Patent ID: 6390254
Filing Date: 2002-05-21
Classification: F16F

Abstract:
A fixed volume damper comprising:a hollow cylindrical housing having first and second ends to form an interior chamber; a piston movable in the interior chamber so as to form a first subchamber between the piston and the first end and a second subchamber between the piston and the second end; a restrictive fluid passageway between the first and second subchambers to provide damping when the piston is moved; a source of fluid under pressure; means independent of piston movement for applying a pressurizing bias force thereto; and, valve means connected between the source of fluid and the first and second subchambers, operative in accordance with an increase of differential pressure between the source of fluid and the first and second subchambers respectively, to open a fluid passage and supply additional fluid to the subchamber which increases in volume when the piston is moved so as to prevent cavitation.