# US 12,760,745 B2 · Blower device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,760,745 B2 - Document ID: US12760745B2 - Status: Granted - Kind: B2 - Application number: 18/578,380 - Filed: 2022-05-17 - Published: 2024-11-14 - Granted: 2026-10-13 - Earliest claimed: 2021-07-13 - Assignees: MINEBEA MITSUMI Inc. - Applicants: MINEBEA MITSUMI Inc. - Inventors: Yoshikazu Saka - Web page: https://patentgrep.com/patent/US12760745B2 ## CPC - F04D 29/4226: {Fan casings} - F04D 29/626: {Mounting or removal of fans} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract A blower case configured to accommodate an impeller and a bracket attached to an outer periphery of the blower case and configured to fix the blower device at a mounting target are included. At an outer peripheral surface of the blower case, a pair of rail parts extending in a direction of a rotation axis of the impeller and an engagement rib connecting the rail parts to each other at an intermediate portion in a longitudinal direction of the rail parts are provided. At the bracket, a pair of grooves fitted with the pair of rail parts and slidable in the direction of the rotation axis and a claw part disposed between the pair of grooves so as to be engaged with the engagement rib in the direction of the rotation axis are provided. A plurality of pairs of rail parts are provided along the outer periphery of the blower case, and the bracket can be selectively attached to the pair of rail parts. ## Claims ### Claim 1 A blower device comprising: a blower case configured to accommodate an impeller, the blower case comprising a blower upper case and a blower lower case; and a fixing member attached to an outer periphery of the blower case and configured to fix the blower device at a mounting target, wherein an outer peripheral surface of the blower case includes a pair of rail parts extending in a direction of a rotation axis of the impeller, and an engagement rib configured to connect the rail parts to each other at intermediate portions of the rail parts in a longitudinal direction, wherein the fixing member includes a pair of fitting parts configured to be fitted with the pair of rail parts and slidable in an axial direction which is parallel to the direction of the rotation axis and extends from the blower lower case to the blower upper case, and a claw part disposed between the pair of fitting parts and configured to be engaged with the engagement rib in the direction of the rotation axis, wherein the pair of rail parts include a plurality of pairs of rail parts disposed along the outer periphery of the blower case, wherein the fixing member is selectively attachable at the pair of rail parts, wherein the blower case includes a sidewall, a lower wall, and a curved wall configured to connect the sidewall and the lower wall, wherein a gap is provided between a boundary between the curved wall and the sidewall and lower ends of the rail parts in the axial direction, and wherein the gap comprises a surface that extends along the sidewall in a circumferential direction about the rotation axis. ### Claim 2 (depends on 1) The blower device according to claim 1, wherein the claw part is configured to get over the engagement rib to become engaged with the engagement rib by an insertion and sliding of the pair of rail parts into the pair of fitting parts, and the engagement rib is provided with an inclined rib including an inclined surface having an ascending gradient toward a direction of the insertion and sliding of the pair of rail parts into the pair of fitting parts. ### Claim 3 (depends on 1) The blower device according to claim 1, wherein a contacting part configured to come into contact with end portions of the pair of rail parts are provided at end portions of the pair of fitting parts. ### Claim 4 (depends on 1) The blower device according to claim 1, wherein the pair of rail parts include projection parts including upper end parts having convex shapes facing opposite directions to each other, and the pair of fitting parts have the same concave shapes as cross-sectional shapes of the projection parts. ### Claim 5 (depends on 1) The blower device according to claim 1, wherein a pair of ridges extending in the direction of the rotation axis are provided at the outer peripheral surface of the blower case, and the pair of rail parts are fixed so as to cover the pair of ridges. ### Claim 6 (depends on 1) The blower device according to claim 1, the blower upper case is provided with a locking piece projecting in the direction of the rotation axis, and the blower lower case is provided with a locking piece receiving part, and the locking piece is inserted into the locking piece receiving part so as to be engaged. ### Claim 7 (depends on 6) The blower device according to claim 6, wherein the locking piece receiving part has a tubular shape having a rectangular cross section, a claw part projecting to an outside in a radial direction is provided at a leading end portion of the locking piece, and a cutout part configured to be engaged with the claw part is provided at an end portion of the locking piece receiving part in the direction of the rotation axis. ### Claim 8 (depends on 1) The blower device according to claim 1, wherein one end portions of the rail parts are inserted into the fitting parts, the fixing member is slidden toward another end portions of the rail parts, and the gap is disposed between the one end portions of the rail parts and the curved wall. ### Claim 9 A blower device comprising: a fixing member attached to an outer periphery of a blower case and configured to fix the blower device at a mounting target, wherein an outer peripheral surface of the blower case includes: a pair of rail parts extending in a direction of a rotation axis of an impeller, and an engagement rib bridged at a middle of the pair of rail parts at an intermediate portion of each of the pair of rail parts in a longitudinal direction, and an inclined rib having a triangular shape and including an inclined surface having an ascending gradient toward an upper side in an axial direction is formed at a central portion of the engagement rib, wherein the fixing member includes: a pair of fitting parts configured to be fitted with the pair of rail parts and slidable in the direction of the rotation axis, and a claw part disposed between the pair of fitting parts and configured to be engaged with the engagement rib in the direction of the rotation axis, wherein the pair of rail parts include a plurality of pairs of rail parts disposed along the outer periphery of the blower case, and wherein the fixing member is selectively attachable at the pair of rail parts, wherein the blower case comprises a blower upper case and a blower lower case, the blower case includes a sidewall, a lower wall, and a curved wall configured to connect the sidewall and the lower wall, wherein a gap is provided between a boundary between the curved wall and the sidewall and lower ends of the rail parts in the axial direction, and wherein the gap comprises a surface that extends along the sidewall in a circumferential direction about the rotation axis, wherein the fixing member includes a first fixing mounting leg projecting to one end side in a direction of the rotation axis, second fixing mounting leg projecting from an end portion of the first fixing mounting leg to another end side in the direction of the rotation axis, and an engaging part projecting from an intermediate portion between the first and second mounting legs in a circumferential direction about the rotation axis, and the pair of fitting parts are disposed at the engaging part. ### Claim 10 (depends on 9) The blower device according to claim 9, wherein the engaging part includes a cutout part formed by cutting a wall portion of the engaging part into a U-shape, and the claw part projecting to an inside in a radial direction is provided at a tip end of the cutout part.