Abstract: A dust collector arrangement has a dust separator supported on a frame, with a lid for the dust collection barrel is mounted onto the frame below it. The lid is supported at a fixed elevation above the surface of the shop floor to create a space or clearance between the rim of the dust collection barrel and the lid. The barrel is supported on casters, and can be rolled into place under the rim, and can be rolled out for emptying. Over-center latches positioned at intervals around the upper part of the barrel side wall, engage corresponding structure on the lid. These pull the barrel upwards against the lid and with the barrel casters lifted off the floor surface. The latch members release to lower the barrel for emptying.

Abstract: A dust collection arrangement employs a variable frequency drive to supply AC to its fan motor. A current sensor measures the current drawn by the motor, and this is compared with a preset value. The variable frequency drive adjusts the frequency of the AC applied to the motor to maintain the motor current at the preset level. This keeps the flow of air in the system optimal as dust producing tools are added or taken off.

Abstract: A vacuum bag hold-down arrangement for a dust collection system maintains a negative pressure in the space between a dust collection drum and a plastic film liner or bag in the drum. A cyclonic separator at the station separates the dust from an air flow and deposits it into the liner in the drum. The hold-down arrangement employs a vacuum pump producing about 1 to 3 psig negative pressure. A vacuum conduit extends from the pump through a penetration in the drum and into the space between wall of the drum and the liner bag. A porous pad, e.g., open cell foam, is situated over the vacuum conduit and separates the bag liner from the vacuum conduit. This distributes the air flow into the vacuum conduit and creates a more uniform grip of the liner or bag to the drum.

Abstract: A cyclonic portable vacuum cleaner/dust collector for workshop or other use has a conic body that is supported on a hand cart or dolly. A funnel shaped divider plate within the conic body divides it into a cyclonic chamber between the divider plate and the lower nose, and a filter chamber between the divider plate and a motor plate that closes the upper mouth of the conic body. The filter chamber contains a filter cartridge. A vacuum air pump is mounted on the motor plate, and is covered by a shroud or housing. Clean, filtered air is exhausted into the ambient. Process dust settled into a dust collection drum supported beneath the nose of the conic body. A pulse cleaning arrangement serves for periodic filter cleaning. The supporting cart can be wheeled or can use a wall bracket for wall mounting.

Abstract: A portable dust collector for woodshop or other use with portable tools has a conic body that is supported on a tripod carriage formed of three legs attaching to gussets at the sides of the conic body. A divider plate within the conic body divides it into a cyclonic chamber between the divider plate and the lower nose, and a fan chamber between the divider plate and a motor plate that closes the upper mouth of the conic body. A final filter cartridge is fitted onto the outlet pipe, so that the dust collector exhausts clean, filtered air into the ambient. The final filter may be supported from a 90-degree elbow, with a removable tray for catching process dust that is knocked off the interior of the filter. The process dust in the cyclone settles into a dust collection barrel supported on a barrel cradle.

Abstract: A portable dust collector for woodshop or other use with portable tools has a conic body that is supported on a tripod carriage formed of three legs attaching to gussets at the sides of the conic body. A divider plate within the conic body divides it into a cyclonic chamber between the divider plate and the lower nose, and a fan chamber between the divider plate and a motor plate that closes the upper mouth of the conic body. A final filter cartridge is fitted onto the outlet pipe, so that the dust collector exhausts clean, filtered air into the ambient. The final filter may be supported from a 90-degree elbow, with a removable tray for catching process dust that is knocked off the interior of the filter. The process dust in the cyclone settles into a dust collection barrel supported on a barrel cradle.

Abstract: A shop vacuum cleaner has a series of dust separation stages, with the large majority of the dust being preseparated in a cyclonic separator and deposited into a first drum or barrel. The remaining dust that is carried in the air stream is filtered out in a pre-filter in a second vacuum cleaner drum. A final filter cartridge is fitted onto the intake of the vacuum head. The vacuum cleaner machine exhausts clean, filtered air into the ambient.

