Construction Machine
Number of patents in Portfolio can not be more than 2000
United States of America
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N/A
Issued Date -
Nov 21, 2024
app pub date -
Dec 16, 2022
filing date -
Dec 16, 2022
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
Provided is a construction machine having a front work implement to be coupled with an attachment via a quick hitch, a directional control valve that controls pressurized fluid delivered from a hydraulic pump and drives an actuator of the front work implement, and an operation lever that operates the directional control valve. The construction machine also includes a lock port to be connected to a lock-side hydraulic chamber of a lock cylinder of the quick hitch, an unlock port to be connected an unlock-side hydraulic chamber of the lock cylinder, a selector valve that switches connection destinations of the lock port and the unlock port to any one of the hydraulic pump and a reservoir, a switch that operates the selector valve, a pilot drive type relief valve disposed in a hydraulic line connecting the hydraulic pump and the selector valve, and a relief pilot line that connects, to a hydraulic chamber of the relief valve, a hydraulic line to be boosted as a result of an operation of the operation lever.
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