Selective passage barrier, e.g. for separating livestock

摘要

The barrier (1) has a passage (3) of adjustable width formed by an upright (5) attached to horizontal bars (6) able to slide telescopically in lengthwise tubular members (2a) of the barrier. The upper end of the upright has a catch in the form of a transverse pivot able to move up or down in vertical slots in two parallel plates and engage with notches in a horizontal bar on a tubular member (2b) above the passage. Each notch has a hole below it for inserting a locking pin