Corporation cock fastening arrangement

Claim 1

A water service installation comprising, in combination, a. a corporation cock having a body portion and an externally threaded portion smaller in diameter than said body portion, said body portion having an annular abutment face surrounding said threaded portion, b. a thin walled water service pipe having a cylindrical wall with a threaded opening therein threadedly engaged by said threaded portion, said cylindrical wall being of a thickness corresponding to about two to three threads of said threaded portion, and c. a packing element surrounding said threaded portion and comprising annular packing means of highly elastic rubbery material sealingly compressed between and in frictional engagement with the cylindrical surface of said thin walled service pipe and the annular abutment surface of said corporation cock for both sealing the installation against leakage and resisting any tendency of said corporation cock to become accidentally detached from said thin-walled pipe, said packing element comprising a saddle and two annular rings of said elastic material, said saddle having a hole therein larger in diameter than the diameter of said threaded portion and through which said threaded portion loosely passes, said annular rubbery rings being compressed between said saddle and the cylindrical surface of said thin walled pipe, and between said saddle and said abutment surface, respectively, and said saddle being of a shape to extend over only a limited region of said pipe surrounding the threaded opening therein, said saddle having an annular groove in the surface thereof facing said abutment shoulder, said annular groove engaging and positioning the annular rubbery ring compressed against said abutment shoulder thereby.