Patent ID: 6244982
Filing Date: 2001-06-12
Classification: F16H,Y10T

Abstract:
A hydraulic tensioner for a power transmission system comprising:a cylinder and piston assembly, said cylinder having an inner chamber, said piston assembly slidably received within said inner chamber, said piston assembly movable between a retracted position and an extended position along a central axis of said cylinder, said piston assembly further adapted to operate to tension said power transmission system,a source of pressurized fluid in fluid communication with said inner chamber of said cylinder,a piston spring located between said inner chamber and said piston assembly, said pressurized fluid and said spring biasing said piston assembly in an extending direction from said cylinder,said piston assembly including at least two piston elements, each of said piston elements being slidable along said central axis of said cylinder, and at least one of said piston elements having a passage extending therethrough.