Patent ID: 8622023

Claim:
A pet litter box, comprising: a housing having left, right, front, and back walls defining a well, wherein: the left, right, and back walls comprise a plurality of apertures on the top of said left, right, and back walls; the left wall further comprises a first plate, having a plurality of sides, wherein a first side has a plurality of posts that connect to said apertures on the top of said left wall and a second side has at least one tab; the right wall further comprises a second plate, having a plurality of sides, wherein a first side has a plurality of posts that connect to said apertures on the top of said right wall and a second side has at least one tab; and the back wall further comprises a third plate, having a plurality of sides, wherein a first side comprises a plurality of posts that connect to said apertures on the top of said back wall, a second side comprises a recess that connects to said one or more tabs on said first plate, and a third side comprises a recess that connects to said one or more tabs on said second plate; a grid comprising a plurality of holes between grid lines configured for the housing, and a locking mechanism along an edge of said grid; a locking frame having an aperture, configured to lock over the grid; and a locking mechanism on an outside wall of said housing to engage said locking mechanism on said grid.