Cat litter box
View Patent ↗A cat litter box has an open top enclosure provided with a bottom and sidewalls extending upward to form the enclosure. A lid with a central aperture configured to permit ingress and egress of a cat is provided to rest on the open top enclosure. The surface of the lid from the central aperture toward the perimeter is provided with a plurality of apertures to form a grated surface on the lid.
1. A cat litter box comprising:
an open top enclosure having a bottom and at least three sidewalls extending upward from the bottom;
a lid having a central aperture therein, the lid configured to rest on the open top enclosure, the central aperture configured to permit ingress and egress of a cat, the lid further comprised of a plurality of grate apertures forming a grated surface on the lid;
wherein the lid further comprises a plurality of protrusions, each protrusion having a first end formed by one of the grate apertures and a length extending downward into the open top enclosure when the lid rests on the open top enclosure.
2. The cat litter box of claim 1 , wherein each protrusion further comprises a second aperture is provided at a second end of the protrusion.
3. The cat litter box of claim 2 , wherein each protrusion is substantially frustoconical, and wherein the diameter of the grate apertures is greater than the diameter of the second apertures.
4. The cat litter box of claim 3 , wherein the length of each protrusion is at least four times greater than the diameter of each grate aperture.
5. The cat litter box of claim 3 , wherein the length of each protrusion is at least four times greater than the diameter of each second aperture.
6. A cat litter box comprising:
an open top enclosure formed by a substantially rectangular bottom, four sidewalls extending upward from the substantially rectangular bottom, and four beveled corners connecting adjacent sidewalls;
a lid having a central aperture and a grated surface, the lid configured to rest on the open top enclosure, the central aperture configured to permit ingress and egress of a cat;
wherein the grated surface is comprised a plurality of grate apertures;
wherein each grate aperture forms one end of a protrusion, and wherein the opposite end of the protrusion is provided with a second aperture;
wherein each protrusion is substantially frustoconical, and wherein the second aperture is provided with smaller diameter than the grate aperture.
7. The cat litter box of claim 6 , wherein the length of each protrusion is at least four times greater than the diameter of each grate aperture.
8. The cat litter box of claim 6 , wherein the length of each protrusion is at least four times greater than the diameter of each second aperture.
9. The cat litter box of claim 6 , wherein the grate apertures and the second apertures are substantially circular.