Patent ID: 7082965
Filing Date: 2006-08-01
Classification: F16D,F16K,Y10T

Abstract:
1. A control valve comprising: a solenoid; a valve member having a valve body that is connected to and operatively associated with said solenoid, wherein said valve member has a bore disposed linearly inside said valve body so that a first end of said bore is adjacent said solenoid and a second end of said bore is located at an end of said valve body that is distal from said solenoid; a spool linearly and slidably disposed in said bore, wherein said spool has a first end positioned in said first end of said bore, adjacent said solenoid, and a second end positioned in said second distal end of said bore; a pressure transition region located along said spool between said first end and said second end of said spool, wherein said pressure transition region is formed by a reduced diameter area located on the surface of said spool; an accumulator having a chamber operably connected to said bore wherein said accumulator functions to dampen the movement of said spool; a first dampening chamber defined by an area between said solenoid and said first end of said spool; and a first feedback orifice operably connected between a first dampening chamber and said control passage.