# US 8,770,547 B2 · Fluid control valve

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- Number: US 8,770,547 B2
- Document ID: US8770547B2
- Status: Granted
- Kind: B2
- Application number: 13/353,871
- Filed: 2012-01-19
- Published: 2012-08-02
- Granted: 2014-07-08
- Earliest claimed: 2011-01-31
- Assignees: Ckd Corporation
- Applicants: Mitsuhiro Takeuchi; Michio Miyashita
- Inventors: Mitsuhiro Takeuchi; Michio Miyashita
- Web page: https://patentgrep.com/patent/US8770547B2

## CPC

- F16K 27/0236: {Diaphragm cut-off apparatus}
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}

## Abstract

A fluid control valve includes a resin valve body formed with first and second passages, a resin valve upper part connected to an upper surface of the valve body, and a resin diaphragm valve element held between the valve body and the valve upper part.

## Claims

### Claim 1

A fluid control valve comprising:
a resin valve body formed with a first passage and a second passage that are communicated with each other through a valve chamber;
a resin valve upper part connected to an upper surface of the valve body; and
a resin diaphragm valve element held between the valve body and the valve upper part,
wherein
the valve body is internally formed with a valve hole located in a bottom of the valve chamber and in which the first passage opens,
the valve body has a valve seat around the valve hole, with which the resin diaphragm valve element comes into or out of contact,
the first passage includes (1) a port communication passage of a cylindrical shape having one end communicating with a port provided in the valve body and (2) a valve-hole communication passage of a cylindrical shape having one end communicating with the valve hole, the port communication passage and the valve-hole communication passage being communicated with each other at a predetermined angle,
a connecting part between the port communication passage and the valve-hole communication passage is internally formed with a curved surface having a tapered shape, and
the second communication passage is in uneven parallel to the port communication passage and has one end in communication with a second port and an other end opening in a side wall of the valve chamber.

### Claim 2 (depends on 1)

The fluid control valve according to claim 1, wherein the tapered curved surface is formed by a cutting tool that takes a conical rotation track.

### Claim 3 (depends on 1)

The fluid control valve according to claim 1, wherein the predetermined angle is a right angle.

### Claim 4 (depends on 1)

The fluid control valve according to claim 1, wherein an other end of the port communication passage and an other end of the valve-hole communication passage are directly connected.

### Claim 5 (depends on 1)

The fluid control valve according to claim 1, wherein the first passage, including the port communication passage and the valve-hole communication passage, and the second passage are coplanar.

### Claim 6 (depends on 1)

The fluid control valve according to claim 1, wherein a same axis of the second passage intersects both the one end and the other end of the second passage.