Pipe joint

Details Pipe joint Pipe joint

2005-11-18

2008-11-25

Hewitt, James M (Department: 3679)

Pipe joints or couplings

Frangible element

C285S081000, C285S091000, C285S242000, C285S244000, C285S259000

Reexamination Certificate

active

07455324

ABSTRACT:
A pipe joint provided with a joint main body having an insertion cylinder portion inserted to an end portion of a pipe to be connected, a clamp ring having a slit to fasten the end portion of the pipe inserted to the insertion cylinder portion by elastic fastening force, a diameter-expansion piece, releasable as to jump outward, held within the slit to expand the clamp ring against elastic force of the clamp ring, and a restriction sleeve covering the clamp ring as to restrict the outward jump of the diameter-expansion piece. And, a pipe-insertion detector, detecting the insertion of the pipe to a predetermined depth to release the restriction, is provided.

REFERENCES:
patent: 4226445 (1980-10-01), Kramer
patent: 4278279 (1981-07-01), Zimmerman
patent: 4635966 (1987-01-01), Hermann
patent: 5022687 (1991-06-01), Ariga
patent: 5074600 (1991-12-01), Weinhold
patent: 5390963 (1995-02-01), Namekawa
patent: 6231084 (2001-05-01), Hester et al.
patent: 2002/0185861 (2002-12-01), Inoue et al.
patent: 2002-31282 (2002-01-01), None

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