专利名称：VALVE ACTUATION VELOCITY CONTROL
DEVICE
发明人：JAMES, R. NANCI,JAMES, E. LUZADER申请号：AU2003301182申请日：20031219公开号：AU2003301182A1公开日：20040714
摘要：The present invention is directed for use in a valve assembly including a housinghaving an axis and defining an interior, with fluid provided in the housing and substantiallyfilling the housing interior, a valve stem disposed in the housing interior and a pistonattached to the valve stem, wherein the piston and valve stem are moveable along thehousing axis within the housing interior between first and second positions. The presentinvention includes a valve actuation control device disposed in the housing interior, thevalve actuation control device allowing the fluid to freely flow from one side of thepiston to the other side during at least a portion of the piston's movement between thefirst and second positions.
申请人：RALPH A. HILLER COMPANY
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