# US 12,179,386 B2 · Power tool debris management > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,179,386 B2 - Document ID: US12179386B2 - Status: Granted - Kind: B2 - Application number: 16/691,028 - Filed: 2019-11-21 - Published: 2020-05-28 - Granted: 2024-12-31 - Earliest claimed: 2018-11-28 - Assignees: Black & Decker Inc. - Applicants: Black & Decker, Inc. - Inventors: Benjamin Schmidt; Arthur Lauer; Lars Ohde - Web page: https://patentgrep.com/patent/US12179386B2 ## CPC - B23D 59/006: {for removing or collecting chips} - B28D 7/02: for removing or laying dust, e.g. by spraying liquids; for cooling work - B23D 45/16: Hand-held sawing devices with circular saw blades - B23Q 11/0046: {by sucking} - B23Q 11/0071: {dust collectors for hand tools} - B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q) - B28D: WORKING STONE OR STONE-LIKE MATERIALS - 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 ## Abstract A power tool including a shroud for restricting the path of debris generated by a rotatable cutting disc and defining a shroud outlet opening through which the debris can be sucked by a vacuum device. The debris enters a sub-volume along a first axis and exits the sub-volume along a second axis in a different plane. A conduit having a curved wall defines the sub-volume such that debris travelling therethough undergoes a change in direction and exits the sub-volume along a direction substantially parallel with the second axis. ## Claims ### Claim 1 A power tool comprising: a rotatable support arrangement for supporting at least one cutting disc and being configured to be rotatably driven by an electric motor; a shroud for restricting the path of debris generated in use and defining a shroud outlet opening through which debris can be sucked by a vacuum device, the shroud having an internal surface; a guide part mounted to the internal surface of the shroud, the guide part having a curved wall that projects outwardly therefrom, the curved wall forming a portion of a conduit; a sub-volume defined within the shroud, an outlet from the sub-volume in fluid communication with the shroud outlet opening and an inlet thereto distal to the shroud outlet opening in fluid communication with remaining volume in the shroud; wherein the inlet to the sub-volume and the outlet from the sub-volume extend along first and second axes in different planes and the conduit, which defines, the sub-volume is configured so debris sucked through the sub-volume undergoes a change in direction by riding along the curved wall providing that debris exits the sub-volume travelling along a direction substantially parallel with the second axis, the curved wall of the conduit having a body that gradually narrows from the inlet to the outlet and defines part of a helix. ### Claim 2 (depends on 1) The power tool of claim 1, wherein the first and second axes are orthogonal. ### Claim 3 (depends on 2) The power tool of claim 2, wherein the conduit has components of curvature in first and second orthogonal planes for guiding debris riding therealong between the inlet and the outlet of the sub-volume. ### Claim 4 (depends on 3) The power tool of claim 3, wherein a first component of curvature is in a vertical plane since the outlet from the sub-volume is located higher than the inlet thereto and a second component of curvature is along a horizontal plane. ### Claim 5 (depends on 1) The power tool of claim 1, wherein the shroud comprises a first shroud part and a second shroud part that are configured to move relative to each other via at least one hinge coupling for opening and closing the shroud. ### Claim 6 (depends on 5) The power tool of claim 5, wherein the first shroud part and the second shroud part are configured to move relative to each other via a single hinge coupling. ### Claim 7 (depends on 5) The power tool of claim 5, wherein the conduit is at least partially defined by the guide part provided on one of the first and second shroud parts. ### Claim 8 (depends on 7) The power tool of claim 7, wherein the guide part is coupled to one of the first and second shroud parts. ### Claim 9 (depends on 7) The power tool of claim 7, wherein the sub-volume is a volume defined between an inner surface of the shroud and the guide part. ### Claim 10 (depends on 5) The power tool of claim 5, wherein the guide part comprises first and second guide parts, and wherein the conduit is at least partially defined by the first and second guide parts, the first guide part provided on the first shroud part and the second guide part provided on the second shroud part. ### Claim 11 (depends on 10) The power tool of claim 10, wherein at least one of the first and second guide parts are coupled to the shroud. ### Claim 12 (depends on 5) The power tool of claim 5, wherein the first shroud part and the second shroud part are maintained in a closed configuration by a securing mechanism that can be selectively released by a user. ### Claim 13 (depends on 1) The power tool of claim 1, wherein the shroud outlet opening extends through a side wall of the shroud. ### Claim 14 (depends on 1) The power tool of claim 1, wherein the power tool is a rotary cutting tool for cutting masonry. ### Claim 15 (depends on 1) The power tool of claim 1, wherein the power tool is a wall chaser. ### Claim 16 (depends on 1) The power tool of claim 1, wherein the shroud comprises an upper shroud member pivotally coupled to and biased away from a lower shroud member.