Patent ID: 6745520
Filing Date: 2004-06-08
Classification: E05G,E05Y

Abstract:
An apparatus, comprising:a first pair of end barriers defining an entrance, said first pair of end barriers movable between a first position in which said entrance is open and a second position in which said entrance is blocked; a second pair of end barriers defining an end egress located opposite and spaced apart from said entrance so as to define a walkway therebetween, said second pair of end barriers movable between a first position in which said end egress is open and a second position in which said end egress is blocked; a first side barrier defining a first side egress relative to said walkway, said first side barrier movable between a first position in which said first side egress is open and a second position in which said first side egress is blocked; and a support structure for holding all of said barriers an upright manner and for facilitating movement of all of said barriers between said barriers' respective first and second positions, wherein at least one of said barriers is a panel and wherein said support structure includes one or more channels operable to constrain the movement of said panel.