Method of manufacturing thermo valve and thermo valve

Patent metadata

Field	Value
Publication number	US-10837560-B2
Application number	US-201816192886-A
Country	US
Kind code	B2
Filing date	Nov 16, 2018
Priority date	Nov 28, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A method of manufacturing a thermo valve includes an overlaying step of overlaying a valve body onto a thermo actuator so as to cover a groove portion; and a caulking step of caulking an installing portion of the valve body onto the thermo actuator. The caulking step is performed by pressing, by use of a jig, the valve body and the thermo actuator toward an axis center in a radial direction. A pressing face of the jig has a short side portion and a long side portion longer than the short side portion. Pressing is performed with the long side portion being substantially in parallel to the axis center of the thermo actuator and the short side portion being substantially in parallel to the groove portion.

First claim

What is claimed is:

1. A thermo valve comprising:
a thermo actuator having a proximal end and a distal end, wherein a rod extends from said proximal end and is actuated in accordance with change in temperature of fluid;
a valve body fastened to the thermo actuator at a fastening portion and configured to control flow rate of the fluid, said valve body extending axially from the distal end of said thermo actuator; and
a case that receives said thermo actuator and said valve body, said case having openings in a circumferential surface thereof that are opened or blocked by said valve body based upon fluid temperature;
a returning spring configured to bias the thermo actuator and the valve body in a returning direction that is generally parallel to an axis center of said case,
one of the thermo actuator and the valve body having a groove portion formed in a circumferential direction thereof,
the thermo actuator and the valve body being overlaid onto each other along the axis center so as to cover the groove portion,
the fastening portion being provided at least where the thermo actuator and the valve body are overlaid onto each other, and wherein, at the fastening portion, at least one of the valve body and the thermo actuator is deformed and part of the thermo actuator or the valve body extends into the groove portion, and
the fastening portion has a vertically long shape along the axis center.

2. The thermo valve according to claim 1 , wherein
the thermo actuator has an actuator body configured to support the rod in a manner capable of moving forward and retreating, and
the valve body being fastened to the actuator body.

Assignees

• Yamada Mfg Co Ltd

Inventors

• Shoji Kazuo
• Miyajima Junichi
• Yoshino Soichi

Classifications

• G05D23/022 Primary

  the sensing element being placed within a regulating fluid flow · CPC title

• F16K31/002 Primary

  actuated by temperature variation (thermo-electric F16K31/025) · CPC title

• F16K11/0716

  with fluid passages through the valve member (F16K11/0704, F16K11/0708, F16K11/0712 take precedence) · CPC title

• F16K1/54 Primary

  Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve · CPC title

• F03G7/06113

  the fluids subjected to phase change · CPC title