# US 10,767,547 B2 · Thermostat device

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- Number: US 10,767,547 B2
- Document ID: US10767547B2
- Status: Granted
- Kind: B2
- Application number: 16/097,619
- Filed: 2017-02-22
- Published: 2019-05-23
- Granted: 2020-09-08
- Earliest claimed: 2016-06-07
- Assignees: Nippon Thermostat Co., Ltd.
- Applicants: Nippon Thermostat Co., Ltd.
- Inventors: Fujio Inoue; Tetsuya Nishimura
- Web page: https://patentgrep.com/patent/US10767547B2

## CPC

- F01P 7/165: {characterised by systems with two or more loops}
- G05D 23/022: {the sensing element being placed within a regulating fluid flow}
- G05D 23/1852: {with sensing element expanding and contracting in response to change of temperature}
- F01P 7/16: by thermostatic control
- 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)
- G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES

## Abstract

A thermostat device provided with a cylindrical boss protruding into a flow of fluid flowing in from a fluid inlet inside a device housing from a direction obstructing the flow of fluid, wherein a rectifying wall in the shape of a thin plate that protrudes toward an upstream side of the flow of fluid from the boss is provided as a rectifying means. The rectifying wall is formed in the shape of a plate that gradually increases in thickness from the fluid inlet side toward the boss. The leading edge along a direction of the flow of fluid is formed to have a tapered shape inclined from the tip of the boss toward the base of the boss. A side of the boss opposite the side facing the fluid inlet is provided with a rib.

## Claims

### Claim 1

A thermostat device comprising:
a thermostat device housing having a fluid inlet therein;
a cylindrical boss disposed inside the thermostat device housing and protruding vertically downward into an interior of the thermostat device housing and into a flow of fluid flowing in from the fluid inlet; and
a rectifying wall provided to a portion of an outer peripheral surface of the cylindrical boss that faces the fluid inlet,
wherein the rectifying wall is a thin plate that protrudes toward the fluid inlet and upstream into the flow of fluid, and has a leading edge along a direction of the flow of fluid formed to have a tapered shape inclined from a tip of the boss toward a base of the boss.

### Claim 2 (depends on 1)

The thermostat device according to claim 1, wherein the rectifying wall gradually increases in thickness from the fluid inlet side toward the boss.

### Claim 3 (depends on 1)

The thermostat device according to claim 1, wherein a rib is provided to a side of the boss opposite the side facing the fluid inlet, at a position axisymmetric with respect to the rectifying wall.