Gm Global Technolgoy Operations, Inc.

Thomas N Tiller

Joel R Wells

Daniel P Zaenglein

A compression valve assembly includes a valve cage having a stem at a first end and an annular skirt at a second end. The skirt is provided with a slidable surface. A relief valve is adapted for selectively blocking fluid flow through the valve cage. A cup includes an annular rim and a base. The rim is provided with a slidable surface. A spring biased agaist the relief valve is selectively compressed as the cup rim is slidably received over the skirt by a measured axial load provided by a preloading means. The cup is secured to the valve cage and the axial load is removed.

Preloaded compression valve and method for a hydraulic damper

A load cell exerts a force on a loose spring cage of a rebound spring to displace the cage and hold it in position on the piston of a hydraulic damper unit until it is welded in position. This preloads the rebound spring to close tolerance so that rebound valve operation is constant regardless of variation in spring sizes, rates and stack up heights of valve components.

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Germantown, OH, United States of America

Thomas N Tiller