Patent ID: 7448381

Claim:
An apparatus having at least five respective valves disposed therein for controlling respiration of a controlled body, comprising: a first circuit having an end adapted to be connected to said controlled body and an opposite end connected to the outside of the apparatus; two respective valves disposed independently in said first circuit, said respective valves comprising: a first check valve disposed in said first circuit for allowing said controlled body to inhale from said outside through said first circuit and preventing exhaled air from said controlled body from flowing into said first circuit; and a first solenoid-operated valve disposed in said first circuit for selectively connecting and disconnecting a respiratory system of said controlled body to and from said outside; a second circuit having an end adapted to be connected to said controlled body and an opposite end connected to said outside; three other respective valves disposed independently in said second circuit, said other respective valves comprising: a second check valve disposed in said second circuit for allowing said controlled body to exhale to the outside through said second circuit and preventing said controlled body from inhaling through said second circuit; a second solenoid-operated valve disposed in said second circuit for selectively connecting and disconnecting the respiratory system of said controlled body to and from said outside; and a third check valve for preventing flow from the second circuit to the first circuit; and control means for controlling said first solenoid-operated valve and said second solenoid-operated valve at a predetermined time in a respiratory cycle thereby to disconnect the respiratory system of said controlled body from said outside, and for controlling said first solenoid-operated valve and said second solenoid-operated valve after elapse of a predetermined period from said predetermined time thereby to connect the respiratory system of said controlled body to said outside.