Patent ID: 6117033
Filing Date: 2000-09-12
Classification: F16H

Abstract:
A hydraulic tensioner comprising:a housing having a bore,a hollow piston slidably received within said bore, said piston having an upper and a lower end, said lower end having an opening that defines a fluid chamber with said bore,a generally cylindrical center member located within said fluid chamber in said bore,a first piston spring part located within said fluid chamber, said first piston spring part biasing said cylindrical center member in a protruding direction from said bore,a second piston spring part located within said hollow piston, said second piston spring part biasing said piston in a protruding direction from said bore, anda check valve provided between the fluid chamber and a source of pressurized fluid, said check valve permitting fluid flow into said fluid chamber while restricting flow in the reverse direction.