# US 2014/0196921 A1 · Power tool and auxiliary handle member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196921 A1 - Document ID: US20140196921A1 - Status: Published application - Kind: A1 - Application number: 13/743,746 - Filed: 2013-01-17 - Published: 2014-07-17 - Earliest claimed: 2013-01-17 - Assignees: Makita Corporation - Applicants: Makita Corporation - Inventors: Tomoyuki KONDO; Takao KUROYANAGI - Web page: https://patentgrep.com/patent/US20140196921A1 ## CPC - B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} - B25F 5/026: {in the form of an auxiliary handle (B25F5/024 takes precedence)} - B25G 1/00: Handle constructions - 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)} - B25G: HANDLES FOR HAND IMPLEMENTS (attaching the blades or the like to handles of hand tools for soil working A01B1/22; handles of hand implements for harvesting A01D1/14; handles integral with brushware A46B) ## Abstract A power tool includes a main body portion and a grip portion. The main body portion includes a motor unit. The grip portion extends from the main body portion between a front end and a rear end of the main body portion. The main body portion further includes an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. An auxiliary handle member is coupled to the auxiliary handle mounting structure of the main body portion. ## Claims ### Claim 1 A power tool comprising: a main body portion including a motor unit; and a grip portion extending from the main body portion between a front end and a rear end of the main body portion, the main body portion further including an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. ### Claim 2 (depends on 1) The power tool according to claim 1, further comprising an auxiliary handle member coupled to the auxiliary handle mounting structure of the main body portion. ### Claim 3 (depends on 2) The power tool according to claim 2, wherein the auxiliary handle member includes an auxiliary grip portion and a fixing portion coupled to the auxiliary grip portion, the fixing portion being fixed to the auxiliary handle mounting structure of the main body portion. ### Claim 4 (depends on 1) The power tool according to claim 1, further comprising a power tool chuck disposed in a front side of the main body portion. ### Claim 5 (depends on 1) The power tool according to claim 1, wherein the auxiliary handle mounting structure of the main body portion includes a generally cylindrical surface. ### Claim 6 (depends on 5) The power tool according to claim 5, wherein the auxiliary handle mounting structure of the main body portion further includes an engagement structure formed in the generally cylindrical surface. ### Claim 7 (depends on 6) The power tool according to claim 6, wherein the engagement structure of the auxiliary handle mounting structure of the main body portion includes a recess formed in the generally cylindrical surface. ### Claim 8 (depends on 2) The power tool according to claim 2, wherein the auxiliary handle mounting structure of the main body portion includes a generally cylindrical surface, and the auxiliary handle member includes an auxiliary grip portion and a fixing portion coupled to the auxiliary grip portion, the fixing portion including an inner surface that matches the generally cylindrical surface of the main body portion. ### Claim 9 (depends on 8) The power tool according to claim 8, wherein the auxiliary handle mounting structure of the main body portion further includes an engagement structure formed in the generally cylindrical surface, and the fixing portion of the auxiliary handle member includes an engagement structure that engages with the engagement structure formed in the generally cylindrical surface of the auxiliary handle mounting structure. ### Claim 10 (depends on 9) The power tool according to claim 9, wherein the engagement structure of the auxiliary handle mounting structure of the main body portion includes a recess formed in the generally cylindrical surface, the engagement structure of the fixing portion of the auxiliary handle member includes a protrusion that fits in the recess formed in the generally cylindrical surface of the auxiliary handle mounting structure. ### Claim 11 (depends on 1) The power tool according to claim 1, wherein the auxiliary handle mounting structure of the main body portion defines a through-hole configured and arranged to accommodate a part of an auxiliary handle member therein. ### Claim 12 (depends on 11) The power tool according to claim 11, wherein the through-hole of the auxiliary handle mounting structure extends along a direction substantially perpendicular to a rotational axis of the motor unit. ### Claim 13 (depends on 2) The power tool according to claim 2, wherein the auxiliary handle mounting structure of the main body portion defines a through-hole, and the auxiliary handle member includes an auxiliary grip portion and a fixing portion coupled to the auxiliary grip portion, the fixing portion including an insertion section extending through the through-hole of the auxiliary handle mounting structure of the main body portion. ### Claim 14 (depends on 1) The power tool according to claim 1, wherein the auxiliary handle mounting structure is disposed at a position at least partially overlapping the motor unit as viewed along a direction perpendicular to a rotational axis of the motor unit. ### Claim 15 (depends on 14) The power tool according to claim 14, wherein the motor unit includes a rotor and a stator, and the auxiliary handle mounting structure is disposed at the position at least partially overlapping at least one of the rotor and the stator as viewed along