Patent ID: 8281506
Filing Date: 2012-10-09
Classification: E02F,Y10T

Abstract:
1. A tool coupler assembly, comprising: a coupler frame; a first latch connected to the coupler frame; a second latch connected to the coupler frame; a hydraulic actuator connected to move the second latch relative to the first latch and the coupler frame, the hydraulic actuator having: a pressure valve having a check element movable to allow a flow of fluid into the first chamber via the first port based on a pressure of fluid in the first chamber, and a pressure-regulating element movable to allow a flow of fluid out of the first chamber via the first port based on a pressure of fluid in the second chamber; and a first pilot passage configured to communicate fluid from the second chamber with the pressure-regulating element to move the pressure-regulating element; and a second pilot passage configured to communicate fluid from the first chamber with the pressure-regulating element to move the pressure-regulating element.