US 4,357,864 AGranted

Pneumatic grain conveyance rice mill

OwnerFelipe Salete-Garcesinventor

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Abstract

A rice mill comprising grain feed means, grain husking means connected to said grain feed means, paddy removing means connected to said grain husking means, first grain elevating means connected to said paddy removing means, grain polishing and whitening means connected to said first grain elevating means, second grain elevating means connected to said polishing and whitening means, grain classifying means connected to said second grain elevating means, bin means connected to said grain classifying means, and pneumatic cyclonic separating means for removing light materials from said paddy removing means, said grain husking means, said polishing and whitening means, and said grain classifying means, is rendered capable of full pneumatic conveyance of the grain by the provision of first, second and third grain decelerating and abrading sifter means at the entrances of said grain husking means, said grain polishing and whitening means and said grain classifying means, respectively, and sieve means between each said first and third grain decelerating and abrading sifter means and said grain husking means and said grain classifying means, respectively, said first grain feed means and said first and second grain elevating means being pneumatic conveying means.

Claims13

Dependent claims

In a rice mill comprising grain feed means, grain husking means for husking grain delivered by said grain feed means, grain polishing and whitening means connected to a discharge of said grain husking means, and pneumatic cyclonic separator means for collecting husk, flour and bran released from the grain, the improvement comprising:

first pneumatic grain conveyor means for pneumatically conveying grain from said grain feed means to said grain husking means and from said grain husking means to said grain polishing and whitening means;
first grain decelerator and abrading pneumatic sifter means arranged to receive a discharge from said pneumatic grain conveyor means;
and
first vibrational sieve means arranged to receive grain from said grain decelerator and abrading pneumatic sifter means and to discharge screened grain to said husking means;
said first grain decelerator and abrading pneumatic sifter means comprising:
a housing having an inlet for air and entrained grain, an outlet for sifted grain, and suction duct means connected to said pneumatic cyclonic separator means for driving air through said housing;
adjustable plate means being disposed within said housing, said adjustable plate means being mounted at a level slightly below said inlet for air and entrained grain and being movable to narrow or broaden said inlet;
first curved abrasive lined plate means being disposed within said housing and arranged with a concave abrasive lined portion thereof facing said inlet past said adjustable plate means;
second curved abrasive lined plate means being disposed within said housing, said second curved plate means being arranged below said first curved plate means and having a curvature opposite that of said first curved plate means;
a plurality of third curved abrasive lined plate means arranged in a cascading array below said second curved plate means;
and
air separator means arranged at a bottom of said sifter means;
an arrangement of said first, second and third curved abrasive lined plate means being such that said grain slides thereon in a cascade type path and is swept by the air and therefore sifted thereby so that said grain is heavily abraded and decelerated as said grain moves down said cascading array of said first, second and third curved abrasive lined plate means which prevent said grain from impacting against any hard surface.

10 more elements

In a rice mill comprising grain feed means, grain husking means for husking grain delivered by said grain feed means, paddy separating means for separating a paddy from the husked grain and delivering it to said feed means, grain polishing and whitening means for receiving the grain from said paddy separating means, grain size classifying means, and pneumatic cyclonic separator means connected to a discharge of said grain polishing and whitening means for collecting husk, flour and bran released from the grains, the improvement comprising:

first pneumatic grain conveyor means;
first grain decelerator and abrading pneumatic sifter means arranged to receive a discharge from said first pneumatic grain conveyor means;
first vibrational sieve means arranged to receive grain from said first grain decelerator and abrading pneumatic sifter means and to discharge screened grain to said grain husking means;
second pneumatic grain conveyor means arranged to receive grain from said paddy separating means;
second grain decelerator and abrading pneumatic sifter means arranged to receive a discharge from said second pneumatic grain conveyor means and to discharge sifted grain to said grain polishing and whitening means;
third pneumatic grain conveyor means arranged to receive a discharge from said grain polishing and whitening means;
third grain decelerator and abrading pneumatic sifter means arranged to receive a discharge from said third pneumatic grain conveyor means;
and
second vibrational sieve means arranged to receive polished and whitened grain from said third grain decelerator and abrading pneumatic sifter means and to discharge screened polished and whitened grain to said grain size classifying means.

6 more elements

Dependencies are inferred from the claim text.