Abstract: A pneumatic conveying system for particulate material. An upper vessel includes an inlet for the material. An intermediate housing is open to and located under the inlet. A primary check valve is located in the intermediate housing and will receive the material from the inlet. A lower housing is located beneath the intermediate housing. The lower housing includes a secondary check valve therein which receives the material from the primary check valve. A material exit is located below the secondary check valve. Each of the check valves includes an opening through which the material may flow. This opening is oblique to vertical, and a movable closure member is connected to alternatively open or seal the opening. Pressurized air is supplied to the check valves in an alternating manner.

Abstract: A cleaning arm for a cylindrical baghouse pivoting centrally of the clean air plenum with a cam controlled valve to provide backflushing air to successive concentric rings of filter bags with each full revolution of the cleaning arm.

Abstract: A filter bag and cage assembly which can be installed or removed from beneath the tube sheet of a baghouse. The filter bag is releasably mounted by a snap ring to a collar secured to the bottom of the tube sheet. A wire mesh cage providing skeletal support for the bag is suspended therein by a hanger which includes a pivotal support bar extending across and supported on the upper rim structure of the bag. When removal of the assembly downwardly is desired, as when there is insufficient clearance above the baghouse, the support bar is raised slightly and pivoted such that it is able to fit into the bag. The snap ring is then released, and the entire assembly can be lowered from the tube sheet together.

Abstract: A cleaning purge head for a baghouse traveling centrally of the clean air plenum to isolate and back flush with high pressure air successive compartments of filter bags arranged in two parallel banks of filters. Through a depressible seal, the purge head communicates with a pressure chamber supplying cleaning air. A cam activated valve regulates the bursts of cleaning air supplied to successive filter bag compartments as a delivery conduit registers therewith such that the purge head alternates in cleaning the two banks of filters on successive passes through the baghouse.

Abstract: A cleaning purge head for a baghouse traveling centrally of the clean air plenum to isolate and back flush with high pressure air successive compartments of filter bags arranged in two parallel banks of filters. Through a depressible seal, the purge head communicates with a pressure chamber supplying cleaning air. A cam activated valve regulates the bursts of cleaning air supplied to successive filter bag compartments as a delivery conduit registers therewith such that the purge head alternates in cleaning the two banks of filters on successive passes through the baghouse.

Abstract: Disclosed is a clamping means for securing filter bags in a bag filter device. The bag filter device has a filter chamber separated from a plenum chamber by means of a partition having openings therein through which the filter bags extend from the plenum chamber into the filter chamber. Gas to be filtered is passed into the filter chamber and flows through the walls of the filter bags from the outside to the inside thereof and thence into the plenum chamber prior to being discharged from the filter device as cleaned gas. The partition has a stationary shoulder surrounding each opening on the plenum chamber side. The open end or cuff of each filter bag is clamped between the shoulder and a clamping ring so as to secure the filter bag in the partition and to effect a seal which prevents leakage of unfiltered gas into the plenum chamber from the filter chamber. The seal is maintained by the influence of gravity or by a seating or force-applying means.

Abstract: A self-cleaning filter for a particulate-laden gas stream. A circular filter surface is positioned in the gas stream exhaust and includes a centrally mounted drive train. An elongate rotor transverses the face of the filter surface and is centrally coupled by a flexible joint to the drive train for rotative drive. Wheels mounted on each end of the rotor engage a circular track at the periphery of the filter surface; one wheel is spring biased to continually force the wheel at the opposite end of the rotor against the track. A vacuum cleaning head is associated with the arm of the rotor opposite the spring biased wheel to remove particulate matter collected on the filter surface.

Abstract: A filtering device is disclosed for removing particulate solids from a continuously flowing gas stream and which comprises a filter chamber that contains filter bags from which filtered gas is discharged into a plurality of plenum chambers arranged in a radial pattern around the axial center line of the filter. A pressure blower for a cleaning gas is located centrally with respect to the plenum chambers, and the casing of the blower is intermittently revolvable and has an outlet which sequentially falls into alignment with outlets in the plenum chambers through which filtered gas normally flows outward, but through which the cleaning gas is injected inwardly when aligned with the outlet of the blower casing, thereby providing means for intermittently reversing the gas flow in the filter bags and momentarily generating a pressure therein which is greater than exists in the filter chamber.