Patent ID: 6619309
Filing Date: 2003-09-16
Classification: G05D,Y10T

Abstract:
A device for controlling the flow through a vacuum extraction manifold port comprising:a hollow pipe having a first portion and a second portion, said pipe having a cavity and comprising a retaining surface disposed within said cavity, said pipe further comprising exit ports; a poppet having a front section and a rear section slidably mounted within said cavity, said front section of said poppet being attached to said first portion of said pipe by a biasing means; an actuator rod disposed within said cavity, said actuator rod having a first end attached to said rear section of said poppet, said actuator rod further comprising a second end; and actuating means disposed at said second end of said pipe, said actuating means being connected to said second end of said actuator rod, wherein: (a) during introduction of a gaseous flow into said first portion of said pipe at less than a first pressure, said poppet remains in an intermediate position in said cavity thereby permitting said gaseous flow to travel through said first portion of said pipe, past said poppet and to exit said pipe through said exit ports; and (b) during introduction of said gaseous flow into said first portion of said pipe at greater than a second pressure, said pressure of said gaseous flow causes said poppet to slide against said retaining surface thereby establishing a seal and confining said gaseous flow within said cavity; and (c) during introduction of said gaseous flow at greater than a third pressure, said actuating means causes said actuator rod to drive said poppet against said retaining ring thereby establishing said seal and confining said gaseous flow within said cavity.