Abstract: An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.

Abstract: An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.

Abstract: An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.

Abstract: Trap muffler apparatus with bypass around a trap core is disclosed. A preferred bypass arrangement utilizing a tubular shutter valve system is described. Forward or reverse regeneration are possible. Bypass to atmosphere without filtration is avoided with dual in-line traps or with the segmented trap and control of exhaust gases to traps not being regenerated.

Abstract: A muffler-filter apparatus having a particulate trap using filter tubes with high temperature filter materials, like fiber in the form of yarn, woven yarn mat, or a non-woven, random array fiber mat, or various foams. Filter tubes have various structural configurations and are regenerated by axial propagation using ring heaters or stub rod heaters, by heating the entire length of the filter tube with a rod heater or some other full-length heater configuration. For regeneration, exhaust flow is bypassed using various valve configurations including a poppet valve, a shutter valve, or a tubular valve. Filter tube filters may also be self-regenerated by the heat from the exhaust gases as controlled by a throttle valve or on inclusion of fuel additives which lower particulate ignition temperature.

Abstract: A poppet valve assembly is provided. The preferred poppet valve assembly comprises a valve seat, valve head member and actuation arrangement. In the preferred embodiment, the valve head member comprises a flexible seal member and backing member, oriented such that the flexible seal member is positioned between the valve seat and the backing member. In use, the backing member is driven toward the valve seat, trapping the flexible seal member therebetween. The seal member engages the valve seat and is simultaneously deflected backward toward the backing member, which limits deformation of the seal member.

Abstract: Trap muffler apparatus with bypass to a common reactive acoustic element is disclosed. Bypass structure varies from external bypass to a common acoustic element to annular bypass of the ceramic filter to axial bypass through the middle of an annular ceramic filter. Forward or reverse regeneration are possible. Bypass to atmosphere without filtration is avoided with dual in-line traps or with the segmented trap and control of exhaust gases to traps not being regenerated.

Abstract: A clamp suitable for joining a pair of tubular members such as truck exhaust pipes including a metal band having a reinforcing bar at each end wrapped more than one turn, each wrapped reinforced end forming at least one hold for receiving, threading, and securing a set of bolts and nuts. The band is preferably formed from an aluminized steel, and the reinforcing bars may be non-plated. Embodiments using only the wrapped ends without reinforcing bars, folded rims, beading, and bolt-securing plates are also disclosed.

Abstract: A filter arrangement is provided which includes preferred fluid sealing between a top plate thereof and a housing. Generally, the filter arrangement includes a housing, a top plate and an internal filter. The top plate encloses an end of the housing, retaining the filter therein and directing fluid flow appropriately across the filter. Engagement between the housing and the top plate is such that a gasket may be used to provide sealing of an operable combination of the filter arrangement with an associated filter head, with respect to flow space between the housing and top plate by means of a simple gasket position externally of the filter arrangement. Several embodiments have shown, and in at least one the housing edge terminates in a groove in the top plate, in which a sealing gasket may be positioned. Positive engagement between the top plate and the housing is provided by a variety of projection arrangements.

Abstract: A filter arrangement is provided which includes preferred fluid sealing between a top plate thereof and a housing. Generally, the filter arrangement includes a housing, a top plate and an internal filter. The top plate encloses an end of the housing, retaining the filter therein and directing fluid flow appropriately across the filter. Engagement between the housing and the top plate is such that a gasket may be used to provide sealing of an operable combination of the filter arrangement with an associated filter head, with respect to flow space between the housing and top plate by means of a simple gasket position externally of the filter arrangement. Several embodiments have shown, and in at least one the housing edge terminates in a groove in the top plate, in which a sealing gasket may be positioned. Positive engagement between the top plate and the housing is provided by a variety of projection arrangements.

Abstract: A clean room ceiling grid system having a detent means for loading filter panels into ceiling grids from a clean room. The system is operable to permit removal of the filter panels by use of a filter panel removing tool. More particularly, this clean room ceiling grid system requires no plenum space use above the grid members for either installation or removal of filter panels. The system also includes means for hermetically sealing the interface of connected ceiling grid members and means for substantially laminar flow of filtered air in clean rooms.

Abstract: An improved pulse-jet air cleaner (10) includes an aspirator (32) with a tube (34) extending between a point in the tank (12) where moisture tends to collect, and a point in predetermined spaced relationship adjacent the tank outlet (20) where the airflow is of high velocity and low pressure upon actuation of the pulse valve (24) so that any moisture is automatically discharged through the valve and nozzle (26) on a substantially continuous basis without operator attention or interruption of operation of the air cleaner system.

Abstract: An integral valve and tank assembly (12) for a pulse-jet air cleaner includes a discharge pipe (22) connected to and extending directly into a tank (14). The inlet end (28) of the discharge pipe (22) terminates adjacent to a relatively larger opening (30) in the tank wall (14b), over which a diaphragm assembly (32), cover (34), and compression spring (38) are mounted so as to provide improved constructional and operational efficiency.

Abstract: An apparatus (10) for cleaning a flow of particulate-laden gas is disclosed. The apparatus (10) has a housing (11) having a gas inlet (15) and a gas outlet (16) to permit a flow of gas through the housing (11). Suspended inside the housing (11) is an electrode element (20) having a charging element (26) which defines with the housing (11) a charging chamber (31) adjacent the gas inlet (15) and having an electrostatic force element (25) which defines with the housing (11) a collecting chamber (32) adjacent the gas outlet (16). The electrode element (20) is maintained at a voltage differential from the housing (11) for charging particulate in the charging chamber (31) and subjecting charged particulate in the collecting chamber (32) to an electrostatic force, whereby charged particulate is forced outwardly toward the housing (11) and removed from the gas flow.

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: This application discloses an improved throughput blade design for louvered separators having a plurality of louvers (134). Each louver has a tab (144) extending perpendicularly from a central axis or plane (140). The optimum tap spacing S can be calculated with the knowledge of the blade angle B or the blade gap G. The tap height H is calculated as a function of the blade gap G. The tab (144) is designed to improve the efficiency the louver separator while making manufacture of the entire louvered array possible in one or two steps rather than necessitating manufacturer of each louver for later assembly.

Abstract: An improved selfcleaning 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) by a partition (10). A nozzle (70) 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 at the element outlet.

Abstract: A cowl-like scrubber (20) for removing dust generated by a longwall shearer has a housing (21) adapted to be mounted on the shearer near a cutter drum. An air inlet (23) is provided in the housing to allow the dust-laden air to enter the scrubber (20). Downstream from the inlet area is an arrangement of jet spray nozzles (30) which impart high velocity, small diameter water droplets. The water droplets entrain the dust particles in the dust-laden air and move the resulting dust-laden mist to a mist eliminator (40) downstream from the jet spray nozzles where the dust-laden mist is then removed from the air.