Patent ID: 9091355
Filing Date: 2015-07-28
Classification: F16K,G05D,Y10T

Abstract:
1. A valve assembly, comprising: a tubular poppet comprising a first end, a second end opposite the first end, a hollow internal central region open at the first end and enclosed at the second end, and a poppet seat located at the second end; a hole set comprising at least one hole in the tubular poppet located towards the second end; a cylindrical control sleeve attached to the second end, the control sleeve configured to slide between the second end towards the first end in an open position, wherein when the control sleeve is in the open position at least a portion of the hole set is exposed creating an unrestrained main flow channel between the central region and an outside region of the poppet through the hole set, wherein the control sleeve comprises a control face facing the first end and an opposing parallel forward face, the forward face and the control face having substantially equal outer diameters; and a spring positioned around the tubular poppet and configured such that the spring naturally pushes the control sleeve towards the second end in a closed position so when the control sleeve is in the closed position the control sleeve circumferentially abuts the poppet seat which stops further movement of the control sleeve towards the second end forming a seal which extinguishes the unrestrained main flow channel, wherein an outside diameter of the spring at a particular location on the spring exceeds an outside diameter of a corresponding location on the tubular poppet.