Patent ID: 6439802
Filing Date: 2002-08-27
Classification: E01F

Abstract:
A variable length roadway barrier module for pivotal connection to one or more other modules to form a movable roadway barrier chain and for selectively lengthening or shortening said movable roadway barrier chain responsive to lateral displacement of said movable roadway barrier chain, said variable length roadway barrier module comprising:a first barrier module structure; a second barrier module structure, said first and second barrier module structures being selectively movable relative to one another and including connection means for connecting said variable length roadway barrier module to at least one other module of a movable roadway barrier chain; connector means connecting said first barrier module structure to said second barrier module structure; and control means operatively associated with said connector and with said first barrier module structure and said second barrier module structure for selectively enabling extension and retraction of said first barrier module structure relative to said second barrier module structure responsive to movement of said variable length roadway barrier module, said control means when in a first state resisting the extension and retraction of said first and second barrier module structures relative to one another, and said control means when in a second state preventing the extension and retraction of said first and second barrier module structures relative to one another.