Patent ID: 6070408
Filing Date: 2000-06-06
Classification: F15B

Abstract:
A hydraulic apparatus for actuating a varying hydraulic load between a minimum displacement L.sub.min and a maximum displacement L.sub.max ; said hydraulic apparatus comprised of:a supply means including a reciprocating power displacement piston operating reciprocally between a minimum displacement D.sub.min and a maximum displacement D.sub.max ;an accumulator in communication with said supply means, said accumulator including an accumulator piston operating between a minimum displacement P.sub.min and a maximum displacement P.sub.max, and a piston position sensing means for sensing the position of the accumulator piston, said accumulator further including a gas spring portion with a gas regulating valve; anda control means in communication with said supply means and said piston position sensing means for selectively initiating a cycling of said supply means between said minimum displacement D.sub.min and said maximum displacement D.sub.max in response to the sensed position of said accumulator piston.