Animal husbandry – Milkers – With signals – indicators – registers – and timers
Patent
1981-03-26
1982-08-10
Chamblee, Hugh R.
Animal husbandry
Milkers
With signals, indicators, registers, and timers
119 52R, A01K 500
Patent
active
043432620
ABSTRACT:
A feeding device and feed storage hopper for laboratory rats, adapted to be hung from the top and inside the animal cage, comprises a substantially rectangular feed chamber containing an open top and a downwardly sloped back panel. A generally U-shaped "floating" wire screen overlies a rectangular opening in the lower front face of the rectangular feed box and is rigidly attached to the feed box to cover the opening therein except along the bottom edge of the screen. Feed which is to be ingested by the rat rests on the face of the wire mesh screen which has been designed in a manner that the weight of the feed is forced to collapse onto the screen surface as the animal consumes the feed, thus providing a continual flow and availability of feed to the rat. The screen openings are rectangular and are longer in the vertical direction to permit the use of commercially available autoclavable mash feeds and to allow the rat to contact the feed either by inserting his tongue through the screen openings or by slightly moving and flexing the lower unattached edge of the "floating screen" structure. The screened feeder is designed to restrict the entry of the rat into the feeder and thus prevent both contamination of the feed through feces or urine or uneconomical spillage of the feed which, in either case, could distort research results. The bottom surface of the screen is substantially horizontal and allows for the collection of feed spillage.
REFERENCES:
patent: 1836488 (1931-12-01), Munson
patent: 3902459 (1975-09-01), Hunziker, Jr.
patent: 3965868 (1976-06-01), Hunziker, Jr.
John Hunziker, "A New Feeder System for Quantitating Actual Toxicant Consumption by Mice During Feeding Studies", Feb. 1975, pp. 84-87, Laboratory Animal Science, vol. 25, No. 1.
Chamblee Hugh R.
The United States of America as represented by the Secretary of
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