# US 2019/0168348 A1 · Accessory for an electric power tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168348 A1 - Document ID: US20190168348A1 - Status: Published application - Kind: A1 - Application number: 16/269,290 - Filed: 2019-02-06 - Published: 2019-06-06 - Earliest claimed: 2013-10-21 - Assignees: Techtronic Power Tools Technology Limited - Applicants: Techtronic Power Tools Technology Limited - Inventors: Tsz Kin WONG; Kwok Ting MOK - Web page: https://patentgrep.com/patent/US20190168348A1 ## CPC - B23Q 11/0071: {dust collectors for hand tools} - B25F 5/003: {Stops for limiting depth in rotary hand tools (for drilling tools: B23B49/003)} - B25F 5/026: {in the form of an auxiliary handle (B25F5/024 takes precedence)} - B23Q 11/00: Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work {(accessories specially designed for sawing machines or sawing devices B23D59/00)}; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools (in respect of boring or drilling machines B23B47/32 takes precedence; safety devices in general F16P) - B23Q 11/0046: {by sucking} - B25F 5/00: Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for - B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} ## Abstract An accessory for an electric drill is disclosed as including a dust box for receiving abraded materials produced by an electric drill on a workpiece, the dust box including an internal cavity, a first longitudinal end with a first opening communicating with the internal cavity, an opposite second longitudinal end with a second opening communicating with the internal cavity, and a brush or a disc. When a drill bit of the electric drill is received into the internal cavity of the dust box through the second opening, the brush or disc is releasably engageable with the drill bit for simultaneous rotational movement about a longitudinal axis of the drill bit. ## Claims ### Claim 1 An accessory for an electric power tool, said accessory including: a housing for receiving abraded materials produced by an electric power tool on a workpiece, wherein said housing includes an internal cavity, a first longitudinal end with a first opening communicating with said internal cavity, an opposite second longitudinal end with a second opening communicating with said internal cavity, and at least one movable member comprising a plurality of bristles, and wherein when a utility part of said electric power tool is received within said internal cavity through said second opening, said movable member is releasably engageable with said utility part of said electric power tool for substantially simultaneous rotational movement about a longitudinal axis of said utility part. ### Claim 2 (depends on 1) An accessory according to claim 1 wherein said movable member includes a hole for releasable engagement with said utility part of said electric power tool. ### Claim 3 (depends on 2) An accessory according to claim 2 wherein said hole of said movable member is frictionally engageable with said utility part of said electric power tool. ### Claim 4 (depends on 1) An accessory according to claim 1 wherein, during substantially simultaneous rotational movement of said movable member and said utility part of said electric power tool, said movable member allows axial movement of said utility part of said electric power tool relative to said movable member. ### Claim 5 (depends on 1) An accessory according to claim 1 wherein said movable member is within a mounting frame in said housing, and wherein said movable member is freely movable between said mounting frame and said first longitudinal end of said housing. ### Claim 6 (depends on 1) An accessory according to claim 1 wherein said housing includes exhaust opening for connection with a suction source. ### Claim 7 (depends on 1) An accessory according to claim 1 wherein said first opening and second opening of said housing are co-axial with each other. ### Claim 8 (depends on 7) An accessory according to claim 7 wherein, when said utility part of said electric power tool is received within said internal cavity, said first opening and said second opening of said housing are co-axial with said longitudinal axis of said utility part. ### Claim 9 (depends on 1) An accessory according to claim 1 further including means for releasably engaging said accessory with said electric power tool. ### Claim 10 (depends on 9) An accessory according to claim 9 wherein said engaging means includes an annular member releasably engageable with said electric power tool to substantially align said utility part of said electric power tool with said first opening and second opening of said housing. ### Claim 11 (depends on 10) An accessory according to claim 10 further including a collar releasably engageable with said annular member for reducing the internal diameter of said annular member. ### Claim 12 (depends on 1) An accessory according to claim 1 wherein said housing is generally cylindrical in shape. ### Claim 13 (depends on 1) An accessory according to claim 1 wherein said housing is of a transverse cross section of a cut-circle shape. ### Claim 14 (depends on 9) An accessory according claim 9 wherein said engaging means is movable relative to said housing to vary the length of said utility part of said electric power tool extending out of said housing through said first opening of said housing. ### Claim 15 (depends on 14) An accessory according to claim 14 wherein said engaging means is movable relative to said housing along a rail member. ### Claim 16 (depends on 14) An accessory according to claim 14 further including a handle movable simultaneously with said engaging means. ### Claim 17 (depends on 16) An accessory according to claim 16 wherein said handle is pivotable relative to said engaging means about an axis parallel to a longitudinal axis of said housing. ### Claim 18 (depends on 16) An accessory according to claim 16 wherein said engaging means and said handle are releasably engaged with said rail member. ### Claim 19 An accessory for an electric power tool, said accessory including: a housing for receiving abraded materials produced by an electric power tool on a workpiece, and means for releasably engaging said accessory with said electric power tool, wherein said engaging means is movable relative to said housing along a rail member including a channel for releasably receiving a plastic anchor, and wherein said accessory further includes means for setting the maximum distance through which said engaging means is movable relative to said housing. ### Claim 20 (depends on 19) An accessory according to claim 19 wherein said engaging means is movable relative to said housing between a first position on said rail member and a second position on said rail member, wherein the distance between said housing and said first position is longer than the distance between said housing and said second position, and wherein said engaging means is biased towards said first position. ### Claim 21 (depends on 20) An accessory according to claim 20 further including a stopper selectively positionable along said rail member to set said second position. ### Claim 22 (depends on 20) An accessory according to claim 20 wherein a length of said elongate member is the distance between said first position and said second position. ### Claim 23 (depends on 20) An accessory according to claim 20 further including means for selectively adjusting said first position. ### Claim 24 An accessory for an electric power tool with a utility part, said accessory including: means for releasably engaging said accessory with an electric power tool with a utility part, and means for setting, when said electric tool is engaged with said engaging means, a maximum depth of entry of said utility part of said electric power tool into a workpiece, wherein said setting means includes means for abutting said workpiece to prevent further entry of said utility part into said workpiece when said utility part of said electric power tool reaches said set maximum depth of entry into said workpiece, wherein said abutting means includes a cartridge member and a rod member movable relative to each other between an extended configuration and a retracted position, and wherein said cartridge member is adapted to receive a plug. ### Claim 25 (depends on 24) An accessory according to claim 24 wherein said set maximum depth of entry of said utility part into said workpiece is determined by the distance between a free end of said utility part of said electric power tool and said abutting means. ### Claim 26 (depends on 25) An accessory according to claim 25 wherein said engaging means includes an annular engagement part for releasably engaging with said electric power tool. ### Claim 27 (depends on 24) An accessory according to claim 24 wherein said abutting means is movable relative to said engaging means. ### Claim 28 (depends on 27) An accessory according to claim 27 wherein said abutting means is movable relative to said engaging means along a longitudinal axis of said abutting means.