# US 2026/0085488 A1 · Tool control system for work vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0085488 A1 - Document ID: US20260085488A1 - Status: Published application - Kind: A1 - Application number: 19/333,212 - Filed: 2025-09-18 - Published: 2026-03-26 - Earliest claimed: 2024-09-20 - Assignees: Komatsu America Corp. - Applicants: Komatsu America Corp. - Inventors: Patrick Earl ANDERSON; Kendrick Michael GIBSON; Jeffrey Bertrand HUNTINGTON - Web page: https://patentgrep.com/patent/US20260085488A1 ## CPC - E02F 3/435: {for dipper-arms, backhoes or the like} - E02F 9/2203: {Arrangements for controlling the attitude of actuators, e.g. speed, floating function} - E02F 9/2228: {including an electronic controller} - E02F 9/2267: {Valves or distributors (position of valves arrangements on upper-structures E02F9/0875)} - E02F 9/2292: {Systems with two or more pumps} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract A work vehicle includes a main body, a boom pivotably connected to the main body, an arm pivotably connected to the boom, and a tool connected to the arm. A tool control system for the work vehicle includes a boom cylinder to extend and retract the boom, an arm cylinder to extend and retract the arm, at least one input device usable to input intentions of an operator based on manipulation directions, a diverter connecting the boom and arm cylinders, and a controller. The diverter can carry working fluid exiting the boom cylinder into the arm cylinder. The diverter includes a diverter passage, and a diverter valve disposed in the diverter passage to control an amount of the working fluid flowing through the diverter passage. The controller controls the boom and arm cylinders, and the diverter valve to control the amount of the working fluid flowing through the diverter passage. ## Claims ### Claim 1 A tool control system for a work vehicle including a main body, a boom pivotably connected to the main body, an arm pivotably connected to the boom, and a tool connected to the arm, the tool control system comprising: a boom cylinder configured to extend the boom from the main body and retract the boom to the main body; an arm cylinder configured to extend the arm from the boom and retract the arm to the boom; at least one input device usable to input intentions of an operator based on manipulation directions of the at least one input device; a diverter connecting the boom cylinder and arm cylinder, the diverter being configured to carry working fluid exiting the boom cylinder into the arm cylinder, the diverter including a diverter passage, and a diverter valve disposed in the diverter passage to control an amount of the working fluid flowing through the diverter passage; and a controller configured to control the boom cylinder and the arm cylinder in response to the manipulation directions of the at least one input device, and the diverter valve to control the amount of the working fluid flowing through the diverter passage. ### Claim 2 (depends on 1) The tool control system according to claim 1, further comprising: a diverter control element connected to the controller, the diverter control element being operable by the operator to control the diverter valve using the controller. ### Claim 3 (depends on 2) The tool control system according to claim 2, wherein the diverter control element includes at least one of a button, a switch, and a touch screen. ### Claim 4 (depends on 1) The tool control system according to claim 1, wherein the diverter valve is switchable between at least a closed position and at least one open position, the working fluid not flowing through the diverter passage when the diverter valve is in the closed position. ### Claim 5 (depends on 4) The tool control system according to claim 4, wherein when diverter valve is in the at least one open position, a hydraulic flow from a pump to the arm cylinder may be reduced to save energy. ### Claim 6 (depends on 1) The tool control system according to claim 1, wherein the diverter path connects an outflow side of the boom cylinder during extending of the boom, and an inflow side of the arm cylinder during extending of the arm. ### Claim 7 (depends on 6) The tool control system according to claim 6, wherein the boom cylinder is retracted during extending of the boom, and the arm cylinder is extended during extending of the arm. ### Claim 8 (depends on 1) The tool control system according to claim 1, wherein the at least one input device includes a first input device usable to input intentions of an operator based on manipulation directions of the first input device, and a second input device usable to input intentions of an operator based on manipulation directions of the second input device. ### Claim 9 (depends on 8) The tool control system according to claim 8, wherein one of the first and second input devices is usable to control movement of the boom, and an other of the first and second input devices is usable to control movement of the arm. ### Claim 10 (depends on 8) The tool control system according to claim 8, wherein the first input device is a control lever, and the second input device is a control lever. ### Claim 11 (depends on 1) The tool control system according to claim 1, wherein the at least one input device includes a control lever. ### Claim 12 (depends on 1) The tool control system according to claim 1, wherein the tool includes a feller head. ### Claim 13 A work vehicle comprising: a main body; a boom pivotably connected to the main body; an arm pivotably connected to the boom; a tool connected to the arm; and a tool control system including a boom cylinder configured to extend the boom from the main body and retract the boom to the main body; an arm cylinder configured to extend the arm from the boom and retract the arm to the boom; at least one input device usable to input intentions of an operator based on manipulation directions of the at least one input device; a diverter connecting the boom cylinder and arm cylinder, the diverter being configured to carry working fluid exiting the boom cylinder into the arm cylinder, the diverter including a diverter passage, and a diverter valve disposed in the diverter passage to control an amount of the working fluid flowing through the diverter passage; and a controller configured to control the boom cylinder and the arm cylinder in response to the manipulation directions of the at least one input device, and the diverter valve to control the amount of the working fluid flowing through the diverter passage. ### Claim 14 (depends on 13) The work vehicle according to claim 13, wherein the tool control system further includes a diverter control element connected to the controller, the diverter control element being operable by the operator to control the diverter valve using the controller. ### Claim 15 (depends on 14) The work vehicle according to claim 14, wherein the diverter control element includes at least one of a button, a switch, and a touch screen. ### Claim 16 (depends on 13) The work vehicle according to claim 13, wherein the diverter valve is switchable between at least a closed position and at least one open position, the working fluid not flowing through the diverter passage when the diverter valve is in the closed position. ### Claim 17 (depends on 16) The work vehicle according to claim 16, wherein when diverter valve is in the at least one open position, a hydraulic flow to the arm cylinder from a pump may be reduced to save energy. ### Claim 18 (depends on 13) The work vehicle according to claim 13, wherein the diverter path connects an outflow side of the boom cylinder during extending of the boom, and an inflow side of the arm cylinder during extending of the arm. ### Claim 19 (depends on 18) The work vehicle according to claim 18, wherein the boom cylinder is retracted during extending of the boom, and the arm cylinder is extended during extending of the arm. ### Claim 20 (depends on 13) The work vehicle according to claim 13, wherein the at least one input device includes a first input device usable to input intentions of an operator based on manipulation directions of the first input device, and a second input device usable to input intentions of an operator based on manipulation directions of the second input device. ### Claim 21 (depends on 20) The work vehicle according to claim 20, wherein one of the first and second input devices is usable to control movement of the boom, and an other of the first and second input devices is usable to control movement of the arm. ### Claim 22 (depends on 20) The work vehicle according to claim 20, wherein the first input device is a control lever, and the second input device is a control lever. ### Claim 23 (depends on 13) The work vehicle according to claim 13, wherein the at least one input device includes a control lever. ### Claim 24 (depends on 13) The work vehicle according to claim 13, wherein the tool includes a feller head.