Four Bar Linkages – Hoekens Linkage – 51011
The Hoekens linkage is a four-bar mechanism that converts rotational motion to approximate straight-line motion with approximate constant velocity. The precise design trades off straightness, lack of acceleration, and what proportion of the driving rotation is spent in the linear portion of the full curve.
Four-Bar Hoekens Linkage Animation
Warning : Flash Animation May not Work on Some Browsers and Mobile Platforms !
Youtube Video: http://youtu.be/im00GKnAAaQ