Railroad crossing signal foundation and spider and method of producing the same
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United States of America Patent
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May 5, 1998
Issued Date -
N/A
app pub date -
Jan 13, 1997
filing date -
Jul 10, 1995
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A spider for a railroad crossing signal foundation has plastic lined tubular channels extending through it with conical entry sections. In assembling a foundation, upright guide rods are guided into the channels by the entry sections without dislodging the plastic liners. In producing the spider, concrete is poured into a mold about tubular plastic liners so as to form entry sections and channels and to fix the plastic liners in the concrete to line the channels.
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Cited Art Landscape
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