Piping joint and resin tube assembly

Patent metadata

Field	Value
Publication number	US-11262006-B2
Application number	US-201816487805-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Feb 23, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A piping joint connects a resin tube to a connection pipe having a protrusion formed on an outer peripheral surface of a distal end portion of the connection pipe. The piping joint includes a housing press-fitted into the resin tube and an elastically extendable and contractible seal member into which the connection pipe is inserted such that sealing is performed between the connection pipe and the seal member. The housing has a first housing portion positioned in one end portion and having an outer peripheral surface side press-fitted into the resin tube and a second housing portion positioned in the other end portion. The seal member has a first seal portion inserted on an inner peripheral surface side of the second housing portion.

First claim

The invention claimed is:

1. A piping joint connecting a resin tube to a connection pipe having a protrusion formed on an outer peripheral surface of a distal end portion of the connection pipe, the piping joint comprising:
a housing press-fitted into the resin tube;
an elastically extendible and contractible seal member into which the connection pipe is inserted such that sealing is performed between the connection pipe and the seal member; and
a seal band tightening the seal member, wherein
the housing has a first housing portion positioned in one end portion and having an outer peripheral surface side press-fitted into the resin tube and a second housing portion positioned in the other end portion, and
the seal member has a first seal portion inserted on an inner peripheral surface side of the second housing portion and a second seal portion protruding from the housing and tightened to the seal band.

2. The piping joint according to claim 1 , wherein
a recess is formed in either an inner peripheral surface of the second housing portion or an outer peripheral surface of the first seal portion, and
a protrusion fitted into the recess is formed on the other of the inner peripheral surface of the second housing portion and the outer peripheral surface of the first seal portion.

3. The piping joint according to claim 1 , wherein the housing and the seal member are integrally molded.

4. The piping joint according to claim 1 , wherein the housing and the seal member are separate members.

5. A resin tube assembly comprising:
a resin tube,
a connection pipe having a protrusion formed on an outer peripheral surface of a distal end portion of the connection pipe; and
a piping joint connecting the resin tube to the connection pipe, the piping joint comprising:
a housing press-fitted into the resin tube;
an elastically extendible and contractable seal member into which the connection pipe is inserted such that sealing is performed between the connection pipe and the seal member; and
a seal band tightening the seal member; wherein
the housing has a first housing portion positioned in one end portion and having an outer peripheral surface side press-fitted into the resin tube and a second housing portion positioned in the other end portion, and
the seal member has a first seal portion inserted on an inner peripheral surface side of the second housing portion and a second seal portion protruding from the housing and tightened to the seal band.

Assignees

• Sanoh Ind Co Ltd

Inventors

• Oba Fuminori
• KAMAZUKA Ukyo
• Shen Junjie
• Yamaguchi Masashi

Classifications

• F16L21/02 Primary

  with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00) · CPC title

• F16L37/084

  combined with automatic locking · CPC title

• F16L33/30 Primary

  comprising parts inside the hoses only (F16L33/24 takes precedence) · CPC title

• F16L17/02

  with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket · CPC title

• F16L2201/10

  Indicators for correct coupling · CPC title