Emergency ventilation system for enclosed livestock confinement

Details Emergency ventilation system for enclosed livestock confinement Emergency ventilation system for enclosed livestock confinement

1978-03-13

1980-07-22

Wayner, William E.

Animal husbandry

Feeding device

Hopper and trough

119 16, 49 31, F24F 1300, A01K 3100, E05F 1520

Patent

active

042133793

ABSTRACT:
An emergency ventilation system especially adapted for use with an electrically-powered fan driven ventilation system in an enclosed livestock confinement structure includes solenoid actuated, hydraulically driven ventilation door control apparatus which is responsive to the presence or absence of the delivery of commercial electrical power service to the main ventilation system for automatically opening or closing one or more spring biased access doors in lower regions of the structure in order to assure ventilation of the structure at all times, even in the event of electrical power failures. A hydraulic cylinder assembly for shifting the position of each of the doors is operated by a hydraulic control system provided with a normally closed, solenoid operated valve which is electrically connected with the commercial power lines delivering power to the main ventilation system. Loss of commercial electrical power causes the valve to open whereupon the cylinder assembly is depressurized and the spring biased door is allowed to open. Resumption of power service results in closure of the valve and energization of a fluid pump to repressurize the cylinder assembly in order to close the door.

REFERENCES:
patent: 3050079 (1962-08-01), Tognella
patent: 3291003 (1966-12-01), Lunenschloss et al.
patent: 3802123 (1974-04-01), Frey et al.
patent: 3915377 (1975-10-01), Sutton, Jr.
patent: 3951336 (1976-04-01), Miller et al.
patent: 4056048 (1977-11-01), Milroy
patent: 4129811 (1978-12-01), Pearson

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