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    • 7. 发明申请
    • PIPE CUTTER
    • 管道切割机
    • US20130097873A1
    • 2013-04-25
    • US13393131
    • 2009-08-28
    • Hua Tian LuoShui Ming LiZhong Qun LiuMichael NaughtonJohn S. Scott
    • Hua Tian LuoShui Ming LiZhong Qun LiuMichael NaughtonJohn S. Scott
    • B23D21/06B26B15/00
    • B23D21/06B23D17/02B23D21/00B26B15/00B26D3/16B26D5/00
    • A power tool that includes a pipe holder, a knife pivotally coupled to the pipe holder, and a drive mechanism coupled to at least one of the pipe holder and the knife. The power tool also includes a motor coupled to a drive mechanism, and a removable and rechargeable battery pack coupled to the motor to selectively provide power signals to the motor. The power tool also includes a controller configured to monitor a plurality of conditions of the power tool, such as battery pack voltage, battery pack temperature, operational current, and the like. The controller is also configured to detect one or more events related to the plurality of conditions of the power tool. For example, the controller is configured to monitor the operational current of the power tool. If the operational current of the power tool exceeds a first threshold value, a power signal duty cycle is reduced from a first duty cycle value to a second duty cycle value to limit the amount of torque the power tool is able to generate.
    • 一种电动工具,其包括管支架,可枢转地联接到管保持器的刀和联接到管支架和刀的至少一个的驱动机构。 电动工具还包括耦合到驱动机构的电动机,以及耦合到电动机的可移除和可充电电池组,以选择性地向电动机提供电力信号。 电动工具还包括被配置为监视电动工具的多个状态的控制器,例如电池组电压,电池组件温度,工作电流等。 控制器还被配置为检测与电动工具的多个条件相关的一个或多个事件。 例如,控制器被配置为监视电动工具的工作电流。 如果电动工具的工作电流超过第一阈值,则功率信号占空比从第一占空比值减小到第二占空比值,以限制电动工具能产生的转矩量。
    • 10. 发明申请
    • HAND SAW
    • 手锯
    • US20120324745A1
    • 2012-12-27
    • US13584513
    • 2012-08-13
    • John S. ScottMichael Naughton
    • John S. ScottMichael Naughton
    • B27B21/00
    • B23D51/01B23D51/10
    • A hand saw that includes a saw blade and a handle assembly having a clamp member movable between a clamped position and a released position. In the clamped position the clamp member exerts a clamping force on a top edge of the saw blade within a slot of the handle assembly to couple the saw blade to the handle assembly and to retain a tang of the saw blade within the slot. In the released position the tang is removable from the slot. A first interior wall and a second interior wall of the handle assembly that define the slot are flat such that the tang of the saw blade can be removed from the slot without moving the saw blade in a direction normal to a longitudinal axis of the saw blade when the clamp member is in the released position.
    • 一种手锯,其包括锯片和具有可在夹紧位置和释放位置之间移动的夹紧构件的手柄组件。 在夹紧位置,夹紧构件在手柄组件的狭槽内在锯片的顶部边缘上施加夹紧力,以将锯片联接到手柄组件并且将锯片的柄脚保持在狭槽内。 在释放位置,脚可从插槽中移除。 限定狭槽的手柄组件的第一内壁和第二内壁是平坦的,使得锯片的柄脚可以从狭槽移除,而不会沿着垂直于锯片的纵向轴线的方向移动锯片 当夹紧构件处于释放位置时。