초록 ▼

An easy to clean pet litter box is provided, in which pet litter with accumulated dry solid animal waste matter is held in a tray with a perforated bottom. Immediately below, and in sliding contact with the perforated tray bottom, is a flat sheet also provided with identically sized and distributed

An easy to clean pet litter box is provided, in which pet litter with accumulated dry solid animal waste matter is held in a tray with a perforated bottom. Immediately below, and in sliding contact with the perforated tray bottom, is a flat sheet also provided with identically sized and distributed perforations. The perforations are sized to be larger than typical pet litter granules but small enough to prevent throughflow of animal waste lumps, and are conically chamfered to funnel flow therethrough as well as to scrape off any dried waste encrustations located between the sliding elements. By moving the perforated elements to selectively block off all throughflow (closed mode) to complete congruence of apertures permitting maximum throughflow (open mode) the user sepregates waste matter from reusable pet litter within the litter box. Waste matter is then discarded and the tray put into its closed mode and the litter box turned over to resume operation. In another similar embodiment, the perforated tray bottom is simply made an integral partition of a two-part symmetric litter boxy housing. Maximum throughflow in a given screen with circular perforations is obtained when the centers thereof are disposed in a square array whose diagonals are √2 times the perforation diameters at the common sliding contact surface between the screen and the perforated flat sheet.

대표청구항 ▼

An easy to clean pet litter box that saves reusable pet litter, comprising: a generally upright box composed of four sides and open at its top and bottom ends; a generally flat cover, sized and shaped to be attached to said box at either said top end or said bottom end thereof; a tray, sized and sha

An easy to clean pet litter box that saves reusable pet litter, comprising: a generally upright box composed of four sides and open at its top and bottom ends; a generally flat cover, sized and shaped to be attached to said box at either said top end or said bottom end thereof; a tray, sized and shaped to snugly fit said box within said four sides, open at its top and provided with a bottom containing perforations of predetermined shape, size and distribution; a perforated sheet, whose perforations match said perforations of predetermined shape, size and distribution in said tray bottom, making substantial sliding contact with and movably attached to the outside of said tray bottom; and control means for controllably moving said perforated sheet with respect to said perforated tray bottom so as to selectively obtain substantial congruence or substantial mismatch between said matching perforation distributions therein.