# US 10,442,020 B2 · Saw blade for oscillating tool or handheld tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,442,020 B2 - Document ID: US10442020B2 - Status: Granted - Kind: B2 - Application number: 14/983,124 - Filed: 2015-12-29 - Published: 2017-06-29 - Granted: 2019-10-15 - Earliest claimed: 2015-12-29 - Assignees: Robert Bosch Tool Corporation; Robert Bosch GmbH - Applicants: Robert Bosch Tool Corporation; Robert Bosch GmbH - Inventors: Christopher Ryan Dvorak; Noel Francis; Jeremy Rubens - Web page: https://patentgrep.com/patent/US10442020B2 ## CPC - B23D 61/006: {Oscillating saw blades} - B23D 51/00: Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts (constructional features of these parts per se B23Q; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00); Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends - B27B 19/006: {with oscillating saw blades; Hand saws with oscillating saw blades} - 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) - B27B: SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR (saws specially adapted for pruning or debranching A01G3/08; sawing apparatus specially adapted for felling trees A01G23/091; features not restricted to a particular type of wood saw B23D, e.g. attaching saw blades B23D51/00; machine tool frames, beds, pillars or like members, in general B23Q1/01) ## Abstract An accessory for a power tool includes a blade and a coupling. The coupling includes a blade portion, a tool portion, and a transition. The blade portion is fixedly coupled to the blade. The tool portion is configured to be removably coupled to the power tool. The tool portion also includes an opening. The transition extends between the blade portion and the tool portion, and the transition includes a first transition region, where the transition intersects with the blade portion, and a second transition region, where the transition intersects with the tool portion. The first transition region includes a first arc having a center that is arranged between the first arc and the opening, and the second transition region includes a second arc having a center that is arranged between the second arc and the opening. ## Claims ### Claim 1 An accessory for a power tool, comprising: an axis of rotation about which the accessory is configured to rotate; a blade; and a coupling, including: a blade portion fixedly coupled to the blade; a tool portion configured to be removably coupled to the power tool, the tool portion including an opening arranged about the axis of rotation; and a transition extending between the blade portion and the tool portion, the transition including a first transition region where the transition intersects with the blade portion, the transition including a second transition region where the transition intersects with the tool portion, wherein the first transition region includes a first arc having a center that is arranged between the first arc and the axis of rotation, and wherein the second transition region includes a second arc having a center that is arranged between the second arc and the axis of rotation. ### Claim 2 (depends on 1) The accessory as claimed in claim 1, wherein a radius of the first arc is approximately equal to a radius of the second arc. ### Claim 3 (depends on 1) The accessory as claimed in claim 1, wherein: the blade portion defines a first plane, and the tool portion defines a second plane. ### Claim 4 (depends on 3) The accessory as claimed in claim 3, wherein the first arc is in the first plane. ### Claim 5 (depends on 3) The accessory as claimed in claim 3, wherein the second arc is in the second plane. ### Claim 6 (depends on 3) The accessory as claimed in claim 3, wherein the transition further includes a middle portion extending between the first transition region and the second transition region. ### Claim 7 (depends on 6) The accessory as claimed in claim 6, wherein the middle portion defines a surface which is not parallel to the first plane or the second plane. ### Claim 8 (depends on 7) The accessory as claimed in claim 7, wherein the surface is not planar. ### Claim 9 (depends on 7) The accessory as claimed in claim 7, wherein the surface is at least partially dome shaped. ### Claim 10 (depends on 7) The accessory as claimed in claim 7, wherein: the surface is at least partially curved about an axis that is parallel to the axis of rotation. ### Claim 11 (depends on 7) The accessory as claimed in claim 7, wherein: the surface is at least partially curved about an axis that is perpendicular to the axis of rotation. ### Claim 12 (depends on 11) The accessory as claimed in claim 11, wherein: the surface is at least partially curved about an axis that is parallel to the axis of rotation. ### Claim 13 (depends on 1) The accessory as claimed in claim 1, wherein: the blade portion has a first blade portion end that is adjacent to the transition and a second blade portion end that is opposite the first blade portion end and is not adjacent to the transition; and the first blade portion end has a first blade portion width and the second blade portion end has a second blade portion width that is different than the first blade portion width. ### Claim 14 (depends on 13) The accessory as claimed in claim 13, wherein: the blade has a first blade end that is coupled to the coupling and a second blade end that is opposite the first blade end and is not coupled to the coupling; and the first blade end has a first blade width and the second blade end has a second blade width that is different than the first blade width. ### Claim 15 (depends on 14) The accessory as claimed in claim 14, wherein the first blade width is approximately equal to the first blade portion width. ### Claim 16 (depends on 14) The accessory as claimed in claim 14, wherein: the blade portion has a first blade portion side extending from the first blade portion end to the second blade portion end; the blade has a first blade side extending from the first blade end to the second blade end; and the first blade portion side is aligned with the first blade side. ### Claim 17 (depends on 16) The accessory as claimed in claim 16, wherein: the first blade portion side is aligned with the first blade side in a direction parallel to the axis of rotation. ### Claim 18 An accessory for a power tool, comprising: an axis of rotation about which the accessory is configured to rotate; a blade; and a coupling, including: a blade portion fixedly coupled to the blade; a tool portion configured to be removably coupled to the power tool, the tool portion including an opening arranged about the axis of rotation; and a transition extending between the blade portion and the tool portion, the transition including a first transition region where the transition intersects with the blade portion, the transition including a second transition region where the transition intersects with the tool portion, wherein: the first transition region includes a first arc having a center that is arranged between the first arc and the axis of rotation, the second transition region includes a second arc having a center that is arranged between the second arc and the axis of rotation, the blade portion has a first blade portion end that is adjacent to the transition and a second blade portion end that is opposite the first blade portion end and is not adjacent to the transition, the first blade portion end has a first blade portion width and the second blade portion end has a second blade portion width that is different than the first blade portion width, and the second blade portion width is smaller than the first blade portion width. ### Claim 19 An accessory for a power tool, comprising: an axis of rotation about which the accessory is configured to rotate; a blade; and a coupling, including: a blade portion fixedly coupled to the blade; a tool portion configured to be removably coupled to the power tool, the tool portion including an opening arranged about the axis of rotation; and a transition extending between the blade portion and the tool portion, the transition including a first transition region where the transition intersects with the blade portion, the transition including a second transition region where the transition intersects with the tool portion, wherein: the first transition region includes a first arc having a center that is arranged between the first arc and the axis of rotation, the second transition region includes a second arc having a center that is arranged between the second arc and the axis of rotation, the transition has a first transition side that extends from the tool portion to the blade portion and a second transition side that is opposite the first transition side and extends from the tool portion to the blade portion, the first transition region further includes at least one first curved portion extending from the first arc to one of the first transition side and the second transition side, and the at least one first curved portion has a different center than the first arc. ### Claim 20 (depends on 19) The accessory as claimed in claim 19, wherein: the second transition region further includes at least one second curved portion extending from the second arc to one of the first transition side and the second transition side; and the at least one second curved portion has a different center than the second arc.