초록 ▼

A breathing regulator includes a pressure-responsive piston which acts directly on a valve seat to open a pressurized gas pilot valve during inhalation. The same piston provides an outlet for exhalation. The piston is moved to open the pilot valve by inhalation suction. A one-way valve automatically

A breathing regulator includes a pressure-responsive piston which acts directly on a valve seat to open a pressurized gas pilot valve during inhalation. The same piston provides an outlet for exhalation. The piston is moved to open the pilot valve by inhalation suction. A one-way valve automatically blocks the exhalation path during inhalation. The outlet for the pressurized gas provides an injector nozzle effect to reduce the effort required to actuate the valve during inhalation. The preferred embodiment of the invention incorporates the regulator in a resuscitator or respirator for medical applications. In this embodiment, a mechanism is included for controlling the amount of inhalation back pressure in the patient\s air passages which will close the pressurized gas valve and open the exhaust passage in the regulator. This mechanism includes an adjustable spring-loaded pressure plate on the external side of the piston. The inhalation pressure adjusting mechanism also provides for positive end expiratory pressure. In another embodiment, the basic regulator is adapted for use as a breathing regulator for high altitude aviation. In this embodiment, the invention includes aneroid bellows which close an ambient air inlet when a predetermined altitude is reached, so that breathing is exclusively from a pressurized gas source. The aviation embodiment also provides for pressurized breathing.

대표청구항 ▼

A device for the regulation of a user\s breathing from a source of pressurized gas, comprising: a housing having passage means for conducting said pressurized gas to said user; a valve body in said housing, said valve body having a pressurized gas inlet and a gas outlet, said outlet communicating wi

A device for the regulation of a user\s breathing from a source of pressurized gas, comprising: a housing having passage means for conducting said pressurized gas to said user; a valve body in said housing, said valve body having a pressurized gas inlet and a gas outlet, said outlet communicating with said passage means; a first pressurization chamber in said body, communicating with said inlet; valving means, moveable within said body, for controllably opening and closing said outlet, said valving means having first and second surfaces, said first surface confronting said first chamber, said second surface having a larger area than said first surface; a second pressurization chamber communicating with said first pressurization chamber, said second surface of said valving means confronting said second chamber, said valving means being moveable in opposite directions within said body in response to the force differential between said first and second surfaces so that said valving means closes said gas outlet when the force on said second surface, equal to the pressure on said second surface times the area of said second surface, is greater than the force on said first surface, equal to the pressure on said first surface times the area of said first surface, thus closing said gas outlet when the pressures in said first and second pressurization chambers are equal, and said valving means opens said gas outlet when the force on said first surface is greater than the force on said second surface; a pilot valve having pilot passage means for venting gas from said second chamber to reduce the pressure in said second chamber with respect to the pressure in said first chamber so that said valving means opens said outlet; pilot passage closure means, slideably moveable between a first position and a second position, for closing said pilot passage means in said first position and opening said pilot passage means in said second position; pilot valve actuating means, attached to said pilot passage closure means, and forming a pressure interface between the interior and exterior of said housing, for moving said closure means from said first position to said second position in response to an inhalation-induced reduction in pressure on the interior side of said interface with respect to the pressure on the exterior side of said interface; and exhalation outlet means from said housing.