Self-actuating molds for vertically casting concrete pipe
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United States of America Patent
Stats
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Feb 3, 1998
Grant Date -
N/A
app pub date -
May 5, 1995
filing date -
May 5, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gated mold for casting concrete pipe requires no wedges or bolts for securement. A core mold may be contracted by lifting at an actuation point, and expanded by resting on a base ring. An external mold may be expanded by lifting at an actuation point, and contracted by resting on a base ring. The mold gates are opened and closed with sets of collapsing links pivotably attached to a longitudinally extending actuation column. Longitudinal motion of the actuation column forces the links to collapse or extend, thereby expanding or contracting the mold. Appropriately positioned actuation and lifting points are provided such that the mold can be lifted vertically along the longitudinal axis containing the mold center of gravity.
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