US 4,061,459 A · Combined mold element and sealing ring

Abstract

The combined mold element and sealing ring is formed of an elastically yieldable body and a rigid reinforcing non-elastic member within the body on a side spaced away from the leading edge of the body. The unit may be generally drop-shape, or otherwise, and is formed with minimal bulk. Positioning of the reinforcing member close to the outer radial portion of the elastic body reduces the manufacturing costs of the combined element as the bulk of the element may be reduced and the positioning of the rigid member in the rubber molds is facilitated. The reduced bulk also facilitates the molding of a thermoplastic pipe end over the unit to form a socket by reduced stretching of the pipe. The positioning of the rigid ring member also facilitates the anchoring effect of the combined element when used in a pipeline with internal pressure.

Claims15

Dependent claims

A combined mold element and sealing ring comprising

an annular body of elastically yieldable material, said body having opposite side portions, an inner peripheral surface defining at least one radially inwardly protruding sealing portion located between said opposite side portions, and an outer peripheral surface having an outer radially directed surface portion located between said side portions;
and
a rigid reinforcing non-elastic member disposed in said body and located in an area defined between said opposite side portions and spaced radially outside said protruding sealing portion.

Dependencies are inferred from the claim text.

Combined mold element and sealing ring

Life of this patent

Combined mold element and sealing ring

Life of this patent

Abstract

Claims15