Patent ID: 7384017
Filing Date: 2008-06-10
Classification: B61L

Abstract:
1. A retractable gate, comprising: a plurality of gate arms sections each section having a first end, a second end, and a length and being relatively disposed in a sequence having the length of said gate arms being substantially parallel, and being relatively movable from retracted position to an adjustable extended position, wherein a support member having thereon a position corresponding to the location of one end of the retractable gate arm sections; and a pivot bearing connecting a first of said retractable gate arm sections to said support at said position wherein said plurality of gate arm sections is movable about said pivot bearing connection through a selected angle relative to said support member, wherein said first ends of said plurality of gate arm sections are proximal to said pivot and said second ends of said plurality of gate arm sections are distal to said pivot when said plurality of gate arms are in said retracted position; and a gate arm section motion device connected to said support member and at least one of said plurality of gate arm sections to provide a motion of at least one of said gate arm sections relative to another of said plurality of gate arm sections as a result of the motion of said plurality of gate arms relative to said support member, wherein