Pressure-limiting valve wherein valve plate oscillations are pre

Details Pressure-limiting valve wherein valve plate oscillations are pre Pressure-limiting valve wherein valve plate oscillations are pre

1998-10-19

2000-08-08

Weiss, John G.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820324, 12820716, 137541, A61M 1500

Patent

active

060986239

ABSTRACT:
A pressure-limiting valve for use in a gas system for manual ventilation of patients, has a valve seat with an opening, a valve plate and a force-generating element, the force-generating element being arranged to press the valve plate against the valve seat in order to close the opening. In order to reduce the risk of annoying noise from the valve, the valve is devised so the valve plate is asymmetrically shaped, so as to cause a gas flowing through the opening in the valve seat, when the valve is in the open position, to apply an asymmetrical force against the valve plate.

REFERENCES:
patent: 3780760 (1973-12-01), Berner
patent: 4056121 (1977-11-01), Gerdes
patent: 4454893 (1984-06-01), Orchard
patent: 5199769 (1993-04-01), Beck et al.
patent: 5687709 (1997-11-01), Akerberg
patent: 5890513 (1999-04-01), Di Stefano

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