Patent ID: 9217235
Filing Date: 2015-12-22
Classification: E02F,Y10T

Abstract:
1. A tool coupler system for a machine, comprising: a tool coupler having a hydraulic actuator configured to selectively lock a tool to the machine; a first hydraulic pump configured to selectively generate a first flow of fluid pressurized to a first pressure and supply the fluid pressurized to the first pressure to the hydraulic actuator of the tool coupler and at least one other hydraulic actuator, wherein the first hydraulic pump is configured to supply the first flow of fluid pressurized to the first pressure to the hydraulic actuator of the tool coupler to lock the tool to the machine; a second hydraulic pump configured to selectively generate a second flow of fluid pressurized to a second pressure and supply the fluid pressurized to the second pressure to the hydraulic actuator of the tool coupler, wherein the second hydraulic pump is configured to supply the second flow of fluid pressurized to the second pressure to the hydraulic actuator of the tool coupler to maintain the tool coupler in the locked position, wherein the second flow of fluid pressurized to the second pressure is less than an amount required to move the hydraulic actuator of the tool coupler to either lock or unlock the tool from the machine; and a shuttle valve configured to selectively move to a first position when the first pressure is greater than the second pressure to allow the first flow of fluid pressurized to the first pressure to flow through the shuttle valve in a first direction to supply pressurized fluid from the first hydraulic pump to the hydraulic actuator of the tool coupler, or to a second position when the second pressure is greater than the first pressure to allow the second flow of fluid pressurized to the second pressure to flow through the shuttle valve in a second direction opposite the first direction to supply pressurized fluid from the second hydraulic pump to the hydraulic actuator of the tool coupler.