Importance

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Abstract

An elastomer seal between a piston and a cylinder or a shaft of an automatic automobile transmission. An elastomer seal between a piston and a cylinder or a shaft of an automatic automobile transmission, the piston and cylinder or shaft carrying out translatory movement with respect to each other, when in operation, comprising a sealing lip which bridges a gap between the circumference of a supporting body of the piston and a sealing surface of the cylinder or shaft and is pressed against this sealing surface, the elastomer seal being bonded to the supporting body by an adhesive, is characterized in that the supporting body has a radial surface which is engaged axially by an end of the elastomer seal remote from the lip, said end especially starting at a radial spacing from the circumference of the supporting body, which spacing is dimensioned sufficiently great to block elastomer material from flowing across when the elastomer seal is molded to the piston, and that the circumference of the supporting body comprises a circumferential surface which is free of sealing material and defines a gap with the sealing surface of minimized gap width.

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First Claim