Patent ID: 6314982
Filing Date: 2001-11-13
Classification: B64D,Y10T

Abstract:
A fluid link apparatus comprising:a body element,a piston element housed at least partially within said body element and slidably movable along an extension/retraction axis,a body element fluid porta piston element fluid port, andfluid passage means connecting said body element fluid port and said piston element fluid port,said fluid passage means being configured so that the net displacement of fluid between said body element fluid port and said piston element fluid port upon extension or retraction of said piston element relative to said body element within pre-set limits is nil or relatively low,wherein said body element includes two seal regions which seal against the piston element at longitudinally spaced locations and allow sliding movement of said piston element, andthe piston element includes a collar element arranged to co-operate with said seal regions to limit routine extension movement of the piston element.