US 12,378,747 B2
Universal hydraulic auxiliary depressurization circuit
Mark W. Thompson, Manhattan, KS (US); Jeffrey R. Peterson, Wamego, KS (US); and Trent R. Stefek, Wamego, KS (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on May 9, 2022, as Appl. No. 17/739,542.
Prior Publication US 2023/0358012 A1, Nov. 9, 2023
Int. Cl. E02F 3/36 (2006.01)
CPC E02F 3/3663 (2013.01) [E02F 3/3627 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic system for depressurizing a work tool auxiliary circuit of a work machine, the hydraulic system comprising:
a power source for powering the hydraulic system;
a reservoir of hydraulic fluid;
a plurality of hydraulic lines;
a pressure source for supplying the hydraulic fluid throughout the plurality of hydraulic lines;
a control valve for regulating a flow of the hydraulic fluid;
a depressurize line connected to at least one of the plurality of hydraulic lines and the reservoir, the depressurize line includes an electromechanical valve for regulating a flow of hydraulic fluid in the depressurize line;
a controller configured to communicate with the electromechanical valve via a power circuit; and
a coupler switch comprising at least three positions configured to communicate with the controller, at least one of the three positions actuates the electromechanical valve to depressurize the work tool auxiliary circuit.