Patent ID: 7189212

Claim:
A having a pair of relatively pivotal arms, a hinge plate mounting said arms for relative pivotal movement and having a plurality of apertures therein, and one or more limit pins insertable in a selected one or selected ones of the apertures for limiting or preventing relative movement of said arms, and a cover for said limit pins moveable between an open position and a closed position for permitting access to said pins in open position and for preventing access to said pins in closed position and for preventing accidental displacement of said pins in closed position, said cover being movably mounted on the hinge plate for movement in a plane generally parallel to the hinge plate, said cover comprised of a pair of cover elements moveably mounted on the hinge plate for movement toward and away from one another between the open and closed positions, each said cover element being mounted for movement in a plane generally parallel to the hinge plate; said cover including a base secured to the hinge plate and defining a pair of pivot points generally normal to the hinge plate, said cover elements being pivotally mounted on said base at respective ones of said pivot points for pivotal movement between the open and closed positions; said cover elements having portions which overlap each other in the closed position of the cover, and a latch member moveably mounted on said base for movement into locking engagement with the overlapping portions of the cover elements in the closed position and for movement out of engagement with the cover elements to accommodate movement of the cover elements to open position.