Patent ID: 9222241
Filing Date: 2015-12-29
Classification: E02F,F15B,Y10T

Abstract:
1. A hydraulic system including a reservoir, the hydraulic system for controlling a load, comprising: a housing defining an inlet, a first port, a second port, and a tank galley coupled to the reservoir; a spool valve, including a spool configured to move within the housing, the spool being in fluid communication with the inlet, the first port, the second port, and the tank galley, wherein the spool is configured to meter fluid flow from the inlet to the first port and to meter fluid flow from the second port to the tank galley simultaneously due to the configuration of the spool; and a proportional control element, disposed in the housing and in fluid communication with the second port, wherein the proportional control element is configured to control the fluid flow from the second port, through the housing and past the spool, to the tank galley, and to the reservoir; wherein, the proportional control element and the spool valve are configured to be controlled independently of one another.