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US 5,181,730 AGranted
Sealing system for abutting tube ends in a pipe conduit
AssigneeFriele Trading A/S
InventorOle G. Hjertholm
Life of this patent
Estimating the term…
Abstract
The sealing system employs a metal sealing ring having tapered surfaces which are able to slide along tapered sealing surfaces of the pipe forming members in the event of an axial movement of the pipe forming members away from each other, for example under a back fire situation. The metal sealing ring maintains effective sealing pressure and the sealing surfaces of the pipe forming members define an angle therebetween of from 30.degree. to 50.degree.. The sealing ring is made of highly elastic rust-free steel and is of wedge shape.
Claims20
In combination
- a pair of pipe-forming members disposed in axial relation, each of said members having an inner surface coextensive with an inner surface of the other of said members, a tapered sealing surface facing said tapered sealing surface of the other of said members, and a support surface abutting said support surface of the other of said members;
- and
- a metal sealing ring disposed in sealing relation between said members, said sealing ring having an inner annular surface coextensive with said inner surfaces of said members, a pair of tapered sealing surfaces in sealing contact with said respective sealing surfaces of said members and an outer annular surface spaced radially inwardly of said abutting support surfaces whereby upon axial movement of said members away from each other, said sealing surfaces of said ring slide along said sealing surfaces of said members while maintaining sealing contact therebetween throughout the radial width of said ring.
A coupling connection for a pipe conduit comprising
- a pair of pipe-forming members, each member having a support surface abutting said support surface of the other of said members and a tapered sealing surface facing said tapered sealing surface of the other of said members;
- a plurality of locking means disposed about said members for releasably locking said members together while imposing a predetermined pressure force on said abutting support surfaces;
- and
- a metal sealing ring disposed in sealing relation between said sealing surfaces of said members, said sealing ring having a pair of tapered sealing surfaces in sealing contact with said respective sealing surfaces of said members, whereby upon axial movement of said members away from each other, said sealing surfaces of said ring slide along said sealing surfaces of said members while maintaining sealing contact therebetween throughout the radial width of said ring.
1 more element
In combination
- a pair of pipe-forming members disposed in axial relation, each of said members having an inner surface coextensive with an inner surface of the other of said members, a tapered sealing surface facing said tapered sealing surface of the other of said members, and a support surface abutting said support surface of the other of said members;
- and
- a metal sealing ring disposed in sealing relation between said members, said sealing ring having an inner annular surface coextensive with said inner surfaces of said members, a pair of tapered sealing surfaces in sealing contact with said respective sealing surfaces of said members, said ring having an annular cavity at said inner annular surface to receive said stop therein, and an outer annular surface to receive said stop therein, and an outer annular surface spaced radially inwardly of said abutting support surfaces whereby upon axial movement of said members away from each other, said sealing surfaces of said ring slide along said sealing surfaces of said members while maintaining continuous sealing contact therebetween throughout the entire extend of said sealing surfaces.
Dependencies are inferred from the claim text.