A dust collection cup allows a bit tip to be viewable without being detached or replaced. A dust collection cup is attachable to a front cylindrical portion of a hammer drill. The dust collection cup in an attached state allows a bit attached to the front cylindrical portion to extend through the dust collection cup. The dust collection cup includes an attachment attachable to the front cylindrical portion, and a body connectable to the attachment. The body includes an extendable unit including at least a portion in an axial direction retaining a predetermined length.

A dust collection box for a dust extractor includes first and second air inlet chambers, an air inlet aperture through which air is drawn into the first air inlet chamber, an air outlet aperture through which air is dawn out of the second air outlet chamber, an air intermediate chamber formed in the housing, and a filter mounted within the housing. The filter includes a first part through which air passes from the air inlet chamber to the air outlet chamber, and a second part through which air passes from the air inlet chamber to the air intermediate chamber. An ambient air aperture is formed in the wall of the housing. A valve disposed proximate the ambient air aperture is switchable to connect the air intermediate chamber to only one of the air outlet chamber or the ambient air aperture.

A system and method for capturing resultant dust from power tool operation are disclosed. The system comprises a device that includes a housing with a substantially cylindrical shape. The housing has a first end that tapers to an opening for a tool bit and at least one suction port that opens into an interior volume of the housing. The housing has a second end configured to couple to a power tool. An air intake passage attaches to the exterior surface of the housing body such that an interior volume of the air intake passage connects to an interior volume of the housing. An exit passage is coupled to the air intake passage and is configured to couple to a vacuum.

A dust and debris extraction device for the purpose of capturing dust and debris created by a chisel held by a power tool has an opening for a chisel to pass through at the front and is guided upward by a sleeve that passes out the top of the body of the device. The extraction end of the device has a locking mechanism to keep a hose going to a negative air source attached. The dust and debris extraction device may either free float on the shank of the chisel or be fixed to the power tool with a bracket.

An impact tool is provided which has a driving mechanism 120, 140 that drives a tool bit 119, a motor 110 that drives the driving mechanism 120, 140, an inner housing 103 that houses the driving mechanism 120, 140, an outer housing 101 that has an internal space for housing the inner housing 103 and the motor 110, an opening 193 that leads from the outside to the internal space of the outer housing 101, and a covering member 195 that covers the opening 193.

An impact tool is provided which has a driving mechanism, that drives a tool bit, a motor that drives the driving mechanism, an inner housing that houses the driving mechanism, an outer housing that has an internal space for housing the inner housing and the motor, an opening that leads from the outside to the internal space of the outer housing, and a covering member that covers the opening.

A self-suction dust collection attachment including a dust collection motor and a fan can be mechanically coupled and electrically connected to multiple types of power tools. A dust collection attachment attachable to a first power tool includes a casing, a suction portion, a dust collector that captures dust sucked through the suction portion, a fan that generates a suction force in the suction portion, a dust collection motor that rotates the fan, and an adapter attachable to at least a second power tool and detachably attachable to the casing. The adapter includes a mechanical coupler that couples the casing and the second power tool and an electrical connector that electrically connects the dust collection attachment and the second power tool when the dust collection attachment is coupled to the second power tool.

A dust collection system for a power tool includes a power tool including an AC motor drivable with a switch and a tool-body power path extending from utility power to the AC motor, and a dust collection attachment attachable to the power tool to collect dust produced by the power tool in use and including a suction portion, a dust collector, a fan, a DC motor, a battery pack, and a dust-collector power path extending from the battery pack to the DC motor and electrically separate from the tool-body power path with the dust collection attachment attached to the power tool. The power tool includes a responsive unit that drives the DC motor in response to an operation on the switch with the responsive unit electrically separate from a signal path of the switch.

A power tool and a dust collection attachment have their respective batteries as power supplies and can continue operating when one of the batteries is depleted. A dust collection system for a power tool includes a power tool including a switch, a tool-body DC motor, a tool-body controller, and a tool-body battery, and a dust collection attachment attachable to the power tool and including a suction portion, a dust collector, a fan, a dust-collector DC motor, a dust-collector controller, and a dust-collector battery. When the dust collection attachment is attached to the power tool, the tool-body controller and the dust-collector controller are electrically connected to each other. The dust-collector controller uses the tool-body battery singly to supply power to the tool-body DC motor and the dust-collector DC motor or uses the dust-collector battery singly to supply power to the tool-body DC motor and the dust-collector DC motor.

A dust extractor including a nozzle, an extractor housing, a dust tube coupled to the nozzle and slidable between an extended position and a retracted position relative to the extractor housing, and a dust container selectively coupled to the dust extractor housing. A transfer tube is configured to direct air from the dust tube to the dust container, wherein the dust tube includes a cut-out portion aligned with the transfer tube and a cover slidably coupled to the dust tube to selectively enclose the cut-out portion.