinge neck, which allows a rotation without a significant bending moment. [1] The high rotations [ 2 ] [ 3 ] result from controlled tensile cracks as well as creep.

  5. Hinge - Wikipedia

    en.wikipedia.org/wiki/Hinge

    An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.

  6. Compliant mechanism - Wikipedia

    en.wikipedia.org/wiki/Compliant_mechanism

    Compliant plier mechanism. In mechanical engineering, a compliant mechanism is a flexible mechanism that achieves force and motion transmission through elastic body deformation.

  7. Buckling spring - Wikipedia

    en.wikipedia.org/wiki/Buckling_spring

    A buckling spring is a type of keyswitch mechanism, popularized by IBM's keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It was used by IBM's Model F keyboards (for instance the AT keyboard ), and the more common Model M .