Combined concrete feed and packerhead lift control
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United States of America Patent
Stats
-
Jan 27, 1987
Issued Date -
N/A
app pub date -
Jan 27, 1986
filing date -
Jun 11, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for making concrete pipe having substantially uniform density throughout the length of the pipe has a packerhead which is rotated and lifted within a mold, and a conveyor for feeding concrete into the mold. A combined conveyor speed and packerhead lift control operates in response to the amount of power used to rotate the packerhead to slow the speed of the conveyor to a desired speed and change the lift speed of the packerhead when the load on the motor for rotating the packerhead exceeds a selected upper load limit or falls below a selected lower load limit.
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Cited Art Landscape
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