# US 7,613,596 B2 · Tire profile designing method

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- Number: US 7,613,596 B2
- Document ID: US7613596B2
- Status: Granted
- Kind: B2
- Application number: 11/230,565
- Filed: 2005-09-21
- Published: 2006-06-01
- Granted: 2009-11-03
- Earliest claimed: 2004-12-01
- Assignees: Sumitomo Rubber Industries, Ltd.
- Inventors: Takuya Yamamoto; Masatoshi Tanaka
- Web page: https://patentgrep.com/patent/US7613596B2

## CPC

- B60C 11/01: Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
- B60C 3/04: characterised by the relative dimensions of the section, e.g. low profile (B60C3/06 takes precedence)
- B60C 11/00: Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C 11/0083: {characterised by the curvature of the tyre tread}
- B60C 19/00: Tyre parts or constructions not otherwise provided for
- B60C 99/006: {Computer aided tyre design or simulation}
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES

## Abstract

A tire profile (12) includes a tread (16), a shoulder (18), a flat portion (20), an upper sidewall (22) and a lower sidewall (24). The shoulder (18) is provided in contact with a tread (16) at a point (Pa). The flat portion (20) is provided in contact with the shoulder (18) at a point (Pb). The upper sidewall (22) is provided in contact with the flat portion (20) at a point (Pc). A system including an input portion and a calculating portion is used for designing the profile (12). When the numeric values of a radius of curvature (R1) of the shoulder (18) and an inclination angle (θ) of the flat portion (20) are input by the input portion, the calculating portion calculates a length (L) of the flat portion (20) and a radius of curvature (R2) of the upper sidewall (22). Based on the input numeric values and the calculated numeric values, the profile (12) is drawn by CAD software.

## Claims

### Claim 1

A method of designing a tire profile including a tread, a shoulder, a sidewall, and an adjustment portion between the shoulder and the sidewall, and wherein the adjustment portion is flat, the method comprising the steps of:
inputting numeric values of a radius of curvature of the shoulder and an inclination angle of the adjustment portion; and
using a computer to calculate numeric values of a length of the adjustment portion and a radius of curvature of an upper sidewall based on the input numeric values in order to provide the adjustment portion being in contact with the shoulder at an upper end and being in contact with the sidewall at a lower end.

### Claim 2 (depends on 1)

The designing method according to claim 1, further comprising the step of drawing a tire profile by CAD software or FEM software based on the input numeric values and the calculated numeric values.

### Claim 3

A method of designing a tire profile including a tread, a shoulder, a sidewall, and an adjustment portion between the shoulder and the sidewall, and wherein the adjustment portion is flat, the method comprising the steps of:
inputting numeric values of a radius of curvature of the shoulder and a radius of curvature of an upper sidewall; and
using a computer to calculate numeric values of an inclination angle of the adjustment portion and a length of the adjustment portion based on the input numeric values in order to provide the adjustment portion being in contact with the shoulder at an upper end and being in contact with the sidewall at a lower end.

### Claim 4 (depends on 3)

The designing method according to claim 3, further comprising the step of drawing a tire profile by CAD software or FEM software based on the input numeric values and the calculated numeric values.

### Claim 5

A method of designing a tire profile including a tread, a shoulder, a sidewall, and an adjustment portion between the shoulder and the sidewall, and wherein the adjustment portion is flat, the method comprising the steps of:
inputting numeric values of a radius of curvature of the shoulder and a length of the adjustment portion; and
using a computer to calculate numeric values of an inclination angle of the adjustment portion and a radius of curvature of an upper sidewall based on the input numeric values in order to provide the adjustment portion being in contact with the shoulder at an upper end and being in contact with the sidewall at a lower end.

### Claim 6 (depends on 5)

The designing method according to claim 5, further comprising the step of drawing a tire profile by CAD software or FEM software based on the input numeric values and the calculated numeric values.

### Claim 7

A method of designing a tire profile including a tread, a shoulder, a sidewall, and an adjustment portion between the shoulder and the sidewall, and wherein the adjustment portion is flat, the method comprising the steps of:
inputting numeric values of a length of the adjustment portion and a radius of curvature of an upper sidewall; and
using a computer to calculate numeric values of a radius of curvature of the shoulder and an inclination angle of the adjustment portion based on the input numeric values in order to provide the adjustment portion being in contact with the shoulder at an upper end and being in contact with the sidewall at a lower end.

### Claim 8 (depends on 7)

The designing method according to claim 7, further comprising the step of drawing a tire profile by CAD software or FEM software based on the input numeric values and the calculated numeric values.