Patent ID: 6651546
Filing Date: 2003-11-25
Classification: F15B

Abstract:
A multi-stroke fluid cylinder comprising:a) a head assembly having a fluid inlet for introducing fluid to the cylinder at a first pressure; b) a first positioning system including a plurality of pistons capable of moving a piston rod away from at least a portion of said first positioning system; and c) a second positioning system operatively positioned between said head assembly and said first positioning system for imparting movement of said first positioning system pistons to the piston rod, said second positioning system comprising: a plurality of movable pistons for moving said piston rod a preselected distance; at least one fluid supply member secured to a respective one of said pistons of said second positioning system for introducing a fluid between adjacent pistons of said second positioning system, wherein said fluid supply member extends within said first positioning system when said positioning systems are fully extended.