Abstract: A hinge pin, preferably made of plastic material comprises, in a first embodiment, a serrated portion which extends outwardly of the hinge and a cap member which snappingly and resiliently engages the serrated member, the serrated member being severable to adjust for hinge length. In other embodiments, the hinge pin has resilient flap-like members which normally extend outwardly of the shank of the hinge pin, and which are resiliently present against the hinge pin during insertion of the hinge. The flap-like members flapping outwardly after passing through the hinge to secure the hinge pin in place. In other embodiments, first and second members, which extend into the hinge pin opening of a hinge from opening ends thereof, are interconnected by a spring member which extends outwardly of the hinge to retain the hinge pin in place.

Abstract: A pet sanitary facility having a stack of a plurality of liquid impervious and a plurality of liquid absorbant layers, interleaved with each other, located below a perforated platform member made of non-liquid adsorbant material. The peripheral portions of the stack may have support means surrounding same to raise the peripheral portions thereof. Spacer and support means is provided between the platform member and the stack.