Patent ID: 8025669

Claim:
A portable microderm abrasion device comprising: a hollow housing, an electrically operated motor located within said housing, an air pump located within said housing and operated by said motor and having an air suction port and an air exhaust port, a hollow exfoliation grit supply cartridge removably located in said housing and having a grit discharge opening, said grit supply cartridge being removable from and replaceable in said housing, a hollow exfoliation waste collection cartridge separate from said grit supply cartridge and also located in said housing and being removable from and replaceable in said housing independently of said grit supply cartridge, wherein said waste collection cartridge has a grit supply coupling, an air intake port, a wand supply port, a wand return port, and an air discharge port, wherein said grit discharge opening of said grit supply cartridge resides in contact with said grit supply coupling, said grit supply cartridge emptying into said waste collection cartridge, a grit entrainment duct defined within said waste collection cartridge and leading from said air intake port and from said grit supply coupling and to said wand supply port, said grit entrainment duct being integrally molded with and formed entirely within said waste collection cartridge, said grit entrainment duct being pneumatically isolated from a waste discharge cavity within said waste collection cartridge, a movable wand terminating in a grit dispensing and retrieval tip remote from said housing, separate exfoliation grit supply and waste return tubes leading to said grit dispensing and retrieval tip, wherein said exfoliation grit supply tube is coupled between said grit dispensing and retrieval tip and said wand supply port, and said waste return tube is coupled between said grit dispensing and retrieval tip and said wand return port, a grit filter located in said waste collection cartridge and interposed between said wand return port and said air discharge port to exclude particulate matter from said air discharge port, and an air exhaust tube connected between said air discharge port and said air suction port.