Sealing ring for sealing a pipe joint
AssigneeForsheda AB
InventorChrister Bengtsson
Life of this patent
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Abstract
A sealing ring for sealing in a pipe joint an annular space between a socket end and a spigot end introduced therein comprises an annular sealing portion (8) consisting of elastically yielding sealing material and a substantially annular reinforcing portion (10) consisting of a material which is rigid in relation to the elastically yieldable material, the sealing portion (8) and the reinforcing portion (10) being fixedly connected with each other at the connection surface (18). The outer surface (40) of the sealing ring has a surface portion which is of a shape corresponding to the shape of the connection portion as parallelly displaced in the axial direction of the ring. The invention also relates to a mould for manufacturing such a sealing ring by means of injection moulding.
Claims7
A sealing ring for sealing a pipe joint in an annular space between a socket end and a spigot end introduced therein, comprising:
- an annular sealing element;
- and
- a substantially annular reinforcing element, said sealing element being of an elastically yieldable sealing material and said reinforcing element being of a material which is rigid in relation to the elastically yieldable sealing material;
- said sealing element including a connection portion having an inner connection surface;
- said reinforcing element including an outer connection surface being fixedly connected with said inner connection surface;
- said connection surfaces forming a connection interface therebetween, said sealing element connection portion having an axially outer surface that is congruent with said outer connection surface of said reinforcing element and is axially displaced from said connection surface of said reinforcing element a distance equal to the axial thickness of said sealing element connection portion at said inner connection surface, whereby the axially outer surface of said sealing element connection portion and the outer connection surface of said reinforcing element can be injection moulded by means of a single mould cavity surface;
- said sealing element further including one of an inner and outer sealing portion connected to said connection portion and extending generally in a radial direction relative to said connection portion for sealing against a surface of a pipe joint.
Dependencies are inferred from the claim text.