Portable ventilating device

Details Portable ventilating device Portable ventilating device

1987-07-27

1989-06-06

Chambers, A. Michael

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820524, 417404, 417349, A62B 700, F04B 1700

Patent

active

048361984

ABSTRACT:
A portable ventilating device for ventilating patients in the field. A reciprocating piston divides a cylinder into a pressure chamber and a spring chamber in which a compression spring acts against the piston. Gas pressure applied to the pressure chamber opposes the spring force and reciprocates the piston. As the piston reciprocates ventilating gas is forced out of the piston chamber through a ventilation line equipped with a check valve. Alternative embodiments provide gas pressure assistance to the spring, make use of the gas which powers the device as the ventilating gas, and provide adjustment of the duration for the time periods gas is applied to the cylinder.

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