Patent ID: 6158744
Filing Date: 2000-12-12
Classification: F16J,Y10S

Abstract:
A seal arrangement providing a seal between a bore and a rod movable in said bore, a gap being formed between said bore and said rod, the seal arrangement including a floating elastomeric sealing rind which is accommodated in a circumferential groove around said rod and which sealingly enrages the wall of said bore, and annular resilient biasing means also accommodated in said groove, the biasing means acting between one wall of said groove and the sealing ring and serving to urge the sealing ring against the opposing wall of said groove, the biasing means being configured to allow the passage of fluid past the biasing means between the region of the groove disposed radially inwardly of the sealing ring and the gap between said rod and bore on the side of the sealing ring opposite said opposing wall, the biasing means having, at least at some circumferential positions therearound, a cross-sectional profile which reduces in radial width towards said one wall of said groove, andwherein said biasing means comprises an elastomeric loading ring which provides at least one passage for fluid flow between its radially outer side and its radially inner side.