Valve, fluidic apparatus, and fluid-supplying apparatus

Patent metadata

Field	Value
Publication number	US-9574674-B2
Application number	US-201514701852-A
Country	US
Kind code	B2
Filing date	May 1, 2015
Priority date	May 25, 2009
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A valve includes a valve body, a diaphragm dividing the inside of the valve body into first and second valve chambers and being displaced under a pressure of fluid, first and second openings in communication with the first valve chamber, and a third opening in communication with the second valve chamber. When a pump is not driven, the force applied to a side of the diaphragm facing the second valve chamber is greater than the force applied to a side of the diaphragm facing the first valve chamber, and the second opening is sealed by the diaphragm. When the pump is driven and the force applied to the side of the diaphragm facing the first valve chamber becomes greater than the force applied to the side of the diaphragm facing the second valve chamber, the diaphragm allows the first and second openings and to communicate with each other.

First claim

What is claimed is:

1. A valve comprising:
a valve body defined by a stack including a lower body including a first valve chamber, a diaphragm, and an upper body including a second valve chamber;
a first opening provided in the valve body at a location below the diaphragm from which fluid flows in;
a second opening provided in the valve body at a location below the diaphragm from which the fluid flows out; and
a third opening provided in the valve body at a location below and extending through the diaphragm; wherein
the second valve chamber and an outside of the second valve chamber directly communicate with each other via the third opening;
at least one of the first opening and the second opening is closed by the diaphragm; and
when a force applied by the fluid through the first opening to a front surface of the diaphragm differs from a force applied by the fluid through the third opening to a back surface of the diaphragm, the diaphragm is displaced and allows the first opening and the second opening to communicate with each other.

2. The valve according to claim 1 , wherein an area of a portion of the diaphragm that is in contact with the fluid in the second valve chamber is greater than an area of a portion of the diaphragm that is in contact with the fluid in the first valve chamber.

3. The valve according to claim 1 , wherein the first opening is connected to a differential-pressure-producing member.

4. The valve according to claim 3 , wherein at least one of the first opening and the second opening is provided with a seal member, and the seal member and the diaphragm are in contact with each other when the differential-pressure-producing member is not driven.

5. The valve according to claim 4 , wherein the seal member has a ring-like shape and is in line contact with the diaphragm.

Assignees

• Murata Manufacturing Co

Inventors

• Maeda Takenobu
• Kamitani Gaku
• Sasai Hidekazu

Classifications

• F16K15/185 Primary

  Mechanical Engineering · mapped topic

• F16K15/141

  the closure elements not being fixed to the valve body · CPC title

• G05D16/0633

  characterised by the properties of the membrane · CPC title

• F16K7/17 Primary

  the diaphragm being actuated by fluid pressure · CPC title

• F16K15/144

  the closure elements being fixed along all or a part of their periphery · CPC title