公开(公告)号：US20050145400A1

公开(公告)日：2005-07-07

申请号：US11014466

申请日：2004-12-16

申请人： Jack Ottestad ,  Craig Berard

发明人： Jack Ottestad ,  Craig Berard

IPC分类号： B25D9/12 ,  B25D9/14 ,  B25D9/20 ,  E21B1/00

CPC分类号： B25D9/12 ,  B25D9/145 ,  B25D9/20 ,  B25D2209/002 ,  B25D2209/005

摘要： An impact tool has a slidable hammer that is driven by hydraulic oil under pressure inside a chamber. The hydraulic oil is pressurized by a piston driven by compressed gas on the opposite side of the piston from the hydraulic oil. The gas in the gas chamber is compressed by the piston on an initial stroke, and has a large annular chamber holding the gas so that higher average gas pressure can be attained during the power stroke. As the piston is moved to compress the gas, the piston lifts a valve that opens a passage for the hydraulic oil moved by the piston to act on a hammer to impact a breaking tool. The piston is a two part piston that serves to lower the inertia during the final closing of the valve, and thereby reduces impact loads on the valve as it is closed. The valve also is controlled as to its stroke for efficient operation.

摘要翻译： 冲击工具具有可滑动的锤子，其在室内的压力下由液压油驱动。 液压油由活塞驱动的活塞与液压油在活塞的相反侧被加压。 气体室中的气体在初始行程中被活塞压缩，并且具有保持气体的大环形室，使得在动力冲程期间可以获得更高的平均气体压力。 当活塞移动以压缩气体时，活塞提升阀，该阀为通过活塞移动的液压油打开通道，以作用于锤子以冲击破碎工具。 活塞是两部分活塞，用于在阀的最终关闭期间降低惯性，从而减少阀关闭时的冲击载荷。 阀门也被控制为其行程以有效操作。