Patent ID: 7137331
Filing Date: 2006-11-21
Classification: E02F,F15B

Abstract:
1. A hydraulic cylinder apparatus, comprising: a pair of hydraulic cylinders that are coupled to a driven member, are placed parallel to each other, and extent/contract in synchronization with each other; a control valve that controls supply/discharge of hydraulic fluid from/to the pair of the hydraulic cylinders; an elastic support mechanism that supports the control valve to each of the pair of the hydraulic cylinders between the pair of the hydraulic cylinders; metallic piping that connects the control valve and each of the pair of the hydraulic cylinders and leads hydraulic fluid controlled by the control valve; and curved portions that are provided at some midpoints of the metallic piping and flexibly deform in accordance with relative displacement of each of the pair of the hydraulic cylinders, wherein: a difference in the relative displacement of each of the pair of the hydraulic cylinders with respect to the control valve is absorbed.