Patent ID: 6113071
Filing Date: 2000-09-05
Classification: F16K

Abstract:
An gas flow restriction device, comprising:a valve housing having an open first end, an open second end and an open central passage extending from said first end to said second end, said open central passage including an internally tapered section proximate said first end and an internally threaded section proximate said second end, wherein said internally tapered section tapers from a first diameter to a smaller second diameter with a first rate of slope and said internally tapered section has a length that is least twice as long as said first diameter;a valve gate structure having a first end, a second end, an externally tapered section proximate said first end and an externally threaded section proximate said second end, said externally tapered section having a second rate of slope that matches said first rate of slope, wherein said valve gate structure passes into said open central passage of said valve housing so that said externally tapered section of said valve gate structure is disposed a predetermined distance within said internally tapered section of said valve housing and said externally threaded section of said valve gate structure engages said internally threaded section of said valve housing.