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Title:
PIPE JOINT, PACKING RING, AND METHOD FOR MOUNTING PIPE JOINT
Document Type and Number:
WIPO Patent Application WO/2011/155082
Kind Code:
A1
Abstract:
A pipe joint (10) is provided with: pressing rings (4) fitted over pipes to be joined; a pipe joint body (2) having containing sections (20) expanded in diameter toward the pressing rings (4); tightening elements (3) capable of operating and moving the pressing rings (4) toward the pipe joint body (2); and packing rings (5) compressed by being pressed by the pressing rings (4) which are moved by the operation of the tightening elements (3). The packing rings (5) each have a base section (51) fitted and mounted in the containing section (20) at the rear thereof; a seal section (52) contained within the containing section (20) at the front thereof; and a connection section (53) for connecting the base section (51) and the seal section (52) and having a cutout groove (54) formed on the outer peripheral side thereof. When the packing ring (5) which is positioned by fitting and mounting the base section (51) in the containing section (20) at the rear thereof is subjected to pressing by the pressing ring (4), the seal section (52) is bent into the cutout groove (54) and deformed, and the compression caused by the deformation creates a sealed state.

Inventors:
MAENISHI TAMOTSU (JP)
NAGAMORI YASUYUKI (JP)
TANIWAKI KOJI (JP)
Application Number:
PCT/JP2010/065125
Publication Date:
December 15, 2011
Filing Date:
September 03, 2010
Export Citation:
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Assignee:
WATERWORKS TECHNOLOGY DEV ORG (JP)
MAENISHI TAMOTSU (JP)
NAGAMORI YASUYUKI (JP)
TANIWAKI KOJI (JP)
International Classes:
F16L21/04; F16L21/08
Foreign References:
JP4144675B22008-09-03
JPH06241359A1994-08-30
JP2008082494A2008-04-10
JP4200558B22008-12-24
JP3897433B22007-03-22
JP4144675B22008-09-03
JP4200558B22008-12-24
JP3897433B22007-03-22
Other References:
See also references of EP 2581636A4
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Patent business corporation ユニアス international patent firm (JP)
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Claims: