Differential piston has front surface which closes first fluid chamber and rear surface closing second chamber, chambers being fed with fluid via three fixed fluid channels and fourth, vertical channel through piston behind rear surface

摘要

The differential piston has a front surface (4) which closes a first fluid chamber (8) and a rear surface (6) which closes a second chamber (9). These are fed with fluid via three fixed fluid channels (10, 11, 12) and a fourth, vertical channel (13) through the piston behind the rear surface.