Scissor mechanism in particular for lift tables

Claim 1

In a scissor mechanism for lift tables having two scissor arms which are pivotably journalled in a common bearing and having a driving member which is coupled between an engagement element on one of said scissor arms and an engagement element on the other of said scissor arms, said engagement elements being offset from the common bearing such that the angle between the scissor arms may be changed, as long as the scissor arms are not parallel to one another, by changing the length of the driving member, and wherein the engagement element on a first one of the scissor arms may be displaced along the arm and is connected to a two segment wedge mechanism located between the scissor arms, said wedge mechanism comprising a pressure wedge and a pressure roller, and wherein one of the segments of the wedge mechanism is connected to the displaceable engagement element and the other segment of the wedge mechanism is fixedly mounted on the other scissor arm such that the scissor arms, when parallel to one another, may be swung out of a parallel relationship by means of wedging action in the wedge mechanism created by displacing the displaceable engagement element, the improvement comprising the displaceable engagement element comprising a displaceable sleeve which surrounds the first scissor arm and is connected with the driving member by a pivotable link.