Dental model trimmer

Claim 1

A dental model trimmer comprising, in combination, a motoroperated grinding wheel, a housing bounding a grinding chamber about said grinding wheel, an access opening into said grinding chamber for positioning a grindable dental model in grinding relation to said grinding wheel, and a dust removal means located in depending relation to said grinding wheel in said grinding chamber, said means comprising a vacuum source inlet, an elongated porous structure cylindrical in shape and having a free end extending in a clearance position from about said vacuum source inlet in covering relation over said vacuum source inlet, a dust filtering material in the form of a bag and having an operative position fitted over the free end of said cylindrical porous structure, and an operable means arranged to cause the removal of any dust which collects on said filter bag, said operable means including a handle which is accessible externally of said grinding chamber to facilitate dust-removal operation thereof and having a ring-like body of an oversized extent relative to said cylindrical porous structure, said ring being operatively arranged to partake of scraping movement along said filter bag in its supported position over said cylindrical porous structure.