Four Bar Chain
From DT Online

A Four Bar Chain is a linkage with four pivots, two of which are fixed - the bed or surface they are fixed to may be regarded as the fourth bar or link. Template:Secondary Mechanisms Template:Primary Mechanisms

A Four Bar Chain is a linkage with four pivots, two of which are fixed - the bed or surface they are fixed to may be regarded as the fourth bar or link. Template:Secondary Mechanisms Template:Primary Mechanisms