Self-lubricating sealing ring

A sealing ring for fitting between and sealing an annular space between connecting concentric pipe joint members which are slid into each other to form a pipe joint, said sealing ring comprising:

• an annular main body having substantially triangular shape having a vertex and a base, said base engaging one of the pipe joint members, and said body having an inclined surface between said vertex and said base defining a corner with said base, for engaging the other pipe joint member during the formation of the pipe joint;
• a thin rupturable membrane of a thickness less than 0.008 inches attached to said inclined surface proximate said vertex and proximate said corner about the circumference of the annular main body, said rupturable membrane forming an encapsulated cavity;
• a lubricant disposed in the encapsulated cavity within said membrane whereby when said pipe joint members are slid into each other to form a pipe joint said rupturable membrane is ruptured and said lubricant is released.

A sealing ring for fitting between and sealing an annular space between connecting pipe joint members which are axially slid into each other to form a pipe joint, said seating ring comprising:

• an annular main body having a substantially triangular shape having a vertex and a base, said base engaging one of the pipe joint members, and said body having an inclined surface between said vertex and said base defining a corner with said base, for engaging the other pipe joint member during the formation of the pipe joint;
• a thin rupturable membrane of a thickness of 0.004 inches to 0.008 inches attached to said inclined surface proximate said vertex and proximate said corner about the circumference of the annular main body defining an annular cavity, said cavity defined between said membrane and said inclined surface;
• a lubricant disposed in said cavity about the circumference of the annular main body whereby when said pipe joint members are slid into each other to form a pipe joint said rupturable membrane is ruptured and said lubricant is released.

A sealing ring for fitting between and sealing an annular space between connecting concentric pipe joint members which are slid into each other to form a pipe joint, said sealing ring comprising:

• an annular main body having a substantially triangular shape having a vertex and a base, said base engaging one of the pipe joint members and, said body having an inclined surface between said vertex and said base defining a corner with said base, for engaging the other pipe joint member during the formation of the pipe joint;
• a thin rupturable membrane of a thickness of 0.004 inches to 0.008 inches attached to said inclined surface proximate said vertex and proximate said corner about the circumference of the annular main body, said rupturable membrane forming an encapsulated cavity;
• a lubricant disposed in the encapsulated cavity within said membrane whereby when said pipe joint members are slid into each other to form a pipe joint said rupturable membrane is ruptured and said lubricant is released.