Patent ID: 7789585

Claim:
A control barrier comprising: a barrier wall comprising a front face and an opposing back face each extending between a top end and an opposing bottom end, a first recess being formed at the bottom end of the barrier wall and extending between the front face and the opposing back face; an opening extending through a portion of the barrier wall and communicating with the first recess, at least a portion of the opening forming a first engaging portion having a non-circular transverse cross-section; an elongated first leg having an exterior surface extending between a first end and an opposing second end, a portion of the exterior surface forming a second engaging portion having a non-circular transverse cross-section, the first leg being slidably movable within the opening between a first position wherein the first leg is free to rotate within the opening over an angle of at least 45° and a second position wherein the second engaging portion is interlocked within the second engaging portion so as to substantially preclude rotation of the first leg within the opening; and a first foot mounted on the elongated first leg.