Abstract: In integral filter and resonator apparatus includes filter elements positioned upstream of a Helmholtz resonator. The first embodiment includes filter elements positioned side by side within the housing. Other embodiments include a filter element with a tube which curves slightly downstream from the element. Another embodiment includes coupled chambers for attenuating the noise.

Abstract: A filter device inserts into a duct having flow passing from upstream to downstream. The filter device includes fluted filter media having flutes formed therein inserting into a housing. The filter media is stacked and placed at an angle to the prevailing flow direction.

Abstract: An improved self-cleaning air filter (2) of the pulse jet type. The filter includes at least one filter element (20) located in a dirty air plenum (6) which is separated from a clean air plenum (8). A valve (64) directs a cleaning jet of gas that moves in a back flow direction along the filter element to remove accumulated contaminants therefrom. A diffuser is located in the clean air plenum for diffusing the cleaning jet of gas to convert the cleaning jet to a high volume, low pressure jet which substantially fills the entire cross-sectional area of the filter element. The filter element is releasably contained inside the dirty air plenum on elongated support members (36). Rotatable cams (44) are provided for laterally shifting the filter element to lock the filter element in place against a dividing wall (10).

Abstract: A centrifuge apparatus (10) for separating multi-phase fluid is disclosed. The centrifuge apparatus (10) includes a bowl-like structure (12) rotatably mounted in a housing (14) for rotation about a vertical axis. The centrifuge apparatus (10) further includes means for introducing multi-phase fluid into the bowl (12) and means for driving the bowl (12) at a predetermined rotation speed. A rotor assembly is coaxially mounted in the bowl (12) for rotation therewith to accelerate or impel the multi-phase fluid such that the fluid is separated into heavier phase fluid and lighter phase fluid with solid particles being collected on the inner surface of a bowl side wall portion (16).A top wall member (18) of the bowl (12) defines axially directed openings (50) therein for discharging the heavier phase fluid. Discharge means positioned in the cylindrical side wall portion (16) extend radially into the interior of the bowl (12) for discharging the lighter phase fluid.

Abstract: A reversed air system for periodically cleaning one or more filter panels an engine air cleaner. The cleaner system includes an air nozzle at one face of the filter panel and an air receiver at the other panel face. The nozzle and receiver are arranged on ball screws for transverse movement across the filter panel faces. Under our invention, the air receiver has flexible connections with ball nuts that travel along the associated ball screws. The flexible connections have swing flexibility in different planes to alleviate potential jamming tendencies due to manufacturing tolerances, installation variances, and ball screw sag due to the unsupported length of each screw.