초록 ▼

The invention relates to a method of sealing the space between two substantially coaxial sealing surfaces (24 and 30) which are insertable one in the other, preferably for sealing the space between a socket and a spigot end of a pipe joint. Before the sealing surfaces are inserted one into the other

The invention relates to a method of sealing the space between two substantially coaxial sealing surfaces (24 and 30) which are insertable one in the other, preferably for sealing the space between a socket and a spigot end of a pipe joint. Before the sealing surfaces are inserted one into the other a sealing ring (2) is positioned in connection with one of the sealing surfaces, the sealing ring being thereby enclosed in or being thereby enclosed into a covering (12), which contains a lubricant (18). The insertion of the sealing surfaces one in the other is facilitated either by the fact that the covering (12) is broken so that the lubricant is made accessible at surfaces of the joint sliding against each other and/or by the fact that a portion of the covering slides between the sealing ring and the sealing surface or the sealing surfaces.

대표청구항 ▼

In a sealed and lubricated coaxial pipe joint formed by connecting an outer socket and an inner spigot with an annular elastic seal between them, the improvement comprising: an annular sliding sealing ring adapted to be mounted within the joint prior to the connection thereof, and consisting essenti

In a sealed and lubricated coaxial pipe joint formed by connecting an outer socket and an inner spigot with an annular elastic seal between them, the improvement comprising: an annular sliding sealing ring adapted to be mounted within the joint prior to the connection thereof, and consisting essentially of: (a) an annular elastic core having a radially projecting engagement portion, (b) an annular tearable covering toroidally surrounding said core, and (c) a lubricant annularly positioned between at least a portion of said core and said covering, means for mounting said sealing ring within the joint prior to connection thereof, said means being integral with said socket or spigot, and stop means for preventing insertion beyond a predetermined point, so that insertion of the spigot into the socket will cause the covering of the sealing ring to be engaged and torn at the point of said radially projecting portion, releasing the lubricant to facilitate said insertion and permitting the elastic core to form a seal.