Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1976-10-14
1978-01-17
Callaghan, Thomas F.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
285179, 285356, 285415, F16L 1900
Patent
active
040688631
ABSTRACT:
A mechanical pipe joint comprising a length of metal pipe having an annular groove at one end, in which there is loosely received an annular compression ring. A companion pipe fitting part is provided, which telescopically receives the metal pipe. Disposed between the latter and the pipe fitting part is an axially compressible, radially expansible packing ring. One end of the packing ring seats against an internal shoulder on the companion pipe fitting part, with the other end of the packing ring being engageable with the compression ring. The pipe fitting part has internal screw threads, and a hollow nut having external screw threads is received in the bore of the fitting part, with the inner end of the nut being engageable with the compression ring. A second shoulder is provided in the bore of the pipe fitting part, constituting a seat for the end of the metal pipe. The arrangement is such that tightening of the nut first causes axial compression and radial expansion of the packing ring, and thereafter effects bottoming of the end of the metal pipe on the second shoulder in the bore of the pipe fitting part when a desired, predetermined amount of compression of the packing ring has occurred.
REFERENCES:
patent: 1853411 (1932-04-01), Gentry et al.
patent: 2441344 (1948-05-01), Bosworth
patent: 2628111 (1953-02-01), Smalline
patent: 2644700 (1953-07-01), Woodling
patent: 3552781 (1971-01-01), Helland
patent: 3558163 (1971-01-01), Moore et al.
patent: 3700268 (1972-10-01), Nielsen, Jr.
patent: 3733093 (1973-05-01), Seiler
patent: 3871691 (1975-03-01), Takagi et al.
Callaghan Thomas F.
Lehmann H. Gibner
Lehmann K. Gibner
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