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    • 8. 发明授权
    • Overdrive signalling structure for fastener driving tool
    • 紧固件驱动工具的超速信号结构
    • US5480088A
    • 1996-01-02
    • US291706
    • 1994-08-16
    • Phillip M. BraunJohn J. HarrisonArthur E. PerraPatrick J. ScanlonDavid J. Simonelli
    • Phillip M. BraunJohn J. HarrisonArthur E. PerraPatrick J. ScanlonDavid J. Simonelli
    • B25C1/04
    • B25C1/047
    • A fastener driving tool is provided including a portable housing defining a fastener drive track, a fastener driving element carried by the housing for movement within the drive track through successive cycles of operation, each of which includes a fastener driving stroke and a return stoke, and a drive piston operatively connected with the fastener driving element for movement therewith. The tool also has a magazine assembly carried by the housing for receiving a supply of fasteners and feeding successive fasteners into the drive track in a position to be driven into a work piece during successive fastener driving strokes of the fastener driving element, an actuating structure carried by the housing and being constructed and arranged to move from a normal, inoperative position into an operative position to initiate the movement of the drive piston and the fastener driving element through a fastener driving stroke, and an overdrive signaling structure carried by the housing. The overdrive signalling structure includes an impulse responsive member constructed an arranged (1) to remain in a first position when the fastener driving tool is being operated at an acceptable power required to drive a fastener into the work piece and (2) to move from the first position thereof to a second position in response to an excessive impulse force resulting from a fastener driving stroke of the tool, thereby signaling the tool operator that the tool is being operated at a power in excess of the power requirements to drive a fastener into the work piece.
    • 提供了紧固件驱动工具,其包括限定紧固件驱动轨道的便携式壳体,由壳体承载的紧固件驱动元件,用于通过连续的操作循环在驱动轨道内移动,每个操作循环包括紧固件驱动行程和返回行程,以及 与所述紧固件驱动元件可操作地连接的驱动活塞用于与所述紧固件驱动元件一起运动。 该工具还具有由壳体承载的杂物组件,用于接收紧固件供应并将连续的紧固件供给到驱动轨道中,以在紧固件驱动元件的连续紧固件驱动冲程期间被驱动到工件中的位置,承载结构 并且被构造和布置成从正常的非操作位置移动到操作位置以启动驱动活塞和紧固件驱动元件通过紧固件驱动行程的移动,以及由壳体承载的过驱动信号结构。 过驱动信号结构包括一个脉冲响应构件,其构造成当紧固件驱动工具以可将所述紧固件驱动到所述工件中所需的可接受的功率运行时,所述第一位置保持在第一位置,并且(2) 第一位置响应于由工具的紧固件驱动行程产生的过大的冲击力而到达第二位置,从而向工具操作者发出指示,该工具以超过功率要求的功率运行,以将紧固件驱动到 工件