Patent ID: 9416798
Filing Date: 2016-08-16
CPC Classification: E02B,F15B

Claim Text:
1. A hydraulic circuit comprising: a hydraulic power supplier including a tank configured to store hydraulic oil, and a hydraulic pump coupled to the tank and configured to feed hydraulic pressure oil; a stack valve coupled to the hydraulic power supplier, the stack valve including a direction switching valve configured to control supply/discharge of the hydraulic pressure oil from the hydraulic power supplier to a hydraulic device; a multifunction valve provided in the vicinity of the hydraulic device, the multifunction valve including (i) a first stop valve and a second stop valve which respectively open/close a first supply/discharge circuit and a second supply/discharge circuit for the hydraulic device, and (ii) a bypass circuit positioned closer to the stack valve than the first stop valve and the second stop valve, the bypass circuit including a third stop valve; and a composite valve coupled to the hydraulic power supplier, the stack valve, and the multifunction valve, wherein the composite valve includes: