ROTATING STAY-OPEN RELIEF VALVE
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Most valves, such as the conventional reed valve, open an incremental amount proportional to a pressure differential across the valve. The improved rotating stay-open relief valve 30 in the figure has an advantage over conventional valves since it is simple, low cost and reliable. The valve has a desirable two-state operation; open or closed. Once pressure (or vacuum) exceeds a threshold value, the valve opens wide and stays open until pressure (or vacuum) returns almost to zero. Then the valve closes again.