Non-slip structure
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United States of America Patent
Stats
-
Jun 3, 2008
Grant Date -
Jun 24, 2004
app pub date -
Oct 16, 2002
filing date -
Oct 16, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a non-slip structure, which is highly efficient in preventing a slip with no trouble caused by a through hole, thereby enhancing reliability.The non-slip structure of this invention is characterized in that a portion of a metal plate such as a steel plate and the like is sheared so as to form cutting lines (a pair of lateral side cutting lines and a joining cutting line) for forming a protruded piece and, at the same time, the protruded piece is pulled up along the cutting lines to a height, which does not exceed the thickness portion of the steel plate so as to raise the shearing surface (edge), so that the sheared surface does not form a gap nor any through hole in contacting the steel plate.
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