Adjustable damper for clean room systems
First Claim
Patent Images
1. An air filtration system comprising:
- a frame;
an air filter supported by said frame;
an air flow control valve on said frame in spaced relationship with said air filter, said valve comprising;
a fixed plate defining a plurality of rows of apertures, said fixed plate being mounted on said frame and being fabricated from fiberboard;
a foam plate movably positioned on said fixed plate, said foam plate defining a plurality of apertures; and
adjustment means connected to said foam plate for moving said foam plate relative to said fixed plate to move said apertures into and out of alignment, said foam plate fabricated from a material of sufficient flexibility to conform to and seal with an upper surface of said fixed plate to prevent leakage between said apertures and to provide for sound attenuation.
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Accused Products
Abstract
An adjustable damper or air flow control valve for clean room systems, laminar flow benches, filter diffusers, fan/filter units and the like includes a fixed plate defining a plurality of rows of apertures. The plate is fabricated from an aluminum-clad fiberboard. A movable, foam plate is positioned on the fixed plate. The foam plate is fabricated from a cross linked polyethylene foam and also defines a plurality of apertures. The foam conforms to the fiberboard plate and prevents cross flow between adjacent apertures. Relative movement between the two plates moves the apertures into and out of alignment to control the flow of air to a filter.
50 Citations
11 Claims
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1. An air filtration system comprising:
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a frame; an air filter supported by said frame; an air flow control valve on said frame in spaced relationship with said air filter, said valve comprising; a fixed plate defining a plurality of rows of apertures, said fixed plate being mounted on said frame and being fabricated from fiberboard; a foam plate movably positioned on said fixed plate, said foam plate defining a plurality of apertures; and adjustment means connected to said foam plate for moving said foam plate relative to said fixed plate to move said apertures into and out of alignment, said foam plate fabricated from a material of sufficient flexibility to conform to and seal with an upper surface of said fixed plate to prevent leakage between said apertures and to provide for sound attenuation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An air flow control valve capable of providing air velocity equalization and sound attenuation, said valve comprising:
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an elongated, generally rectangular aluminum clad, fiberboard sheet, said sheet defining a plurality of regularly positioned first apertures; an elongated, generally rectangular cross linked polyethylene foam sheet in sealing and sliding contact with said fiberboard sheet, said foam sheet defining a plurality of regularly positioned second apertures; and adjustment means engaging one of said sheets for moving said sheets relative to each other between an open position with said apertures in alignment and a closed position with said apertures out of alignment, said foam sheet preventing cross flow between said apertures and providing sound attenuation downstream of said fiberboard sheet. - View Dependent Claims (8, 9, 10, 11)
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Specification