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    • 5. 发明公开
    • WOOD DECKING SCREW
    • 木头甲板螺丝
    • EP2906838A1
    • 2015-08-19
    • EP13844975.6
    • 2013-10-09
    • Handy & Harman
    • PIECIAK, Joseph, A.BELINDA, Richard, L.MAZIARZ, Michael, W.WEISS, Tad, A.
    • F16B35/06
    • F16B25/0042F16B25/0015F16B25/0057F16B25/0063F16B25/0073F16B35/065
    • A screw for securing dense wood material has a head with a specially configured drive socket and an underside with an array of lobes. The lobes preferably have a left-handed orientation and have chamfered extremities. The shank is specially configured with an upper thread, an intermediate unthreaded portion and a lower thread which terminates with a half-point tip. In one embodiment, the upper thread major diameter is slightly smaller than the major diameter of the lower thread. The upper thread has a greater thread density than the lower thread. The upper to lower thread-per-inch density is preferably in the range of 1.3:1 to 1.7:1. The screw is specifically configured to assist in applications where there are wet fibers near the wood deck surface.
    • 用于固定致密木质材料的螺钉具有带特殊配置的驱动器插座的头部和带有一系列凸角的下侧。 叶片优选具有左手定向并具有倒角末端。 该柄部特别配置有上部螺纹,中间无螺纹部分和以半点尖端终止的下部螺纹。 在一个实施例中,面线主要直径略小于底线的主要直径。 面线比底线具有更大的线密度。 每英寸上线密度至下线线密度优选在1.3:1至1.7:1的范围内。 螺杆专门配置用于辅助木质甲板表面附近有湿纤维的场合。