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Rotary Pinch Valve

IP.com Disclosure Number: IPCOM000041922D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Andrews, CF: AUTHOR [+3]

Abstract

This article relates generally to valves which control the flow of liquids and more particularly to rotary pinch valves of the type utilized in blood processing machines. Fig. 1 shows an exploded, perspective view of a rotary pinch valve 1 which utilizes only one moving part. Rotary pinch valve 1 is an assembly comprised of a solenoid 2, an actuator 3, a valve housing 4, a solenoid-mounting bracket 5 and attaching hardware. The moving part is actuator 3 which is simply rotated by the slotted solenoid shaft 6. Valve 1 can be used as normally closed or normally open by choosing the appropriate solenoid and actuator. All other components remain the same. Solenoid 2 itself provides the mechanical stops for maximum open and close position as well as the return action and open action.

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Rotary Pinch Valve

This article relates generally to valves which control the flow of liquids and more particularly to rotary pinch valves of the type utilized in blood processing machines. Fig. 1 shows an exploded, perspective view of a rotary pinch valve 1 which utilizes only one moving part. Rotary pinch valve 1 is an assembly comprised of a solenoid 2, an actuator 3, a valve housing 4, a solenoid-mounting bracket 5 and attaching hardware. The moving part is actuator 3 which is simply rotated by the slotted solenoid shaft 6. Valve 1 can be used as normally closed or normally open by choosing the appropriate solenoid and actuator. All other components remain the same. Solenoid 2 itself provides the mechanical stops for maximum open and close position as well as the return action and open action. A normally-open valve housing 4 uses a solenoid 2 with a light return spring. The power stroke of the solenoid 2 actuates the valve to close. A normally-closed valve housing 4 uses a solenoid 2 equipped with a heavy duty return spring which will provide power for valve closing. The power stroke of the solenoid 2 provides the force for opening the valve by overcoming the spring force. The only adjustment that has to be set for pinch valve 1 is the initial gap (Fig. 2). This is attained by loosening the solenoid-mounting bracket tension screws (7) and physically turning the solenoid to obtain the specified gap. The above-described pinch valve utilizes the mechanical advan...