Snap-on Incorporated
HYDRAULIC PUMP WITH SECONDARY SAFETY CHECK VALVE

Abstract:

A hydraulic power unit for a floor jack that includes a secondary safety check valve (SSCV) to provide additional leakdown protection, backing up the main check valve. The SSCV acts as a safety measure to prevent the unit from losing load bearing capabilities if the main check valve fails. In addition, the SSCV acts as a means to prevent debris from entering the main check valve, thereby reducing the chance for failure due to an obstruction.