Animal husbandry – Entomological culture device – Egg treatment – production – or storage
Patent
1984-12-10
1986-10-14
Chamblee, Hugh R.
Animal husbandry
Entomological culture device
Egg treatment, production, or storage
A01K 2300
Patent
active
046165983
ABSTRACT:
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 .sqroot.2 times the perforation diameters at the common sliding contact surface between the screen and the perforated flat sheet.
REFERENCES:
patent: 1069799 (1913-08-01), Mayn
patent: 1595685 (1926-08-01), Parini
patent: 4030448 (1977-06-01), Nuttall
patent: 4325822 (1982-04-01), Miller
Burniski Edward W.
Jannuzzi Michael A.
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