Animal husbandry – Milkers – With signals – indicators – registers – and timers
Patent
1990-03-28
1991-09-03
Weiss, John G.
Animal husbandry
Milkers
With signals, indicators, registers, and timers
119 17, A01K 103
Patent
active
050443160
ABSTRACT:
A ventilated caging system of the type having ducted shelves with lower planar surfaces for box-like animal enclosures, the shelves having duct openings for powered supply and exhaust of air to the animal cages, has valved filter covers operable to isolate the animal enclosure from ingress and egress of airborne particles. The filter cover has a frame sealingly engaging a perimeter of the cage, the frame carrying a filter membrane with at least one opening. A support web integral with the frame extends inwardly of the perimeter within the frame to support a valve. A movable valve body in the form of a leaf spring is mounted on the support web, the valve body including a blocking portion resiliently urged to block the opening in the filter membrane, and a contact portion protruding through the opening by an opening displacement of the valve body, the blocking portion being displaced by the contact portion when the cage is fitted in the ventilating rack, whereupon the valve is opened, and the blocking portion being resiliently released to cover the opening when the cage is removed from contact with the ventilating rack, whereupon the valve is closed.
REFERENCES:
patent: 3343520 (1967-09-01), Schwarz, Jr.
patent: 3528227 (1970-09-01), Lee et al.
patent: 3769936 (1973-11-01), Swanson et al.
patent: 4249482 (1981-02-01), Harr
patent: 4343261 (1982-08-01), Thomas
patent: 4365590 (1982-12-01), Ruggieri
patent: 4402280 (1983-09-01), Thomas
patent: 4480587 (1984-11-01), Sedlacek
patent: 4593650 (1986-06-01), Lattuada
patent: 4640228 (1987-02-01), Sedlacek et al.
Thoren Caging Systems, Inc.
Weiss John G.
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