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公开(公告)号：US5407021A
公开(公告)日：1995-04-18
申请号：US44204
申请日：1993-04-08
摘要： A down-the-hole hammer drill having a reverse circulation system which conducts pressurized air downwardly to a lower cutting face of a drill bit. The air travels across the cutting face and upwardly through a central exhaust passage. The air is conducted to the cutting face through longitudinal and lateral passages in the bit which are kept isolated from the environment surrounding the bit so that no appreciable amount of pressurized air can escape, and so that the passages do not become clogged with dirt. The drill bit comprises upper and lower pieces. Upper sections of the longitudinal passages are formed in the upper piece, and lower sections of the longitudinal passages are formed in the lower piece.
摘要翻译： 一种井下锤钻具有反向循环系统，其将加压空气向下传送到钻头的下切割面。 空气穿过切割面并向上穿过中央排气通道。 通过钻头中的纵向和横向通道将空气传导到切割面，该通道与钻头周围的环境保持隔离，使得没有明显的加压空气可以逸出，并且使得通道不会被灰尘堵塞。 钻头包括上部和下部部件。 纵向通道的上部形成在上部件中，并且纵向通道的下部形成在下部件中。
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公开(公告)号：US5060740A
公开(公告)日：1991-10-29
申请号：US529377
申请日：1990-05-29
申请人： Faisal J. Yousef , Robert F. Kane , Joel Ham , David Mildren
发明人： Faisal J. Yousef , Robert F. Kane , Joel Ham , David Mildren
IPC分类号： E21B17/042 , F16B33/02 , F16L15/06
CPC分类号： F16B33/02 , E21B17/0426 , Y10T403/68
摘要： A thread coupling comprises two interconnected screw threads. Each of the screw threads has a root portion shaped as a portion of an ellipse. With respect to one of the threads having such a shape, the major axis of the ellipse is longer than that of the other thread.
摘要翻译： 螺纹联接器包括两个互连的螺纹。 每个螺纹具有形成为椭圆的一部分的根部部分。 对于具有这种形状的螺纹中的一个，椭圆的长轴比其它螺纹长。
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公开(公告)号：US5163523A
公开(公告)日：1992-11-17
申请号：US766390
申请日：1991-09-27
申请人： Faisal J. Yousef , Robert F. Kane , Joel Ham , David Mildren
发明人： Faisal J. Yousef , Robert F. Kane , Joel Ham , David Mildren
IPC分类号： E21B17/042 , F16B33/02
CPC分类号： E21B17/0426 , F16B33/02
摘要： A driver sub and a case for enclosing a piston chamber of a percussion drill are threadedly connected by respective identical male and female screw threads. Each of the identical male and female screw threads includes a root portion, the shape of which is defined by portions of two axially overlapping ellipses interconnected by a flat.
摘要翻译： 用于封闭冲击钻的活塞室的驱动器副壳和壳体通过相应的相同的公螺纹和内螺纹螺纹连接。 每个相同的公螺纹和内螺纹包括根部，其形状由两个通过平面互连的轴向重叠椭圆的部分限定。
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公开(公告)号：US5090500A
公开(公告)日：1992-02-25
申请号：US619966
申请日：1990-11-30
申请人： Faisal J. Yousef , Robert F. Kane
发明人： Faisal J. Yousef , Robert F. Kane
CPC分类号： E21B17/1085 , E21B17/1078 , E21B4/14
摘要： A percussion drill includes a reciprocating piston surrounded by a cylindrical casing. Disposed at opposite ends of the cylindrical casing are replaceable hollow cylindrical wear sleeves. The wear sleeves are mounted within recesses formed in the outer surface of the casing. Each wear sleeve has a thickness equal to the depth of its respective recess. A longitudinal inner end of each wear sleeve is spaced longitudinally from an end surface of the recess, and a flexible seal is situated between those opposing ends. The wear sleeves can be replaced after being worn by the abrasive environment encountered in the hole being drilled. The wear sleeves may be formed of a more wear resistant material than the casing.
摘要翻译： 冲击钻包括由圆柱形壳体包围的往复式活塞。 在圆柱形壳体的两端设置可更换的中空圆柱形磨损套管。 磨损套管安装在形成于外壳外表面的凹槽中。 每个磨损套筒的厚度等于其相应凹部的深度。 每个磨损套筒的纵向内端部与凹部的端面纵向间隔开，并且柔性密封件位于这些相对端之间。 在被钻孔中遇到的磨蚀环境磨损后，可以更换磨损套筒。 磨损套筒可以由比外壳更耐磨的材料形成。
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公开(公告)号：US5056611A
公开(公告)日：1991-10-15
申请号：US529575
申请日：1990-05-29
申请人： Faisal J. Yousef , Robert F. Kane , Joel Ham , David Mildren
发明人： Faisal J. Yousef , Robert F. Kane , Joel Ham , David Mildren
IPC分类号： E21B17/042 , F16B31/06 , F16B33/02
CPC分类号： F16B33/02 , E21B17/0426
摘要： A screw thread structure includes a root portion, the shape of which is defined by portions of two axially overlapping ellipses interconnected by a flat.
