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    • 8. 发明授权
    • Pipe bursting and replacement apparatus and method
    • 管道爆破更换装置及方法
    • US4983071A
    • 1991-01-08
    • US524231
    • 1990-05-15
    • Allan T. FiskDavid I. FreedThomas A. Mann
    • Allan T. FiskDavid I. FreedThomas A. Mann
    • F16L55/18B23D21/02E21B7/20E21B7/30E21B29/00E21D9/06F16L1/024F16L55/165
    • E21B7/30E21B29/00E21B7/205F16L55/1658
    • Tool for slitting and laterally expanding underground steel gas mains and inserting replacement plastic piping into the spread apart pipeline has a forward end cylindrical portion mounting a single, rearwardly angled blade to make only one line of cut, and a conical pipe spreader portion at its rearward end. The conical spreader portion is eccentrically disposed with respect to the forward end cylindrical portion. A single roller type pipe slitter aligned with the fixed blade may be mounted on a removable extension of the forward end cylindrical portion, to initially groove and weaken the pipe along the intended line of cut. A pneumatically operated impact ram is attached to the rearward end of the tool, as is the leading end of the replacement piping. A wire cable pulls the tool through the underground pipe, thereby grooving, slitting and laterally expanding the pipe. The spacing of the roller slitter in advance of the fixed knife blade is dimensionally related to the length of any coupling or clamp as may be anticipated along the line of cut, and the spacing distance of the fixed knife blade forwardly of the conical spreader portion is related to the cone angle of the latter to increase hoop tension immediately in front of the fixed blade as the cutting proceeds.
    • 用于切割和横向扩展地下钢管燃气管道的工具并将更换的塑料管道插入扩展的管道中具有前端圆柱形部分,其安装单个向后倾斜的叶片以仅形成一条切割线,并且在其后方形成锥形管扩展部分 结束。 圆锥形吊具部分相对于前端圆柱形部分偏心地设置。 与固定刀片对准的单个辊式管道分切机可以安装在前端圆柱形部分的可移除的延伸部上,以沿着预定的切割线开始凹槽和减弱管道。 气动冲击冲头连接到工具的后端,替换管道的前端也是如此。 线缆通过地下管道拉动工具,从而开槽,切割和横向膨胀管道。 固定刀片之前的滚筒分切机的间距与沿着切割线所预期的任何联接器或夹具的长度尺寸上有关,并且固定刀片在锥形扩张器部分向前的间隔距离是 与后者的锥角相关,以在切割进行时立即增加固定刀片前方的箍紧力。
    • 9. 发明授权
    • Robot with spring pivot balancing mechanism
    • 机械手与弹簧枢轴平衡机构
    • US4753128A
    • 1988-06-28
    • US23691
    • 1987-03-09
    • Donald S. BartlettDavid I. FreedWilliam H. Poynter, Jr.
    • Donald S. BartlettDavid I. FreedWilliam H. Poynter, Jr.
    • B25J19/00B66C23/72F16F1/06
    • B25J19/0016Y10T16/84Y10T403/32704Y10T74/20
    • A robot including a balancing mechanism or balancer with a compression spring which flexes to compensate for the gravitational moment between an arm assembly and a base of the robot. The compression spring is chosen to have a force-deflection characteristic to account for the gravitational moment and the geometry of the mechanism. The arm assembly has a pivotal connection which pivotally supports the arm assembly on the base of the robot for movement about a pivotal axis. The mechanism can be adjusted for various arm assembly lengths and/or payloads. The mechanism includes a spring support, a connecting rod having a longitudinal axis and connected to the spring support for communicating motion of the spring support to the arm assembly at an attachment point offset from the pivotal axis. The resulting balancing mechanism is relatively compact, which lends itself to robotics applications where space is limited.
    • 包括具有压缩弹簧的平衡机构或平衡器的机器人,所述压缩弹簧弯曲以补偿臂组件和机器人的基座之间的重力矩。 选择压缩弹簧以具有力 - 偏转特性来解释重力矩和机构的几何形状。 臂组件具有枢转连接,其枢转地支撑臂组件在机器人的基部上围绕枢转轴线运动。 可以针对各种臂组件长度和/或有效载荷调整机构。 该机构包括弹簧支撑件,具有纵向轴线并连接到弹簧支撑件的连接杆,用于将弹簧支撑件以与枢转轴线偏置的附接点传递到臂组件。 所产生的平衡机构相对紧凑,这适用于空间有限的机器人应用。