# US 2020/0400062 A1 · Valve device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2020/0400062 A1
- Document ID: US20200400062A1
- Status: Published application
- Kind: A1
- Application number: 16/643,734
- Filed: 2018-09-25
- Published: 2020-12-24
- Earliest claimed: 2017-09-26
- Assignees: Yamada Manufacturing Co., Ltd.
- Applicants: Yamada Manufacturing Co., Ltd.
- Inventors: Akifumi OZEKI; Toshihito NAGAI
- Web page: https://patentgrep.com/patent/US20200400062A1

## CPC

- F01P 7/165: {characterised by systems with two or more loops}
- F16K 5/04: with plugs having cylindrical surfaces; Packings therefor
- F16K 5/045: {Particular coverings and materials}
- F01P 2007/146: {using valves}
- F01P 2060/04: Lubricant cooler
- F01P 2060/08: Cabin heater
- F01P 2060/16: Outlet manifold
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)
- 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 valve device includes: a casing having an outflow port in which a fluid outlet opening is formed; a joint joined to an opening end surface of the outlet opening; a valve accommodated in the casing so as to be rotatable or slidable and in which a communication port that can communicate with the outlet opening is formed; and a sliding ring with a sliding surface for sliding on an outer surface of the valve while being accommodated in the outflow port and communicates the outlet and the communication port based upon a position of the valve. At least the outer surface of the valve includes a first resin material that contains a first resin, at least the sliding surface of the sliding ring includes a second resin material that contains a second resin, and the first resin and the second resin are the same type of resin.

## Claims

### Claim 1

A valve device comprising:
a casing having an outflow port in which a fluid outlet opening in a first direction is formed;
a joint joined to an opening end surface of said outlet in said outflow port;
a valve accommodated in said casing so as to be rotatable or slidable and in which a communication port that can communicate with said outlet is formed; and
a sliding ring that has a sliding surface for sliding on an outer surface of said valve while being accommodated in said outflow port and communicates said outlet and said communication port in accordance with a rotating position or a sliding position of said valve,
wherein at least said outer surface of said valve comprises a first resin material that contains a first resin as a main component,
at least said sliding surface of said sliding ring comprises a second resin material that contains a second resin as a main component, and
said first resin and said second resin are the same type of resin.

### Claim 2 (depends on 1)

The valve device according to claim 1, further comprising a sealing ring interposed between an inner peripheral surface of said outflow port and an outer surface of said sliding ring;
wherein said sliding ring comprises:
a small diameter portion having said outer surface on which said sealing slides; and
a large diameter portion which is positioned on a side of said valve in aid first direction with respect to said small diameter portion and is increased in diameter with respect to said small diameter portion;
a surface of said large diameter portion facing said valve in said first direction constitutes said sliding surface,
a surface of said large diameter portion facing an opposite side of said valve in said first direction constitutes a facing surface that faces said sealing ring in said first direction, and
an area of said sliding surface is larger than an area of said facing surface.

### Claim 3 (depends on 1)

The valve device according to claim 1, wherein a sliding speed of said sliding surface with respect to said outer surface when said valve rotates or slides is 3 m/min or less.

### Claim 4 (depends on 3)

The valve device according to claim 3, wherein a surface pressure acting between said outer surface and said sliding surface when said valve rotates or slides is 1 MPa or less.

### Claim 5 (depends on 1)

The valve device according to claim 1, wherein a linear expansion coefficient of said second resin material from 40 to 250% with respect to a linear expansion coefficient of said first resin material.

### Claim 6 (depends on 1)

The valve device according to claim 1, wherein said first resin and said second resin are both polyphenylene sulfide, polyether ether ketone or polyamide.

### Claim 7 (depends on 1)

The valve device according to claim 1, wherein said first resin and said second resin are both polyphenylene sulfide.