Abstract: An apparatus for filtering particulate material from air and for removing the particulate material collected upon a filter is disclosed. The apparatus includes a housing having an inlet and an outlet. A hollow longitudinally extending filter is secured within the housing for filtering particulate material from the air passing from the inlet to the outlet. The hollow filter has a relatively rigid configuration but still is capable of being distorted. The hollow filter is formed of a pleated porous material. One longitudinal end of the filter is secured relative to the housing and a closure plate is secured to the other longitudinal end. A mechanism is provided for moving the plate to distort the filter and remove particulate material collected thereon.

Abstract: A vacuum cleaner comprising a first whirl chamber for receiving dust-laden air and separating heavy and light dust particles therefrom, a second whirl chamber communicating at its inlet end with said first whirl chamber for receiving air therefrom and concentrating very light dust particles in said air, an intermediate chamber arranged at the outlet end of the second whirl chamber for receiving the very light dust particle-containing air therefrom, and a separate air-passage connection between the intermediate chamber and the first whirl chamber for return of said very light dust particle-containing air thereto.

Abstract: An enclosed portable container for gravel and dust in a vacuum cleaning system, provided with at least two cyclone air cleaners, having a clean out door, and each cyclone is provided with its own clean out door, is skid mounted for pick up and carry to dumping areas, reducing the handling of collected dirt, gravel and dust. The separate air pump assembly provides motivating power for the vacuum cleaning system.

Abstract: An industrial dust collection system for collecting dust created by operation of a machine comprising dust collecting and storage means remote from the machine; a cyclone chamber means associated with the dust collecting and storage means for receiving dust laden air from the machine; forced air blower fan means associated with the cyclone chamber means for establishing a continuous induced flow of dust laden air from the machine to the fan means and for establishing a flow of dust laden air from the fan means to the cyclone chamber means; flow direction control means in the chamber means for establishing a circular and axially downward flow of dust laden air within the cyclone chamber means; vortex chamber means within the cyclone chamber means for establishing an upward flow of air in the center of said cyclone chamber means; and dust discharge passage means connecting said cyclone chamber means to said dust collecting means for transfer of dust from said cyclone chamber means to said dust collecting means

Abstract: A canister type vacuum cleaner having cylindrical walls and a bottom therein supporting at the upper open end thereof a suction type blower and filter is provided with discharge means attachable to the bottom of the canister and including a transverse slide adapted to close an opening formed in a supporting plate for the slide and an additional coaxial opening which is to be formed in the bottom of the canister, the canister also including a conical, funnel-like deflector having a central opening coaxial with the opening in the bottom of the canister, the slide forming a closure which is spring-pressed in closing direction and including a manipulating handle and an end which may be operated when the slide is in open position to maintain the same in said position to facilitate emptying the canister from the bottom thereof without requiring removal of the suction head and dumping of the canister.

Abstract: A roof drill dust collector is disclosed which comprises a closed housing in which dust-laden air is carried through a first stage dust separator, a second stage dust separator, and a third stage dust filter, before being expelled to open air. The first and second stage separators deposit dust in first and second collection chambers having a common floor, being a hinged door. The housing has means therein for automatically, in sequence, spraying streams of water on the collection chamber walls, opening the hinged door to dump the collected dust, sending a reverse pulse of air through the third stage filter, and closing the hinged door.

Abstract: An apparatus which uses suction to draw radioactive particles through a high efficiency filter and contains such filtered particles in a disposable bladder-filter unit for subsequent disposal. The bladder-filter unit prevents the escape of filtered radioactive particles to the ambient atmosphere during the operation of the apparatus and also during disposal, as well as preventing the radioactive contamination of the remainder of the apparatus.

Abstract: A filter assembly for use in dust control apparatus wherein the filter assembly employs filter barrier material suspended between opposed end frame means. In order to remove accumulated solids from the filter, stroking means, such as a cam-cam follower arrangement or a rotary eccentric loading arrrangement are operatively coupled to the filter assembly to impart reciprocatory stroking motion to one of said opposed frame means and accordingly to the filter material. The length and frequency of stroking motion is selected so as to provide parametric resonant vibration to the filter material through alternate relaxation and tension generated along the length of the material.

Abstract: An industrial sweeper has a filter unit in the debris hopper with the filter unit comprising rows of cartridges having pleated paper filter elements that are cyclically cleaned by reverse jet pulses of air without interrupting the filtering action by the main blower.

Abstract: A vacuum cleaner having a device for ensuring that the dust container is in place when it is desired to operate the cleaner. The device constitutes an arrangement on the dust container that functions to close the motor circuit thereby permitting the vacuum cleaner to be operative, however, if no dust container is present in the vacuum cleaner the motor circuit remains open and the vacuum cleaner can not be operated.

Abstract: A vacuum sweeper, particularly for collecting borings, has an upright cylindrical receptacle with a tangential inlet for admission of an air stream which carries borings and/or other solids and an open top which is overlapped by a platelike air filter disposed below a cover which is separably connected with the receptacle and has downwardly extending projections to prevent upward flexing of the filter. A side channel vacuum pump is installed in the cover and has an inlet which draws air from the receptacle via filter and a passage of the cover, and an outlet which communicates with a sound deadening annular channel provided in the cover and concentrically surrounding the rotor of the pump. The open end of the channel extends upwardly and contains a spherical float which rises therein to a level indicating the rate of air flow from the channel.

Abstract: An airtight container, having two separated compartments, including an inlet to the first compartment and a flexible, gravel pick-up tube attached to the inlet. A cyclone separator is mounted on the second compartment with its separated particle outlet discharging into the second compartment. A connecting conduit connects the outlet of the first compartment with the inlet of the cyclone, so that the first compartment is a separator for gravel and dust and the second compartment is a dust container for the cyclone. A separate, high capacity air pump has its inlet connected to the cyclone's clean air outlet causing a flow of air through the unit for picking up gravel and dust through the flexible tube. For convenience the containers may be mounted on a truck, and both containers are unloaded through a common, sealable gate at the lower portion of the containers.

Abstract: A vacuum cleaning system includes a stationary built-in power unit, a portable vacuum unit, and a flexible hose connecting the power unit and vacuum unit. Dirt and other particulate matter sucked into the system is trapped within a collection chamber of the vacuum unit and air within the collection chamber is evacuated therefrom to pass through the hose and the motor of the power unit.