Pressure reduction valve and gas supply device

Patent metadata

Field	Value
Publication number	US-9897219-B2
Application number	US-201514926995-A
Country	US
Kind code	B2
Filing date	Oct 29, 2015
Priority date	Nov 13, 2014
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

The pressure reduction valve includes: a cylindrical portion, a piston and a spring. The cylindrical portion includes an inlet communicating with the primary side flow path and an outlet communicating with the secondary side flow path. The piston fitted into the cylindrical portion is slidable along an axis direction of the cylindrical portion within the cylindrical portion, and defines, within the cylindrical portion, a space communicating with the inlet and the outlet. The spring applies, to the piston, a force acting toward the space. The outlet is displaced in one direction from the center of the piston when seen in the axis direction. The force applied to the piston by the spring is distributed so as to deviate from the center of the piston to the side of the outlet.

First claim

What is claimed is:

1. A pressure reduction valve reducing pressure of a gas supplied from a primary side flow path to a secondary side flow path, the pressure reduction valve comprising:
a cylindrical portion that includes an inlet communicating with the primary side flow path and an outlet communicating with the secondary side flow path;
a piston fitted into the cylindrical portion without being attached to the cylindrical portion, the piston being slidable along an axis direction of the cylindrical portion within the cylindrical portion and being configured to be inclined relative to the cylindrical portion toward the outlet so as to increase the sliding resistance of the piston within the cylindrical portion, the piston defining, within the cylindrical portion, a space communicating with the inlet and the outlet; and
a spring that applies, to the piston, a force acting toward the space,
wherein the outlet is displaced in one direction from the center of the piston when seen in the axis direction, and a net force applied to the piston by the spring is distributed so as to deviate from the center of the piston to the side of the outlet and cause a moment to be applied to the piston.

2. The pressure reduction valve according to claim 1 , wherein a part of the spring in contact with the piston is distributed so as to deviate from the center of the piston to the side of the outlet.

3. The pressure reduction valve according to claim 1 , wherein a part of the spring in contact with the piston overlaps at least part of the outlet.

4. The pressure reduction valve according to claim 1 , wherein the spring is a coil spring, and the outlet is located at an angle of 90° from an end portion of the spring in contact with the piston toward a direction of winding of the spring with respect to the center of the piston when seen in the axis direction.

5. A gas supply device comprising:
a pressure reduction valve according to claim 1 ; and
an injection portion that is connected to the secondary side flow path and injects a gas within the secondary side flow path.

6. The reduction valve according to claim 1 , wherein the moment applied to the piston moves the piston in an inclined manner with respect to the axis direction.

Assignees

• Toyota Motor Co Ltd
• Jtekt Corp

Inventors

• Saito Norihiko
• Goto Sogo
• Kondo Masaaki
• Yamashita Akira
• Okawachi Eiji
• Kuroyanagi Munetoshi
• Kubo Toshikatsu
• Iwaguchi Takashi

Classifications

• G05D16/10

  the sensing element being a piston or plunger · CPC title

• F16K1/32

  Details (details of more general applicability F16K25/00 - F16K51/00) · CPC title

• F16K17/04 Primary

  spring-loaded · CPC title

• F16K17/06

  with special arrangements for adjusting the opening pressure · CPC title

• F16K17/044 Primary

  with more than one spring · CPC title