초록 ▼

A fluid control valve, which can control a fluid having a pressure in the order of 10 kg/cm.sup.2, has a response time in the order of several milliseconds can be made small in size, and a fluid supply/exhaust system that provides less gas counter flow in the event of a plurality of valves being use

A fluid control valve, which can control a fluid having a pressure in the order of 10 kg/cm.sup.2, has a response time in the order of several milliseconds can be made small in size, and a fluid supply/exhaust system that provides less gas counter flow in the event of a plurality of valves being used. A fluid control valve of the invention controls a fluid moving in a valve body by closing and opening a portion between a valve seat and a valve holder by use of a drive unit. The drive unit has a rod-shaped shaft for application of pressure through the valve seat and the valve holder, and a member "a" fixed around the rod-shaped shaft. The member "a" is made from a magnetic material, and has a space between it and the shaft. A coil provided in parallel to the shaft, moves the shaft via the member "a" up and down by electromagnetic induction, and makes use of a spring force to close and open a portion between the valve seat and the valve holder.

대표청구항 ▼

[What is claimed is:] [1.]a drive unit having a valve rod, a rod shaped shaft for applying pressure to said valve seat via said valve rod, and a member "a" which is affixed around said rod shaped shaft;said member "a" formed of a magnetic material;a coil having a space between it and said shaft, sai

[What is claimed is:] [1.]a drive unit having a valve rod, a rod shaped shaft for applying pressure to said valve seat via said valve rod, and a member "a" which is affixed around said rod shaped shaft;said member "a" formed of a magnetic material;a coil having a space between it and said shaft, said member "a" provided at a position parallel to said shaft moving upwardly and downwardly by electromagnetic induction;a spring, whereby the portion between the valve seat and the valve holder is opened and closed; anda member "b" comprises a magnetic material identical to that of said member "a" and is provided in said gap between said shaft and said coil.