Separation preventing device of fluid pipe, and pipe joint

Patent metadata

Field	Value
Publication number	US-9964244-B2
Application number	US-201514642478-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Mar 10, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A separation preventing device that prevents separation of a fluid pipe in a pipe axis direction, includes a main body externally fitted to an outer peripheral surface of the fluid pipe and has a recess portion facing the outer peripheral surface; a locking member housed in the recess portion in a tiltable manner and is able to bite into the outer peripheral surface of the fluid pipe; and pressing units that are provided in the main body and press the locking member, wherein the locking member has a plurality of wedge portions in a front-back direction of a pipe axis of the fluid pipe, and is equipped with a projection portion that regulates biting of a front wedge portion of the plurality of wedge portions into the fluid pipe, when the fluid pipe moves to a separation side in the pipe axis direction.

First claim

What is claimed is:

1. A separation preventing device of a fluid pipe that prevents separation of the fluid pipe in a pipe axis direction, the separation preventing device comprising:
a main body member that is externally fitted to an outer peripheral surface of the fluid pipe and has a recess portion facing the outer peripheral surface;
a locking member that is housed in the recess portion in a tiltable manner and is able to bite into the outer peripheral surface of the fluid pipe; and
a pressing unit that is provided in the main body member and presses the locking member,
the locking member has a plurality of wedge portions in a front-back direction of a pipe axis of the fluid pipe, and an auxiliary wedge projection portion that regulates biting of a front wedge portion of the plurality of wedge portions into the fluid pipe, when the fluid pipe moves to a separation side in the pipe axis direction,
wherein the projection portion is provided between a front wedge portion and a rear wedge portion of the plurality of wedge portions.

2. The separation preventing device of a fluid pipe according to claim 1 , wherein the projection portion is a wedge portion that bites into the fluid pipe at least by tilting.

3. The separation preventing device of a fluid pipe according to claim 1 , wherein a leading end of the projection portion does not project from a line that connects a leading end of the front wedge portion and a leading end of the rear wedge portion.

4. The separation preventing device of a fluid pipe according to claim 1 , wherein the wedge portions tilt to a front side in the pipe axis direction of the fluid pipe.

5. A pipe joint comprising:
the fluid pipe;
a pipe socket into which a front end portion of the fluid pipe is inserted; and
the separation preventing device of the fluid pipe that prevents separation of the fluid pipe from the pipe socket according to claim 1 .

Assignees

• Cosmo Koki Co Ltd
• Kubota Kk

Inventors

• Maeda Yoshinori
• Sato Atsushi
• Ogata Toshihiko

Classifications

• F16L23/02 Primary

  the flanges being connected by members tensioned axially (F16L23/12 takes precedence) · CPC title

• F16L23/024 Primary

  characterised by how the flanges are joined to, or form an extension of, the pipes · CPC title

• F16L23/003

  Auxiliary devices · CPC title

• F16L21/08 Primary

  with additional locking means (F16L21/06 takes precedence; couplings of the quick-acting type F16L37/00) · CPC title