Passively addressable fluid valves having S-shaped blocking film

Details Passively addressable fluid valves having S-shaped blocking film Passively addressable fluid valves having S-shaped blocking film

1996-09-06

1999-04-27

Lee, Kevin

Valves and valve actuation

Electrically actuated valve

25112906, 251901, 137597, F16K 3102

Patent

active

058970975

ABSTRACT:
A bistable valve useful for paper handling applications is disclosed. The valve can be batch fabricated in two dimensional valve arrays, with each valve in the array being controlled by passive matrix addressing. Typically, each valve includes a valve housing having an aperture plate defining an aperture therethrough, and an opposing plate positioned in spaced apart relationship to the aperture plate. A flexible film or strip is attached at its first end to the aperture plate and at its second end to the opposing plate. Valve action is provided by use of at least two switching electrodes for moving the flexible film between an aperture blocking position and an aperture open position, with at least one of the switching electrodes positioned adjacent to the aperture plate and at least one of the switching electrodes positioned adjacent to the opposing plate. To reduce unswitched movement when the switching electrode bias is reduced or not present, at least two electrostatic or mechanical catches are used.

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