Vacuum regulating valve

Details Vacuum regulating valve Vacuum regulating valve

Filed on

2006-10-10

Date issued

2006-10-10

Examiner

Krishnamurthy, Ramesh (Department: 3753)

Patent Class

Fluid handling

SubClass

Line condition change responsive valves

SubSubClass

Pilot or servo controlled

Other Related Categories

C137S554000, C251S063500, C251S285000

Type

Reexamination Certificate

Status

active

Patent number

07117886

Description

ABSTRACT:
A vacuum regulating valve has high controllability, wherein the opening of a valving member can be quickly and accurately controlled by using a small and inexpensive electric motor. In accordance with a signal indicative of a pressure set value and a pressure signal from the pressure sensor, the main controller in the valve control section outputs a signal for setting the opening of the valving member to a motor controller that controls the electric motor, and performs control to cause a pilot fluid to be supplied to a pressure receiving chamber of the piston, thereby causing the piston to move to the position of abutment with the stopper.

REFERENCES:
patent: 6581635 (2003-06-01), Furutate et al.
patent: 08-178126 (1996-07-01), None
patent: 2003156171 (2003-05-01), None
patent: 2005-76829 (2005-03-01), None

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