Pet litter box

A pet litter box to collect pet wastes comprising of:

• a. a cylindrical litter pan having a pan-diameter, a center, an outer wall, an inner wall and an open top end comprising of:
• i. an inner brim at said open top end having an inner-brim diameter, said inner brim extending radially inward toward said center;
• ii. an outer brim having an outer-brim diameter and connected to said outer wall, wherein said outer-brim diameter is larger than said inner-brim diameter forming a bag-space between said inner and outer brims;
• iii. a semi-circular groove constructed in said outer brim;
• iv. a movable circular ring having means to rotatably engage to said inner brim;
• v. a handle attached to said movable circular ring, said handle extending out of said outer brim from said semi-circular groove;
• vi. a plurality of stationary pan-hooks installed at a top portion of said inner wall and at a predefined space from each other;
• vii. a plurality of movable ring-hooks installed at said inner side at a predefined space from each other;
• and
• viii. a plurality of elastic bands, each band attaching a pair of adjacent pan-hooks and ring hooks;
• b. a litter lid to be placed on said litter pan and having a lid-top and an opening to allow a pet to enter and exit said litter box;
• and
• c. a litter bag having an open end and a closed end, wherein said closed end is set inside said litter pan and said open end is rolled and stored in said bag-space,
• whereby by turning said handle, said elastic bands twist said litter bag and close said open end.