Trelleborg Ab

Sebastien Huchet

Bernard Marhic

Jean Luc Bouhour

A protective bellows formed by injection (blow) moulding has a large-diameter end with a fixing collar ( ) for sealingly embracing an externally tri-lobed surface of a housing of an articulation joint for a motor vehicle transmission. The fixing collar ( ) comprises a circumferential outer surface and an inner surface ( ). The inner surface ( ) is made up of part-circumferentially curved surface portions ( A, B, C) for engaging the three lobes of the housing, and three equi-angularly spaced inwardly curved integral surface portions ( A, B, C) which are shaped to engage the spaces or grooves between the three lobes on the housing. The resilient material between the outer surface ( ) and each inwardly curved surface portion ( A, B, C) is formed with several slots ( ) arranged with their depths directed in a radial direction. The slots ( ) aid the de-moulding process.

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Nantes, France

Sebastien Huchet