Main valve

Details Main valve Main valve

1995-05-16

1996-10-01

Nguyen, Hoang

Valves and valve actuation

Pivoted valves

251266, 2513353, 25112911, F16K 116, F16K 3102

Patent

active

055605869

ABSTRACT:
A bridge-type main valve located at a connecting outlet between a vacuum chamber and a main vacuum pump, and having a rod of an electric cylinder driven by a stepper motor connected to a valve seat for opening and dosing the connecting outlet so that the driving direction and a closing surface of the valve seat form a right angle. A piston may be attached to the rod, and a cylindrical housing fitted in the piston so that the piston and the cylindrical housing form a pressurized air pumping chamber for moving the rod and the valve seat in the outlet closing direction. The valve can achieve fine pressure adjustment without any variable orifice by stopping a valve seat at an arbitrary (not stepwise) position.

REFERENCES:
patent: 2767923 (1956-10-01), Matthews
patent: 3774462 (1973-11-01), Thompson
patent: 4993474 (1985-01-01), Ohyama
patent: 5226632 (1993-07-01), Tepman et al.
patent: 5318272 (1994-06-01), Smith
patent: 5363872 (1994-11-01), Lorimer

Affiliated with

Also associated with

Rating

Main valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Main valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Main valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1498517