Patent ID: 6786477
Filing Date: 2004-09-07
Classification: E02D,F15B

Abstract:
An actuator apparatus comprising:a housing member having walls formed with ports for a pressurized fluid, a first means housed in the housing member, the first means being a piston means displaceable in the housing member, a second means housed in the housing member, the second means being a valve means comprising at least one valve arrangement, the valve arrangement or each valve arrangement being transiently coupled to the piston means and the ports of the housing member, the or each valve arrangement including partitions, wherein at least one of the first and second means is removable or replaceable from the housing member to provide alternative combinations for the actuator apparatus, the or each valve arrangement being operable to supply the pressurized fluid to the piston means whereby the piston means creates driving forces, alternative combinations for the actuator apparatus in use respectively execute a first operation and a second operation, the or each valve arrangement in a first position being rotatable within the housing member whereby the partitions alter coupling connection between the ports of the housing member and the piston means in a predetermined sequence, and at least one valve arrangement being axially movable to a second position wherein the partitions differently alter the coupling connection between the ports of the housing member and the piston means.