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2. 发明申请

WO2006047386A2 UNDERGROUND PIERCING TOOL 审中-公开
标题翻译：地下施工工具
公开(公告)号：WO2006047386A2
公开(公告)日：2006-05-04
申请号：PCT/US2005/038123
申请日：2005-10-20
申请人： ALLIED CONSTRUCTION PRODUCTS, LLC , PRESTON, Duane , GRABNIC, Michael , MARSALEK, Dan
发明人： PRESTON, Duane , GRABNIC, Michael , MARSALEK, Dan
IPC分类号： E21B7/26
CPC分类号： E21B4/145 , E21B7/26
摘要： A pneumatically operated underground piercing tool that includes an elongate cylindrical body carrying an anvil at one end and with a striker slidably received within a chamber defined by the body. An end cap, threadedly engaged with another end of the body, captures a striker within the chamber. A valve assembly controls the communication of pressurized air to and from the body and is operator adjustable in order to produce forward or rearward movement of the piercing tool. A strong threaded engagement between the body and the end cap is provided by a tapered buttress thread. The striker defines a plurality of balancing grooves which aid in the uniform distribution of pressurized fluid around the striker. A recess is formed in an end wall of the striker to inhibit pressurized fluid from being trapped between the striker and the end cap when the striker is reciprocated within the body. The striker includes oblong or slot-shaped radial ports in which the long dimension of the port is parallel to a centerline of the striker. A tail adaptor is threadedly secured to the end cap using tapered buttress thread configurations and an exhaust bushing received by the end cap is secured in its operative position by the tail adaptor. The valve assembly includes a detent mechanism including a finger member slidably held on a valve spool support. Flats formed on the support are engaged by internal flat surfaces formed on an inside bore of the finger member which permits sliding movement while resisting relative rotation. The control spool is coupled to an end of said valve support by structure which includes a spherical element formed on the support that is held in an elastomeric socket which, in turn, is received by an internal bore in the valve spool. A snap ring maintains the socket within the bore of the valve spool.
摘要翻译：一种气动操作的地下穿孔工具，其包括在一端承载砧座的细长圆柱形主体和可滑动地容纳在由主体限定的室内的撞针。与主体的另一端螺纹连接的端盖捕获腔室内的撞针。阀门组件控制加压空气与身体的连通，并且操作者可调节以产生穿孔工具的向前或向后运动。主体和端盖之间的强螺纹接合由锥形支撑螺纹提供。撞击器限定多个平衡槽，其有助于加压流体围绕撞针的均匀分布。在冲击器的端壁中形成有一个凹槽，当冲头在体内往复运动时，阻止加压流体被捕获在撞针和端盖之间。撞击器包括长方形或槽形的径向端口，其中端口的长尺寸平行于撞针的中心线。尾部适配器使用锥形支撑螺纹构造螺纹固定到端盖，并且由端盖接收的排气衬套由尾部适配器固定在其操作位置。阀组件包括止动机构，其包括可滑动地保持在阀芯支撑件上的指状构件。形成在支撑件上的平板由形成在指状构件的内孔上的内部平坦表面接合，这允许在抵抗相对旋转的同时滑动运动。控制卷轴通过结构联接到所述阀支撑件的端部，该结构包括形成在支撑件上的球形元件，该球形元件保持在弹性体插座中，弹性体插座又由阀芯中的内孔容纳。卡环将阀芯保持在阀芯的孔内。

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