公开(公告)号：US4682914A

公开(公告)日：1987-07-28

申请号：US811998

申请日：1985-12-23

申请人： Isamu Aihara ,  Tsuneo Yoshimura

发明人： Isamu Aihara ,  Tsuneo Yoshimura

IPC分类号： E02D17/08

CPC分类号： E02D17/083

摘要： A hydraulic trench support includes a piston and cylinder head supported within a cylinder such that the cylinder head is fixed at one end of the cylinder and the piston is moveable within the cylinder. A piston rod is coupled to the hydraulic piston at one end and extends outside the cylinder and beyond at the other end. A pair of load bearing bases having generally planar construction are attached to the piston rod portion extending beyond the cylinder and to the cylinder head. Means are provided for introducing a fluid under pressure into the cylinder between the inwardly facing surfaces of the cylinder head and piston to provide an outwardly expanding force there between which is coupled to the base members to provide a sidewall retaining force. In one embodiment, spring means are provided which bias the hydraulic trench support toward a contracted position in the absence of fluid pressure.

摘要翻译： 液压沟槽支撑件包括支撑在气缸内的活塞和气缸盖，使得气缸盖固定在气缸的一端并且活塞可在气缸内移动。 活塞杆在一端连接到液压活塞，并延伸到气缸外部并在另一端延伸。 具有大致平面结构的一对承载底座附接到延伸超过气缸和气缸盖的活塞杆部分。 提供了用于将压力下的流体引入气缸中的气缸盖和活塞的向内的表面之间以提供向外扩张的力的装置，在其之间联接到基部构件以提供侧壁保持力。 在一个实施例中，提供弹簧装置，其在没有流体压力的情况下将液压沟槽支撑件朝向收缩位置偏置。