Abstract: A portable dust collection system for a wood shop or other dust producing environment is employed with a sander, power saw, router or other dust-producing tool such as a woodworking tool. A movable platform has a vertical intake pipe supporting a head portion formed with a shroud. A centrifugal impeller drives the intake air stream plus any entrained particles into one or more cyclonic separators, which deposit the dust in a respective drum supported on the platform beneath the cyclone. The air inlet from the tool enters the vertical pipe at a point partway up the pipe, so that large particles drop to the bottom end of the pipe, where a clean-out door is provided. The exhaust or discharge air from the cyclonic separator(s) passes out through a filter cartridge to the ambient. A deflector plate prevents the dust from eddying back into the separator.

Abstract: A riding floor sander for large hardwood floor surfaces, such as gymnasiums and dance floors, has a powered cart with one or more sanding machines connected to it. A blower picks up the process waste in a stream of air and and moves it to a cyclone separator that is mounted on the riding sanding machine. There the dust is separated from the air stream, leaving clean air to be returned to the ambient. The dust that falls from the cyclone into a dust collection drum or bag on the cart. There can be are primary cyclonic separators on the sanding machines, and a cyclonic separator on the back of the riding cart. Alternatively, the cyclone and drum may be located remote from the riding sander, and can have an in-line auxiliary pump or impeller.

Abstract: A portable dust collection system for a wood shop or other dust producing environment is employed with a sander, power saw, router or other dust-producing tool such as a woodworking tool. A movable platform has a vertical intake pipe supporting a head portion formed with a shroud. A centrifugal impeller drives the intake air stream plus any entrained particles into one or more cyclonic separators, which deposit the dust in a respective drum supported on the platform beneath the cyclone. The air inlet from the tool enters the vertical pipe at a point partway up the pipe, so that large particles drop to the bottom end of the pipe, where a clean-out door is provided. The exhaust or discharge air from the cyclonic separator(s) passes out through a filter cartridge to the ambient. A deflector plate prevents the dust from eddying back into the separator.

Abstract: An auxiliary dust collection system can be interposed between a sander or other dust producing tool and a vacuum source, e.g., shop vacuum. This auxiliary system has a cyclonic separator connected by a flexible hose to the tool and by another hose to the vacuum source. The cone of the separator is mounted onto the lid of a drum into which the dust precipitates. For a tool that has its own blower, the vacuum source can be omitted, and the air leaving the outlet duct of the separator can be filtered and returned to the ambient. A drop in silencer formed of a sleeve or tube of acoustic foam can be positioned into the inlet side of a filter cartridge following a cyclonic separator. The silencer absorbs a significant fraction of the process noise.

Abstract: A dust collection system for portable sanding or grinding equipment employs a cyclone separator mounted directly on the tool or machine, with a dust outlet duct at the narrow lower end of the cyclone, and a cartridge air filter mounted on the top of the cyclone. The filter returns the air flow from the machine to the ambient air in the vicinity of the tool. The dust is concentrated in the cyclone, and a small volume air flow then moves the dust through an elongated flexible hose or duct to a remote dust collection station. An air pump at the remote dust collection station provides sufficient air flow to draw the small volume of air plus entrained dust from the tool-mounted cyclonic separator. A cyclonic separator at the remote station separates this dust from the air flow and deposits it in a collection tank or drum.

Abstract: A dust collection system for portable sanding or grinding equipment employs a cyclone separator mounted directly on the tool or machine, with a dust outlet duct at the narrow lower end of the cyclone, and a cartridge air filter mounted on the top of the cyclone. The filter returns the air flow from the machine to the ambient air in the vicinity of the tool. The dust is concentrated in the cyclone, and a small volume air flow then moves the dust through an elongated flexible hose or duct to a remote dust collection station. An air pump at the remote dust collection station provides sufficient air flow to draw the small volume of air plus entrained dust from the tool-mounted cyclonic separator. A cyclonic separator at the remote station separates this dust from the air flow and deposits it in a collection tank or drum.

Abstract: A dust collection system for portable sanding or grinding equipment employs a cyclone separator mounted directly on the tool or machine, with a dust outlet duct at the narrow lower end of the cyclone, and a cartridge air filter mounted on the top of the cyclone. The filter returns the air flow from the machine to the ambient air in the vicinity of the tool. The dust is concentrated in the cyclone, and a small volume air flow then moves the dust through an elongated flexible hose or duct to a remote dust collection station. An air pump at the remote dust collection station provides sufficient air flow to draw the small volume of air plus entrained dust from the tool-mounted cyclonic separator. A cyclonic separator at the remote station separates this dust from the air flow and deposits it in a collection tank or drum.