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公开(公告)号:US4964477A
公开(公告)日:1990-10-23
申请号:US355171
申请日:1989-05-22
IPC分类号: E21B4/14
CPC分类号: E21B4/145
摘要: A pneumatic percussive device has a casing (1) accomodating a movable hammer piston dividing the interior space of the casing (1) into two chambers. One of these chambers (7) alternately communicates, by means of an air distribution arrangement (3) having a movable actuator member (8), with a compressed air source and with the environment. In addition, said chamber (7) communicates, via a throttling passage (27), with a cavity (10) of the air distribution arrangement (3) the pressure in which ensures movement of the actuator member to one of its limit positions.
摘要翻译: 气动冲击装置具有壳体(1),其容纳将壳体(1)的内部空间分成两个腔室的活动锤活塞。 这些腔室(7)中的一个通过具有可移动致动器构件(8)的空气分配装置(3)与压缩空气源和环境交替地连通。 此外,所述腔室(7)经由节流通道(27)与空气分配装置(3)的空腔(10)连通,确保致动器构件运动到其极限位置之一的压力。