Metal packing ring for use with screwed pipe joints or couplings
    9.
    发明授权
    Metal packing ring for use with screwed pipe joints or couplings 失效
    用于螺纹管接头或联轴器的金属填料环

    公开(公告)号:US2171217A

    公开(公告)日:1939-08-29

    申请号:US15944837

    申请日:1937-08-17

    Applicant: HANS KREIDEL

    Inventor: HANS KREIDEL

    CPC classification number: F16L19/10 Y10S285/916

    Abstract: 491,761. Pipe joints. PATEX SOC. ANON. Nov. 11, 1937, No. 31035. Convention date, Nov. 11, 1936. [Class 99 (i)] In a spigot and socket joint, the jointing ring 10 is made of steel of low carbon content and is surface hardened so that the ring remains deformable but its edge is hard enough to cut into the pipe 7. The ring may be coated with cadmium. Specification 433,656 is referred to.

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