Variable constant force hydraulic components and systems

摘要: An embodiment of the present invention is a valve for selectively establishing communication fluid between first and second bodies having pressures, respectively. A element carried within body linear reciprocal movement along axis position wherein an operative portion at front blocks are in communication. The responsive to rearward force exerted by on due pressure. less than product pressure cross-sectional area swept element. actuator located or behind applying modulating forward controlling response when positions.