Patent ID: 9470049
Filing Date: 2016-10-18
CPC Classification: E21B,F04B,F15B,F16J,F16L

Claim Text:
1. A cylinder accumulator system comprising: a cylinder comprising a cylinder rod, a cylinder barrel coaxial to the cylinder rod, a cylinder end cap coupled to the cylinder barrel and the cylinder rod, and a cylinder piston assembly disposed within the cylinder barrel, wherein the cylinder piston assembly comprises a dynamic sealing arrangement comprising one or more dynamic seals; a first annular volume coaxial to the cylinder rod and the cylinder barrel; a second volume disposed within the cylinder piston assembly; an external high-pressure accumulator; a low-pressure accumulator; and one or more tube manifolds coupling the external high-pressure accumulator and low-pressure accumulator to the cylinder; wherein the cylinder piston assembly comprises a communication path by which a gas media is communicated from the first annular volume to the second volume, substantially equalizing the pressure in a hydraulic fluid located in the second volume and the gas media.