# US 4,399,899 A · Clutch release bearings

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- Number: US 4,399,899 A
- Document ID: US4399899A
- Status: Granted
- Kind: A
- Application number: 06/209,055
- Filed: 1980-11-21
- Granted: 1983-08-23
- Earliest claimed: 1973-04-13
- Assignees: SKF Industrial Trading and Development Company, B.V.
- Inventors: Michael J. Breward; Andrew M. F. Ritchie
- Web page: https://patentgrep.com/patent/US4399899A

## CPC

- F16D 23/143: {Arrangements or details for the connection between the release bearing and the diaphragm}
- F16D 23/14: Clutch-actuating sleeves {or bearings}; Actuating members directly connected to clutch-actuating sleeves {or bearings}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A clutch release bearing for attachment to a diaphragm spring declutching member, the bearing comprising an outer race and an inner race, an annular series of rolling elements which roll on the raceway of each race to transmit thrust therebetween, one bearing race having a radially extending shoulder for engagement with a diaphragm spring declutching member and a sleeve attached to that race for rotation therewith about the axis of the clutch, which sleeve extends axially for connection with the side of the diaphragm spring declutching member remote from the bearing, the other bearing race having a radially extending shoulder on which a clutch operating member can act to move the bearing axially to engage and disengage the clutch.

## Claims

### Claim 1

A clutch release bearing for attachment to a diaphragm spring declutching member, the bearing comprising an outer race and an inner race, an annular series of rolling elements which roll on the raceway of each race to transmit thrust therebetween, a first of said races having a radially extending shoulder for engagement with said diaphragm spring declutching member and a sleeve attached to said first race for rotation therewith about the axis of the clutch, which sleeve extends axially or connection with the side of said diaphragm spring declutching member remote from the bearing, the other of said races having a radially extending shoulder for directly engaging a clutch operating member which is operable to move the bearing axially to engage and disengage the clutch, said shoulder on said first race being provided with a turned-over end portion to form a groove into which a suitably shaped inner periphery of said diaphragm spring declutching member is engagable, said groove having a mouth facing radially outward, and said sleeve being provided with an outwardly turned flange connected to said turned-over end portion of said shoulder.