Variable diameter, variable pitch auger with material scraper and breaker bar
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United States of America Patent
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May 5, 2015
Grant Date -
May 17, 2012
app pub date -
Sep 22, 2011
filing date -
Sep 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A multi stage auger system having a hopper with a first diameter opening tapering to a second smaller diameter opening, coupled to an auger tube at the second smaller diameter opening. An auger entry spiral with generally helical shape and a sweep arm coupled thereto, the spiral and the sweep arm skimming inside the product hopper to entrain the semi-solid materials from the hopper wall and, through the shape of the spiral, moving materials through the hopper from the first opening towards the second smaller opening. During this entrainment and movement by the spiral and sweep arm a space is left between the spiral and the sweep arm to remove air and voids from the semi-solid material through the movement. The auger has a first coarse pitch providing further removal of air/void spaces and a second finer pitch providing further movement under higher pressures near an exit of the auger.
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