Case Corporation

Ian MacLeod

Guy T Stoever

Richard J Lech

Dennis J Heyne

Eric Sharkness

David W Swaim

The invention provides a system for regulating pressure equalization in hydraulic mechanisms to suppress oscillation in heavy equipment. The system includes a first and second hydraulic lines, a crossover valve in communication with each of the first and second hydraulic lines, a timing system in communication with the crossover valve, and a motion detector in communication with a heavy equipment component. The motion detector senses a linkage motion and operatively opens the crossover valve, which remains open as directed by the timing system.

Hydraulic system for suppressing oscillation in heavy equipment

The invention provides a method and system for regulating pressure equalization in hydraulic mechanisms. The system includes a main body, a thermal element positioned within the main body, a pin positioned adjacent to the thermal element, and an orifice spool in communication with the pin. The thermal element expands to force the pin to reposition the orifice spool, and restrict fluid flow through the main body. The method includes expanding a thermal polymer when temperature increases, contracting the thermal polymer when the temperature decreases, and metering fluid flow based on the expanding and contracting of the thermal polymer.

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Ames, IA, United States of America

Ian MacLeod