| 摘要 |
875,790. Artificial respiration apparatus. SEELER, H. W. Oct. 29, 1958 [July 7, 1958], No. 34719/58. Class 81 (2). A breathing control valve for use in artificial respiration apparatus comprises a housing having an inner chamber communicating with four passages, the first passage 14 being controlled by a one-way valve 12 to admit air to the chamber, the second passage 4 being connected to a source of intermittent positive and negative pressure, the third passage 30 communicating with atmosphere and the fourth passage 2 being connected to a source of intermittent positive pressure, and a valve member 24 movable between a first position, in which it seals the second and fourth passages from one another and permits communication between the third and fourth passages, and a second position, in which it closes the third passage and permits communication between the second and fourth passages. The valve is used in mouth-to-mouth artificial respiration apparatus, the second passage 4 being connected by a tube 6 to a mouthpiece 10 for the operator and the fourth passage 2 being connected to the patient. On inhaling through the tube 6 the operator draws fresh air into the tube 6 through ports 14 controlled by the one-way valves 12 and causes the valve member 24 to seat against a first opening 26 thus cutting off the first and second passages from the third and fourth passages. As the valve member 24 seats against the first opening 26, it permits communication between the fourth and third passages through a second opening 28 so that air in the patient's lungs escapes to atmosphere. When the operator exhales into the tube 6 the valves 12 close and the valve member 24 is unseated from the first opening 26 and seats against the second opening 28, thus allowing the fresh air in the tube 6 to pass through apertures 34 in the valve member to the fourth passage and the patient. At the same time, the third passage to atmosphere is closed. |
