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US 7,611,557 B2Granted
Reversed pressure relief valve
AssigneePlitek, L.L.C.
InventorKarl K. Hoffman
Life of this patent
Estimating the term…
Abstract
A reversed pressure relief valve that is used in connection with a computer hard disk drive so as to vent pressurized gases contained within the disk drive while not permitting debris to enter the drive mechanism or the valve. More specifically, the present invention is a reversed direction valve which includes at least one passageway defined by at least a lifter ring, a dry strap, a pressure sensitive adhesive (“PSA”)/body film and a filter media.
Claims18
A reversed valve for computer hard disk drives comprising:
- a filter media layer;
- a PSA/body film located below said filter media layer,
- a laminating adhesive partially attaching the filter media to the PSA/body film;
- a dry strap located below said PSA/body film;
- dry strap PSA adhesive adhered to the outer ends of the dry strap that attaches a portion of the dry strap to the PSA/body film;
- a lifter ring located below said dry strap having a ring-shaped configuration that permits gas to penetrate through the center of the ring;
- lifter ring adhesive on a top surface of said lifter ring that attaches a portion of the lifter ring to the dry strap;
- a laminating adhesive on a bottom surface of said lifter ring that attaches said reversed valve to a surface.
5 more elements
A reversed valve for computer hard disk drives comprising:
- a filter media layer;
- a PSA/body film positioned below said filter media layer, said PSA/body film being acrylic pressure sensitive material of thickness between around 0.001 to 0.005 inches:
- a dry strap layer positioned below the filter PSA/body film;
- a lifter ring layer positioned below the dry strap wherein the lifter ring has an exterior wall and an interior wall;
- wherein the interior wall of the lifter ring and the dry strap form a chamber that permits gases to flow through the chamber when the pressure is greater than ambient;
- and prohibits air flow when the pressure is less than or equal to ambient;
- an adhesive binding the filter media layer, the dry strap and lifter ring together.
4 more elements
Dependencies are inferred from the claim text.