公开(公告)号：US5715861A

公开(公告)日：1998-02-10

申请号：US531094

申请日：1995-09-20

申请人： Richard D. Williams

发明人： Richard D. Williams

IPC分类号： F16K17/04 ,  F16K17/00

CPC分类号： F16K17/046 ,  F16K17/0433 ,  Y10T137/7734 ,  Y10T137/7852

摘要： A pressure relief valve has a moveable piston disposed in a body between inlet and outlet ports in the body. A volumetrically variable enclosed chamber is formed within the body with a portion of the chamber being defined by an upper surface of the piston. At least one aperture extends through the head of the piston providing a fluid passageway between an inlet port of the valve and the enclosed chamber. Fluid captured within the enclosed chamber permits initial rapid movement of the piston head to an open, or relieved, position in the event of a sharp increase in system pressure and provides a hydraulic cushion whereby impact shock of the head against internal valve components is attenuated.

摘要翻译： 减压阀具有设置在主体中的主体中的可移动活塞，该主体在主体中的入口和出口之间。 在体内形成体积可变的封闭腔室，腔室的一部分由活塞的上表面限定。 至少一个孔延伸穿过活塞的头部，在阀的入口和封闭室之间提供流体通道。 在封闭室内捕获的流体允许在系统压力急剧增加的情况下将活塞头初始快速移动到打开或释放的位置，并且提供液压缓冲垫，由此使头部相对于内部阀部件的冲击冲击衰减。

公开(公告)号：US5209302A

公开(公告)日：1993-05-11

申请号：US769054

申请日：1991-10-04

申请人： Leland R. Robichaux ,  Jan T. Hatleskog

发明人： Leland R. Robichaux ,  Jan T. Hatleskog

IPC分类号： E21B19/09

CPC分类号： E21B19/09

摘要： A semiactive heave compensation system for marine vessels, especially floating offshore drilling rigs, is described. The system can be installed in its entirety or can be used to modify existing passive systems by including heave and compensating sensors a microprocessor and a responsive operator to act upon the compensation elements of the system.

摘要翻译： 描述了用于船舶，特别是浮动海上钻机的半主动升沉补偿系统。 可以将系统整体安装，或者可以通过将微处理器和响应操作者的起伏和补偿传感器包括在系统的补偿元件上来起作用来修改现有的被动系统。

公开(公告)号：US4540159A

公开(公告)日：1985-09-10

申请号：US516102

申请日：1983-07-22

申请人： Larry B. Jordan

发明人： Larry B. Jordan

IPC分类号： F16G11/12 ,  B25B25/00 ,  B66D1/50

CPC分类号： F16G11/12

摘要： A hydropneumatic cable tensioner is comprised of an enclosed cylinder featuring a plurality of annular chambers. A fixed cable sheave is mounted to one end of the cylinder. A movable cable sheave is mounted to a piston rod connected to a piston which reciprocates in the innermost or piston bore chamber of the cylinder. Regulated compressed gas is connected to the outer chamber of the cylinder thereby exerting high pressure forces on oil found in the middle or high pressure oil chamber of the cylinder. Pressurized oil forces a piston to move outwardly thereby increasing the distance between the two sheaves and tensioning a cable. Restriction means within the piston bore chamber regulate movement of the piston and prevent uncontrolled acceleration should a cable failure occur.

摘要翻译： 液压气动电缆张紧器由具有多个环形室的封闭气缸构成。 固定的电缆绳轮安装在汽缸的一端。 可移动的缆绳轮安装到连接到活塞的活塞杆上，该活塞在气缸的最内侧或活塞孔腔中往复运动。 调节压缩气体连接到气缸的外部室，从而对气缸的中压或高压油室中发现的油施加高压力。 加压油使活塞向外移动，从而增加两个滑轮之间的距离并拉紧电缆。 活塞孔腔内的限制装置调节活塞的运动，并防止发生电缆故障时不受控制的加速。