Self scooping cat litter box

1. A self scooping cat litter box, comprising:

an uncovered, deep rectangular pan;

a scooping carriage at said pan's distal end;

a driving mechanism to drive said scooping carriage along said pan;

a waste drawer comprised on said scooping carriage, said waste drawer having a spring urged closing mechanism; and,

a pivotally supported grate vertically attached to said waste drawer.

2. The self scooping cat litter box of Claim 1 , wherein said waste drawer comprises:

a hingedly attached lid;

a spring for urging said lid closed against said waste drawer;

a tray sized to fit into said waste drawer; and

a disposable plastic cover or a lining placed over said tray,

wherein said tray can be lifted out of said waste drawer and the waste contents therein discarded by means of an outwardly extended handle positioned on said tray.

3. The self scooping cat litter box of claim 1 , wherein said litter pan further comprises:

a shallow end at the end opposite where said scooping carriage rests,

a guiding rim that extends outwards from the interior sidewall of said pan; and

a resilient deflector wiper at said shallow end, said wiper deflector engaging with the distal ends of said tines as the tines rotate upward, thereby pushing waste back onto the tines.

4. A self-scooping cat litter box, comprising:

an uncovered litter pan, said litter pan forming a cat litter receptacle for holding cat litter, said receptacle is bounded by upwardly extending sidewalls;

a motorized carriage capable of traveling about atop of said litter pan and straddling at least one said sidewall;

a waste drawer housing for retaining a removable waste drawer, said waste drawer housing is driven by said motorized carriage;

a spring urged closing mechanism in contact with said waste drawer;

a comb member pivotally supported on said waste drawer and freely hanging into said cat litter receptacle, said comb member is positioned such as when pivoted upward to be capable of guiding objects into said waste drawer;

wherein said motorized carriage drives said waste drawer in a reciprocating fashion along said litter pan, forward to accumulate and to retrieve, and backwards to collect and to store said clumps.

5. In an improved self-scooping litter box including:

a litter pan having a bottom and two spaced side walls each terminating at their upper end by a wall lip and connecting a storage end wall to a discharge end wall,

the litter pan defining an upwardly open litter chamber to be filled to a given fill level with cat litter;

the improved construction comprising:

a waste drawer housing having a spring urged closing mechanism for retaining a removable waste drawer, said waste drawer housing being capable of transiting along said wall lips; and,

a comb member pivotally supported on said waste drawer and freely hanging into a cat litter receptacle; and

wherein said comb member positioned such as when pivoted upward to be capable of guiding objects into said waste drawer, wherein a motorized carriage drives said waste drawer in a reciprocating fashion along said litter pan such as to accumulate and retrieve, and back to collect and store said clumps.

6. The improved construction of claim 5 , wherein said motorized carriage is capable of traveling about a top of one said sidewall.

7. The improved construction of claim 5 , said improvement further comprising a carriage comb path defined on at least said one side wall.

8. The improved construction of claim 5 , wherein said motorized carriage further comprises a reversible waste carriage drive motor.