Abstract: A hydraulic damper for providing fluid damping to a tensioner in a drive system that includes a damper cup, which is mounted to the tensioner and configured to rotate about a central axle in tandem with the tensioner, an end plate having an outer face and an inner face, which is attached to the damper cup forming a fluid chamber, a peg attached to the end plate and extending away from the inner face and toward the damping cup, a damping fluid, which is contained within the fluid chamber, a plurality of shear plates housed within the fluid chamber comprising alternating fixed plates engaged with a fixed component of the tensioner and rotatable plates engaged with a rotatable component of the tensioner where the peg extends through openings in each of the shear plates allowing for rotation of the rotatable plate with the rotation of the peg.

Abstract: A hydraulic damper for providing fluid damping to a tensioner in a drive system that includes a damper cup, which is mounted to the tensioner and configured to rotate about a central axle in tandem with the tensioner, an end plate having an outer face and an inner face, which is attached to the damper cup forming a fluid chamber, a pin attached to the end plate and extending away from the inner face and toward the damping cup, a damping fluid, which is contained within the fluid chamber, a rotatable plate having an opening configured to accept the pin through the rotatable plate and rotate about the central axle, and a fixed plate having an opening configured to accept the pin through the fixed plate, which is fixed to and does not rotate about the central axle. During wind-up and tensioning of the tensioner, a shear force is applied to the rotatable plate moving through the damping fluid to provide damping to the tensioner.