# US 11,440,160 B2 · Guards for use with power tools and power tools including such guards > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,160 B2 - Document ID: US11440160B2 - Status: Granted - Kind: B2 - Application number: 16/105,253 - Filed: 2018-08-20 - Published: 2019-09-26 - Granted: 2022-09-13 - Earliest claimed: 2018-03-23 - Assignees: Paul Mueller Company - Applicants: Paul Mueller Company - Inventors: Robert Aaron Brown; Daniel Chronister; David Moore; William Hewett; Gregg Shirey - Web page: https://patentgrep.com/patent/US11440160B2 ## CPC - B24B 55/052: {with rotating tools} - B24B 23/028: {Angle tools} - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS ## Abstract Example guards for use with power tools and power tools including such guards. The guards include a collar structured to be removably coupled to a hand-guided electrical tool, a hood coupled to the collar, and a guard ring coupled to the collar via the hood. The guard ring extends entirely around the collar. ## Claims ### Claim 1 A guard for use with a power tool, the guard comprising: a collar structured to be removably coupled to a power tool; a hood coupled to the collar; a guard ring coupled to the collar via the hood, the guard ring extending entirely around a circumference of a rotatable component of the power tool when the guard is coupled to the power tool; and a support coupled between the guard ring and the hood adjacent the collar. ### Claim 2 (depends on 1) The guard of claim 1, wherein the support is a first support, further including a second support coupled between the guard ring and the hood, and further including a window defined between the first and second supports to enable visibility of the rotatable component of the power tool when the guard is coupled to the power tool. ### Claim 3 (depends on 2) The guard of claim 2, wherein the window is a first window, further including a second window and a third window, the second window being defined between the first support and the hood, the third window being defined between the second support and the hood, the second window disposed between the first and third windows. ### Claim 4 A guard for use with a power tool, the guard comprising: a collar structured to be removably coupled to a power tool; a hood coupled to the collar; and a guard ring coupled to the collar via the hood, the guard ring extending entirely around a circumference of a rotatable component of the power tool when the guard is coupled to the power tool, wherein the hood includes a first portion extending from the collar and a second portion extending from the first portion and tapering toward the guard ring. ### Claim 5 A guard, comprising: a collar structured to be removably coupled to a power tool having a rotatable component; a hood coupled to the collar; a guard ring coupled to the hood and at least partially surrounding the collar, the guard ring structured to enable a first amount of the rotatable component to be exposed at a first lateral end of the rotatable component and for a second amount of the rotatable component to be exposed at a second lateral end of the rotatable component, the first amount being greater than the second amount, the second lateral end opposite the first lateral end, the guard structured to surround at least a portion of the rotatable component adjacent the first lateral end and to surround at least a portion of the rotatable component adjacent the second lateral end; and a support extending between the hood and the guard ring, the support structured to increase structural rigidity of the guard ring. ### Claim 6 A guard, comprising: a collar structured to be removably coupled to a power tool having a rotatable component; a hood coupled to the collar; a guard ring coupled to the hood and at least partially surrounding the collar, the guard ring structured to enable a first amount of the rotatable component to be exposed at a first lateral end of the rotatable component and for a second amount of the rotatable component to be exposed at a second lateral end of the rotatable component, the first amount being greater than the second amount, the second lateral end opposite the first lateral end, the guard structured to surround at least a portion of the rotatable component adjacent the first lateral end and to surround at least a portion of the rotatable component adjacent the second lateral end; and a window defined between the guard ring and the hood to enable visibility of the rotatable component of the power tool when the guard is coupled to the power tool. ### Claim 7 A power tool, comprising: a body; a rotatable component; and a guard, comprising: a collar structured to be removably coupled to the body; a hood coupled to the collar; a guard ring coupled to the collar via the hood, the guard ring extending entirely around a circumference of the rotatable component of the power tool when the guard is coupled to the power tool; and a window defined between the guard ring and the collar to enable visibility of the rotatable component of the power tool. ### Claim 8 A power tool, comprising: a body; a rotatable component; and a guard, comprising: a collar structured to be removably coupled to the body; a hood coupled to the collar; a guard ring coupled to the collar via the hood, the guard ring extending entirely around a circumference of the rotatable component of the power tool when the guard is coupled to the power tool; and first and second supports extending between the hood and the guard ring, the first and second supports configured to increase structural rigidity of the hood.