Patent ID: 6681870
Filing Date: 2004-01-27
Classification: F15B,F16C

Abstract:
A hydraulically powered mechanism comprising:an item of equipment; a piston assembly arranged to be driven by hydraulic fluid acting on the piston assembly in a working zone, the piston assembly presenting a face which acts at an interface against a complemental face on the item of equipment thereby to drive the item of equipment, the piston assembly including a piston and a strut, the piston being cup-shaped to receive an end of the strut remote from the interface and the strut acting between the piston and the item of equipment; and a fluid supply passage for supplying hydraulic fluid from the working zone to the interface, a portion of the passage extending through the strut to the interface and another portion of the passage extending from the working zone, through the base of the piston, to communicate with the portion of the passage extending through the strut.