# US 8,770,671 B2 · Automotive wheel

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- Number: US 8,770,671 B2
- Document ID: US8770671B2
- Status: Granted
- Kind: B2
- Application number: 13/326,476
- Filed: 2011-12-15
- Published: 2012-06-21
- Granted: 2014-07-08
- Earliest claimed: 2010-12-17
- Assignees: Central Motor Wheel Co., Ltd.
- Applicants: Yoshiyuki Nyunoya; Shinji Yamada
- Inventors: Yoshiyuki Nyunoya; Shinji Yamada
- Web page: https://patentgrep.com/patent/US8770671B2

## CPC

- B60B 3/007: {in the intermediate section}
- B60B 3/04: with a single disc body not integral with rim {, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding}
- B60B 2310/206: by stamping
- B60B 2360/102: Steel
- B60B 2900/311: Rigidity or stiffness
- B60Y 2200/11: Passenger cars; Automobiles
- B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

An automotive wheel includes a wheel disc in which a hat section is provided outside a hub mounting section. A hat inner inclined surrounding section of the hat section includes an inner convex surrounding section protruding to a surface side in a curved shape, and an inner lower concave surrounding section continuously formed with an inner peripheral edge of the inner convex surrounding section, continuously formed with an outer peripheral edge of a hub surface rounded section, and protruding to the back side in a curved shape.

## Claims

### Claim 1

An automotive wheel having a wheel disc comprising:
a generally disc-shaped hub mounting section connected to a hub of an axle,
a hub surface rounded section continuously formed with an outer peripheral edge of the hub mounting section and convexly curved in a back side, and
a hat section continuously formed with an outer peripheral edge of the hub surface rounded section and protruding to a surface side, the hat section being joined with a generally cylindrical wheel rim on which a tire is mounted,
wherein the hat section comprises:
a hat top surrounding section protruding to the surface side in a curved shape over a circumferential direction; and
a hat inner inclined surrounding section continuously formed with an inner peripheral edge of the hat top surrounding section and continuously formed with the outer peripheral edge of the hub surface rounded section, and
wherein the hat inner inclined surrounding section comprises:
an inner convex surrounding section protruding to the surface side in a curved shape; and
an inner lower concave surrounding section continuously formed with an inner peripheral edge of the inner convex surrounding section, continuously formed with the outer peripheral edge of the hub surface rounded section, and protruding to the back side in a curved shape.

### Claim 2 (depends on 1)

The automotive wheel according to claim 1, wherein the inner lower concave surrounding section is formed such that curvature thereof is smaller than curvature of the hub surface rounded section.

### Claim 3 (depends on 1)

The automotive wheel according to claim 1,
wherein the inner lower concave surrounding section, the inner convex surrounding section, and the hub surface rounded section are respectively formed to have the following relation:
Curvature of inner lower concave surrounding section<Curvature of inner convex surrounding section<Curvature of hub surface rounded section.

### Claim 4 (depends on 1)

The automotive wheel according to claim 1, wherein the inner lower concave surrounding section has the radius of curvature of 25 mm or greater and 200 mm or smaller.