Wood decking screw
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 4, 2017
Grant Date -
Aug 20, 2015
app pub date -
Oct 9, 2013
filing date -
Oct 9, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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