Abstract: A deduster is comprised of two sets (pairs) of counter-rotating dedusting brushes in cooperation with a vacuum system for saw dust removal from wooden lumber. In addition to these features, the deduster may feature a separate, movable, top brush assembly that can be easily adjusted for different board thicknesses and raised up to allow for clearing board jams and for pass-through if boards were to be run without dedusting. This deduster apparatus is modular, thereby allowing it to be positioned over an existing machine or a lumber board unscrambler machine such as a lugged unscrambler machine. There is also a deduster for a board handling hopper.

Abstract: A grease extractor apparatus having a housing, a hood, a first chamber connecting with air and grease vapors entrained by said hood, a cold water spray nozzle system and a hot water wash system associated with said chamber, a sump at the bottom of said chamber for collecting solidified grease vapors, a second chamber connecting with said first chamber and having additional wash nozzles incorporated therewith, a third chamber for having turbulent flow therein and connected with said second chamber, a duct leading from the third chamber to an expansion chamber the expansion chamber having an airflow baffle and third wash nozzles incorporated therewith, and an exhaust duct from the expansion chamber connected to a suction fan and a fire damper means therein.