Patent ID: 7762213

Claim:
A cartridge used with a litter box machine and a predetermined litter, the litter box machine having a rake moveably connected to the machine and contacting the litter at a generally constant height with respect to said cartridge, the litter cartridge comprising: a one-piece generally non-compartmentalized tray formed to be compatible with said litter box machine and being removable therefrom, said tray having a floor, at least one sidewall and an opening on top to define a single chamber for receiving the moveable rake to comb through the litter at a constant height above the tray floor of cartridge to move a waste and to store the waste within the tray; and a waste lid for covering only a portion of said tray defining a covered portion and an uncovered portion within the single chamber, said covered portion defining a waste storage area with litter, said uncovered portion defining a waste receiving area, said waste lid having an open position and a closed position, wherein the open position allows the rake to travel at the constant height above the floor of the tray collecting the waste within the single chamber of the tray, and wherein the rake is able to move waste and waste mixed with litter from said waste receiving area to said waste storage area.