Breakaway couplings for transportation structures
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United States of America Patent
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May 20, 2014
Grant Date -
May 12, 2011
app pub date -
Nov 2, 2010
filing date -
Nov 3, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A breakaway coupling for joining a generally vertical pole structure to a supporting foundation is provided. The breakaway coupling is provided with a multi-sided, elongated body, which may be square-shaped, hexagonal, or generally polygonal in shape. The multi-sided, elongated body is provided with an upper end and a lower end, an outer surface, and is machined to have an internally threaded bore that extends between the upper end and the lower end of the multi-sided, elongated body. The outer surface of the multi-sided, elongated body of the breakaway coupling is provided with at least one horizontally disposed, circumferential groove extending partially into the multi-sided, elongated body toward the internally threaded bore and also extending to a critical notch depth.
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