Composite valve

Patent metadata

Field	Value
Publication number	US-9109716-B2
Application number	US-201213711777-A
Country	US
Kind code	B2
Filing date	Dec 12, 2012
Priority date	Dec 15, 2011
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

A composite valve has a communication path, a second valve port and a pilot passage. First and second valve bodies are arranged to be moved up and down in the same direction, and are away from each other only at a predetermined distance. In the case that a lift amount of the second valve body for a small flow rate control is equal to or less than a predetermined amount, said pilot passage and a first valve port are respectively closed by a pilot valve body and the first valve body, thereby taking a small flow rate control state. In the case that the lift amount of said second valve body goes beyond said predetermined amount, said pilot valve body is moved up by the upward movement of a valve shaft to open said pilot passage, thereby taking a large flow rate control state.

First claim

What is claimed is:

1. A composite valve comprising:
a first valve body;
a valve shaft which is provided with a second valve body;
an elevation driving means for moving up and down said valve shaft;
a pilot valve body which is driven so as to be opened and closed by utilizing an elevating motion of said valve shaft; and
a valve main body which is provided with an inflow port and an outflow port,
wherein between said inflow port and said outflow port in said valve main bo…

Assignees

• Fujikoki Corp

Inventors

• Arai Yusuke

Classifications

• F16K31/12 Primary

  Mechanical Engineering · mapped topic

• F16K31/04

  Mechanical Engineering · mapped topic

• Y10T137/7758

  Cross-Sectional Technologies · mapped topic

• F25B41/062

  Mechanical Engineering · mapped topic

• F16K31/406

  Mechanical Engineering · mapped topic