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公开(公告)号：US4761191A
公开(公告)日：1988-08-02
申请号：US945837
申请日：1986-12-23
CPC分类号： B23P15/28 , B23P9/00 , C21D1/00 , C21D1/68 , E21B10/56 , Y10T29/49865 , Y10T29/49945
摘要： A method of forming precision openings in hardened steel workpieces is disclosed. The method generally includes drilling nominal size openings in the workpiece while it is in a soft condition. Thereafter, sizing plugs formed from a material having a strength greater than that of the steel body during a predetermined range of temperatures are press-fitted in the openings. With the plugs in position, the body is heat treated to harden it. Subsequently, the plugs are removed and the resulting openings are found to be of an extremely uniform size without the wide variations present when hardening is performed without the sizing plugs.
摘要翻译： 公开了一种在硬化钢工件中形成精密开口的方法。 该方法通常包括在处于软状态下在工件上钻出公称尺寸的开口。 此后，在预定的温度范围内将具有比钢体强度大的强度的材料形成的定径塞压配合在开口中。 将插头置于适当的位置，将身体进行热处理以使其硬化。 随后，除去塞子并且发现所得到的开口具有非常均匀的尺寸，而在没有尺寸塞的情况下执行硬化时，不存在宽的变化。
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公开(公告)号：US4867015A
公开(公告)日：1989-09-19
申请号：US197507
申请日：1988-04-25
摘要： A rock drilling bit comprises a steel body defining a cutting face with hard material inserts press-fitted into preformed openings in the cutting face. The inserts have ends extending outwardly of the cutting face which perform the actual drilling or cutting operation. The face surface of the body is case hardened except for narrow continuous bands about each insert opening. A method particularly suited for forming the case hardened cutting face is also disclosed.
摘要翻译： 岩石钻头包括限定切削面的钢体，硬质材料刀片压配合到切削面中的预成型开口中。 插入件具有从切割面向外延伸的端部，其执行实际的钻孔或切割操作。 除了围绕每个插入开口的窄连续带外，机体的表面被表面硬化。 还公开了一种特别适用于形成壳体硬化切割面的方法。
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公开(公告)号：US4756373A
公开(公告)日：1988-07-12
申请号：US946442
申请日：1986-12-23
摘要： A rock drilling bit comprises a steel body defining a cutting face with hard material inserts press-fitted into preformed openings in the cutting face. The inserts have ends extending outwardly of the cutting face which perform the actual drilling or cutting operation. The face surface of the body is case hardened except for narrow continuous bands about each insert opening. A method particularly suited for forming the case hardened cutting face is also disclosed.
摘要翻译： 岩石钻头包括限定切削面的钢体，硬质材料刀片压配合到切削面中的预成型开口中。 插入件具有从切割面向外延伸的端部，其执行实际的钻孔或切割操作。 除了围绕每个插入开口的窄连续带外，机体的表面被表面硬化。 还公开了一种特别适用于形成壳体硬化切割面的方法。
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公开(公告)号：US4568393A
公开(公告)日：1986-02-04
申请号：US678955
申请日：1984-12-06
CPC分类号： C23C26/00 , B23K35/308
摘要： A hard corrosion resistant surface is provided on a ferrous substrate by first overlay welding onto the substrate surface a chromium containing ferrous material. The deposited overlay can then be machined. It is thereafter subjected to a carburization treatment at a temperature and for a time sufficient to cause the overlay to become converted to an austenitic material containing iron chromium carbides. After cooling, the carburized overlay material is heated for a time and at a temperature sufficient to cause the austenitic matrix material to precipitate secondary carbides and convert to a martensite matrix material upon cooling. It is also contemplated to initiate the aforesaid treatment with a suitably selected chromium containing ferrous material that thereby is not overlay welded.
摘要翻译： 通过在基材表面上首先重叠焊接含铬铁材料，在铁基底上提供耐硬腐蚀表面。 然后可以加工沉积的覆盖层。 然后在足以使覆盖层变成含有铁铬碳化物的奥氏体材料的温度和时间进行渗碳处理。 在冷却之后，渗碳覆盖材料被加热一段时间并且在足以引起奥氏体基体材料沉淀二次碳化物并在冷却时转变成马氏体基体材料的温度。 还考虑用适当选择的含铬铁材料开始上述处理，由此不被重叠焊接。
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