Design placed in the Public Domain
by Allen Dong and Roger Edberg
P.O. Box 413, Veneta OR 97487
Figure 1 - Small electric winnower with metal stand.
The winnower separates seeds
from chaffs by blowing the less dense chaff away from the seeds as the
seeds fall down a column of air. The seed and chaff mixture is placed in
the winnower inlet (A).
Seeds and denser material
drop down the air column (C, D and E) and exit at the bottom (E). The less
dense material drops down to the air column at "C" and is blown out
through the top (C).
The blower (G) pushes air in
at (F) and out through the top (C). The airflow is regulated with a baffle
that partially block the air intake on the blower ("G" - Dayton
4C443). Alternatively, use a DC motor (e.g. Dayton 2C646) and a variable
DC power supply to adjust the blower motor speed.