Patent ID: 8272179

Claim:
A barrier for a work station, comprising: first and second upright posts having upper ends and an open space between the upper ends through which an object may pass; first and second rigid panels extending between the posts and being movable between a lowered open position providing access between the posts to the work station and a raised closed position blocking access to the work station, the panels having opposite ends; a cylinder adjacent the first post and having an extendible and retractable arm connected to the first panel for moving the first panel between its lowered and raised positions; the second panel being connected to the first panel for movement between its raised and lowered positions upon actuation of the cylinder arm; the distance moved by the second panel between its lowered and raised positions being greater than the length of extension and retraction of the cylinder arm; and a pulley system extending adjacent the first post and operatively connected to only one end of the first and second panels and to the arm of the cylinder to raise and lower the second panel when the arm is retracted and extended.