of the invention therefore bladders separating a single fluid chamber into two fluid chambers and having a shaft passing there through have not been implemented it is assumed that they were not used in such situations because it was not readily evident how to effectively maintain the fluid seal between the shaft 120 and the hole that would be needed in the bladder for the shaft to pass through cf fox u s pat no 6 415 895 o rings between piston and rod note that in u s pat no 2 708 112 a metallic member is used to define a reservoir and surrounds a shaft but it is intended in that patent that fluid can pass from inside the reservoir to outside the reservoir however in the present invention damping fluid is completely retained on one side of the bladder in the bladder fluid chamber and we have found a way to implement a bladder around a shaft without having to worry about any sealing losses due to for example degradation of o rings thus according to this exemplary embodiment of the invention as fluid either enters cylinder body 110 via valve v 1 or is moved due to shaft 120 and piston 195 fig6 the increasing volume of fluid within chamber 115 will result in the partial compression of bladder 200 against the internal pressure of gas g in the direction of arrows f then as fluid either leaves the cylinder body 110 via valve v 2 or has more volume to fill due to the retraction of shaft 120 and piston 195 the internal pressure of gas g will result in the expansion of the.