# US 2006/0124419 A1 · Lockup clutch assembly

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- Number: US 2006/0124419 A1
- Document ID: US20060124419A1
- Status: Published application
- Kind: A1
- Application number: 11/302,116
- Filed: 2005-12-14
- Published: 2006-06-15
- Earliest claimed: 2004-12-14
- Assignees: NSK-Warner K.K.
- Inventors: Yoshio Kinoshita; Shiro Takeuchi; Tatsuro Miyoshi; Shigeki Umezawa; Shun Kitahara; Tamotsu Fujii; Hiroyuki Kinpara; Kenji Maruo; Tomoyuki Miyazaki; Xiaoming Gu; Fumimasa Muramatsu; Shigeharu Nishimura; Ritsuo Toya
- Web page: https://patentgrep.com/patent/US20060124419A1

## CPC

- F16D 69/026: {containing fibres}
- F16H 45/02: with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14)
- F16H 2045/0289: {Details of friction surfaces of the lock-up clutch}
- F16H 2045/0294: {Single disk type lock-up clutch, i.e. using a single disc engaged between friction members}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16H: GEARING

## Abstract

In a lockup clutch assembly for use in a torque converter, a friction lining attached to one of a clutch piston and a front cover of the torque converter is divided into an outer-circumference-side friction lining and an inner-circumference-side friction lining. The outer-circumference-side friction lining contains as a filler diatomaceous earth in a higher proportion than the inner-circumference-side friction lining.

## Claims

### Claim 1

A lockup clutch assembly for use in a torque converter, wherein:
a friction lining attached to one of a clutch piston and a front cover of said torque converter is divided into an outer-circumference-side friction lining and an inner-circumference-side friction lining; and said outer-circumference-side friction lining contains diatomaceous earth in a higher proportion than said inner-circumference-side friction lining.

### Claim 2 (depends on 1)

A lockup clutch assembly according to claim 1, wherein said outer-circumference-side friction lining contains diatomaceous earth in a higher proportion in a sliding surface thereof than said inner-circumference-side friction lining.

### Claim 3 (depends on 1)

A lockup clutch assembly according to claim 1, wherein said outer-circumference-side friction lining and said inner-circumference-side friction lining have been subjected to pressing at a seam portion therebetween such that said outer-circumference-side friction lining and said inner-circumference-side friction lining are provided with an improved joint strength and a groove is formed at said seam portion.

### Claim 4 (depends on 1)

A lockup clutch assembly according to claim 1, wherein said outer-circumference-side friction lining is higher in thickness than said inner-circumference-side friction lining.