Browse Prior Art Database

ROTATING STAY-OPEN RELIEF VALVE

IP.com Disclosure Number: IPCOM000025160D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 53K

Publishing Venue

Xerox Disclosure Journal

Abstract

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.

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KEROX DISCLOSURE JOURNAL

ROTATING STAY-OPEN RELIEF VALVE Proposed David Eisler Classification

U.S. Cl. 137/802 Int. Cl. E03b 21/00

 AIR FLOW

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.

The operating principle is that the weight of the valve is converted into a torque that holds the valve closed. As the valve opens, the closing torque is cause to decrease by use of the special geometry. Therefore, even though the valve weight remains constant, the force tending to close the valve decreases as the valve is opened.

The threshold value at which the valve opens about hinge 15 is determined by the weight of the valve plate 16 and its deviation from the horizontal when closed. The threshold can be made adjustable by allowing the rotation of the valve!seat assembly .

Volume 8 Number 6 November/December 1983 465

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466

     XEROX DISCLOSURE JOURNAL
Volume 8 Number 6 November/December 1983

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