the direction perpendicular to the rotational axis of the motor unit. ### Claim 16 (depends on 1) The power tool according to claim 1, further comprising a rechargeable battery with a maximum voltage of 12.0 V or less. ### Claim 17 (depends on 1) The power tool according to claim 1, wherein the motor unit is enclosed by a generally cylindrical motor casing member disposed inside an outer housing cover of the main body portion. ### Claim 18 A power tool comprising: a main body portion including a motor unit; and a grip portion extending from the main body portion between a front end and a rear end of the main body portion, the main body portion further including an auxiliary handle mounting structure disposed at a position at least partially overlapping the motor unit as viewed along a direction perpendicular to a rotational axis of the motor unit. ### Claim 19 (depends on 18) The power tool according to claim 18, further comprising an auxiliary handle member coupled to the auxiliary handle mounting structure of the main body portion. ### Claim 20 A power tool comprising: a main body portion including a motor unit; and a grip portion extending from the main body portion, the main body portion further including an auxiliary handle mounting structure defining a through-hole extending through the main body portion. ### Claim 21 (depends on 20) The power tool according to claim 20, further comprising an auxiliary handle member coupled to the auxiliary handle mounting structure of the main body portion such that a part of the auxiliary handle member extends through the through-hole of the main body portion. ### Claim 22 (depends on 20) The power tool according to claim 20, wherein the through-hole extends in a direction substantially perpendicular to a rotational axis of the motor unit. ### Claim 23 (depends on 20) The power tool according to claim 20, wherein the through-hole is defined by a pair of openings formed in an outer housing cover on each side of the main body portion and a hollow space inside the main body portion extending between the openings. ### Claim 24 (depends on 20) The power tool according to claim 20, wherein the auxiliary handle mounting structure defines an additional through-hole extending through the main body portion. ### Claim 25 (depends on 24) The power tool according to claim 24, wherein the through-hole and the additional through-hole extend along axes that are parallel to each other. ### Claim 26 (depends on 24) The power tool according to claim 24, further comprising an auxiliary handle member coupled to the auxiliary handle mounting structure of the main body portion such that parts of the auxiliary handle member extend through the through-hole and the additional through-hole of the main body portion. ### Claim 27 (depends on 26) The power tool according to claim 26, wherein the auxiliary handle member includes an auxiliary grip portion and a fixing portion coupled to the auxiliary grip portion, the fixing portion including a pair of insertion sections respectively extending through the through-hole and the additional through-hole of the auxiliary handle mounting structure of the main body portion. ### Claim 28 (depends on 27) The power tool according to claim 27, wherein the fixing portion of the auxiliary handle member further includes a bridge section extending between the insertion sections, the bridge section having an inner surface that generally matches a contour of an outer surface of the main body portion. ### Claim 29 (depends on 28) The power tool according to claim 28, wherein the insertion sections and the bridge section of the fixing portion of the auxiliary handle member are formed by a strip element, with the insertion sections extending substantially straight and parallel to each other and the bridge section being curved to match the contour of the outer surface of the main body portion. ### Claim 30 A power tool comprising: a main body portion including a motor unit; a grip portion extending from the main body portion; and a rechargeable battery with a maximum voltage of 12.0 V or less, the main body portion including an auxiliary handle mounting structure configured and arranged to be coupled to an auxiliary handle member. ### Claim 31 (depends on 30) The power tool according to claim 30, further comprising an auxiliary handle member coupled to the auxiliary handle mounting structure of the main body portion. ### Claim 32 A power tool comprising: a housing including a main body portion and a grip portion extending from the main body portion; and a motor assembly disposed in the main body portion of the housing, the motor assembly including a motor unit and a generally cylindrical motor casing member enclosing the motor unit, the main body portion of the housing including an auxiliary handle mounting structure configured and arranged to be coupled to an auxiliary handle member. ### Claim 33 (depends on 32) The power tool according to claim 32, further comprising an auxiliary handle member coupled to the auxiliary handle mounting structure of the main body portion. ### Claim 34 An auxiliary handle member adapted to be coupled to a housing of a power tool, the auxiliary handle member comprising: an auxiliary grip portion; and a fixing portion coupled to the auxiliary grip portion, the fixing portion including an insertion section configured and arranged to pass through the housing of the power tool. ### Claim 35 (depends on 34) The auxiliary handle member according to claim 34, wherein the fixing portion further includes a bridge section having an inner surface configured and arranged to generally match an outer surface of the housing of the power tool.