Rod guide and seal system for gas filled shock absorbers

A damper comprising:

• a pressure tube defining a longitudinal axis and forming a working chamber;
• a damper piston disposed within said working chamber, said damper piston dividing said working chamber into an upper working chamber and a lower working chamber;
• a piston rod attached to said damper piston and extending through said pressure tube;
• a rod guide assembly disposed between said piston rod and said pressure tube;
• said rod guide assembly comprising:
• a main housing for guiding the movement of said piston rod;
• an annular bearing disposed between said main housing and said piston rod, said annular bearing slidingly engaging said piston rod;
• a first seal disposed between a first component of said rod guide assembly and said piston rod, said first seal being disposed on a first side of said bearing;
• a second seal disposed between a second component of said rod guide assembly and said piston rod said second seal being disposed on a second side of said bearing opposite said first side;
• a fluid chamber disposed between said first and second seal;
• a lubrication channel extending from said fluid chamber around and outside diameter of said bearing to one of said first and second seals;
• a guide piston movable with respect to said fluid chamber to vary the volume of said fluid chamber.