# US 12,215,699 B2 · Centrifugal blower

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,215,699 B2
- Document ID: US12215699B2
- Status: Granted
- Kind: B2
- Application number: 18/532,522
- Filed: 2023-12-07
- Published: 2024-07-18
- Granted: 2025-02-04
- Earliest claimed: 2023-01-12
- Assignees: Shinano Kenshi Co., Ltd.
- Applicants: Shinano Kenshi Kabushiki Kaisha
- Inventors: Takumi Sugimoto
- Web page: https://patentgrep.com/patent/US12215699B2

## CPC

- F04D 17/16: for displacing without appreciable compression
- F04D 25/0693: {Details or arrangements of the wiring}
- F04D 25/08: the working fluid being air, e.g. for ventilation
- 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 first fitting part P of a first case 4a and a second fitting part Q of a second case 4b are concave-and-protrusion fitted to each other, a first ridge 4g and a second ridge 4i in which center lines extend in parallel to an axial direction are overlapped with each other in a radial direction at wall surfaces of the first fitting part P and the second fitting part Q facing to each other, and the first ridge 4g and the second ridge 4i mesh with each other while top parts 4g1, 4i1 thereof pressing the wall surfaces facing to each other in the circumferential direction.

## Claims

### Claim 1

A centrifugal blower including a case body that accommodates therein a centrifugal fan and a motor adapted to rotary drive the centrifugal fan, and configured to draw in air from a radial-direction middle part of the case body and discharge compressed air from a radial-direction outer side of the case body, wherein
the case body includes:
a first case configured to be assembled to cover the centrifugal fan, and provided with an intake opening part at the radial-direction middle part, and a first air blowing path formed at the radial-direction outer side; and
a second case configured to axially support the motor to be rotatable, and provided with a second air blowing path formed on an outer side of an outer-peripheral end part of the centrifugal fan in a radial direction, the second air blowing path being configured to be combined with the first air blowing path, and
the case body is assembled by a first fitting part provided to the first case and a second fitting part provided to the second case being concave-and-protrusion fitted to each other, a first ridge and a second ridge in which center lines extend in parallel to an axial direction being overlapped with each other in the radial direction at wall surfaces of the first fitting part and the second fitting part facing to each other, and the first ridge and the second ridge meshing with each other while top parts thereof pressing the wall surfaces facing to each other in the circumferential direction,
at each of circumferential-direction both side walls of the first fitting part provided projectingly in a plate shape from an outer-peripheral edge part of the first case, the first ridge in which the top part has a curved-surface shape and continues in a thickness direction is formed,
at each of both standing walls of the second fitting part having a concave shape and to be fitted to the first fitting part, the second ridge in which a width is narrower at an opening end side, and gradually becomes wider toward a bottom part side, is formed.

### Claim 2 (depends on 1)

The centrifugal blower according to claim 1, wherein a lead wire opening part from which a lead wire of the motor is led out is formed by the first fitting part and the second fitting part being fitted together.

### Claim 3 (depends on 1)

The centrifugal blower according to claim 1, wherein the case body is formed by the first case and the second case being overlapped with each other in the axial direction, and an elastically deformable lock piece provided to an outer-peripheral side part of the first case being locked to a lock part provided to an outer-peripheral side part of the second case.