Molding a leaching chamber sidewall
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United States of America Patent
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Dec 15, 2009
Grant Date -
Apr 13, 2006
app pub date -
Nov 29, 2005
filing date -
Oct 1, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An arch shape cross section thermoplastic leaching chamber, having sidewall slot perforations which flare inwardly, is made using a mold comprised of a mold cavity part and an inwardly retractable mold core part. The core part has opposing side slides with projections that define the perforations; they are separated by a center block. The center block moves downwardly and the slides move inwardly, under action of slide rods built into the mold core, to enable a molded chamber to be removed from the mold.
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