Abstract: A generally hollow plastic molded pen front provides multiple operating positions of the door having sets of interdigitating hinge knuckles on the door and door jamb on both the left and right side. The door also may be swung in or out, and one or more stops can be provided for any of four configurations—left hinged swing in; left hinged swing out; right hinged swing in; right hinged swing out. With the stops removed, the door may be swung both in and out. In one embodiment a J-shaped latching rod secures both the upper and lower portions of the door when latched and a J-shaped hinge rod cooperates on the other side and can use some of the same holes as the latching rod. In another embodiment, a pivoting handle works to secure the door in a catch channel for all six configurations. Other integrated features provide a choice of feed opening sizes and a guard that minimizes feed and water contamination.

Abstract: An indoor livestock confinement system includes a plurality of hollow plastic panels. One of the hollow plastic panels defines a U-shaped door frame. The door frame is open at the top and includes an attachment for a door at one edge. The door frame includes a reinforcement inside the panel that extends across a bottom threshold and sides of the door frame.

Abstract: The hidden interlocking hinge assembly at least partially hides or conceals the hinging mechanism of a door pivotally attached to a jamb. The assembly incorporates interlocking knuckles on the door and the jamb, an overlapping flange feature, and a corresponding depression feature that allows the overlapping flange and the depression to move relative to the other without binding and while generally concealing the balance of the assembly.

Abstract: A wall panel for a livestock confinement pen made of a hollow plastic twin sheet thermoformed body with a grid divider received in an opening of the body between the two sides of the body. One side has flanges by the opening to receive a cover cut from the other side over the opening.

Abstract: The hidden interlocking hinge assembly at least partially hides or conceals the hinging mechanism of a door pivotally attached to a jamb. The assembly incorporates interlocking knuckles on the door and the jamb, an overlapping flange feature, and a corresponding depression feature that allows the overlapping flange and the depression to move relative to the other without binding and while generally concealing the balance of the assembly.