Patent ID: 7216741

Claim:
A work station for servicing a bulk material handling tank truck having a hatch cover pivotable about a horizontal axis extending in the longitudinal direction of the truck from a closed position to an open position in which the top of said hatch cover is disposed at a lateral side of the truck, comprising: an elevated service platform, a gangway connected at one of its ends to said platform, a safety cage mounted on the other end of said gangway with an access opening at said other end of said gangway for worker entry, said cage having a guard rail structure forming a quadrilateral enclosure except for said access opening and including an offset portion with laterally opposite sides, said laterally opposite sides adapted to be spaced laterally from said hatch cover a distance less than the width of said hatch cover, each of said laterally opposite sides of said offset portion having a lower section which is shiftable between a normal guard position and an adjusted position in which said hatch cover can be pivoted to said open position.