Abstract: The present invention is directed at a filter and method for making the filter. The filter has a first filter layer of high efficiency melt blown filter medium having an efficiency of pre-HEPA to HEPA, and a second filter layer of cellulose support medium by which the first filter layer is supported. The filter is pleated, and a plurality of dimples for separating a plurality of pleats can be fabricated on the pleat tips.

Abstract: The present invention pertains to a refillable gas adsorption bed assembly having a box-like, generally rectangular frame The frame has a pair of oppositely disposed side members and a pair of oppositely disposed end members. There is a first and a second rectangular fine mesh screen mounted within the frame on opposite sides of a filler opening through one of the side members. The first and second prefilters are mounted within the frame. The first prefilter is disposed to one side of both screens and the second prefilter is disposed on the opposite side of both screens. The invention includes a housing for the gas adsorption bed assembly and a counterflow adsorber module formed by operably connecting the housings end-to-end.

Abstract: A high efficiency filter assembly having a generally rectangular pleated filter element with ends defined by the pleated edges of the element and sides defined by generally planar side edges of the element. The filter element is mounted in a generally rectangular housing formed by two pairs of oppositely disposed frame members that are joined together. Each frame member has a planar base member and a pair of upright side member defining an open ended channel to receive the ends and sides of the filter element. At least one spacing member extends along the base portion to space the ends and sides of the filter element from the surface of the planar member. A dam member is provided at each end of one of the pairs of planar members to enclose the channel, and a sealant is disposed in the channel and the ends of the filter element are embedded in the sealant.

Abstract: An anti-diffusion chemical breather assembly for disk drives having a body portion (20), a cover portion (40), and a filter media (50), including a layer (51) impregnated with activated charcoal granules (53). When assembled, the body portion (20) and cover portion (40) define therebetween a sealed tortuous passage 15 which provides fluid communication between external environment and a hard disk drive interior when the apparatus is positioned in a receiving cavity of a hard disk drive. The tortuous passage limits the rate of moisture entry into the disk drive unit.

Abstract: Apparatus for, and the method of, cleaning air, for engines and related uses, including an air cleaner with a body having a vertical axis and including a cylindrical wall, a solid top closure, and a bottom closure including an axial, reentrant, cleaned air outlet conduit defining with the wall a lower annular space, the wall being provided with a lateral scavenge outlet to the annular space below the upper end of the outlet conduit, with a plurality of inwardly formed spirally oriented peripheral ambient air inlet louvers spaced therearound above the upper end of the outlet conduit, and with a bleeder arrangement including a plurality of secondary ambient air inlet ports spaced around the wall above the louvers and adjacent the lid, the arrangement being designed for connection of the outlet conduit to the inlet of an engine, to enable air flow to the engine inwardly through the louvers and the bleeder means, and for connection of the scavenge outlet to aspirating apparatus such as an aspirator actuated by th