Patent ID: 8082629

Claim:
A parallelogram hinge for vertical movement doors, said parallelogram hinge comprising a first plate for fastening to a furniture flank, a second plate designed for fastening to a door, an upper arm and a lower arm pivotally mounted between the first plate and the second plate to form an articulated parallelogram along with the first plate and the second plate, the upper arm extending substantially parallel to the lower arm, a movement-balancing spring linked between the first plate and the upper arm, the movement-balancing spring being connected to the upper arm at a pivot point located at an intermediate position between hinged extremities of the upper arm to the first plate and the second plate and being connected to the first plate at a point below a pivot point of the lower arm on the first plate, the upper arm, the lower arm and the movement-balancing spring being connected to the first plate at respective pivot points, the respective pivot points being aligned with each other along a linear line in a plane on the first plate, the pivot point of the movement-balancing spring on the upper arm being on one side of the linear line in an open position of the movement-balancing spring and the pivot point of the movement-balancing spring on the upper arm being on an opposite side of the linear line in a closed position of the movement-balancing spring, in the closed position of the movement-balancing spring, a depth of the movement-balancing spring being reduced to a width of the upper arm and the lower arm.