Dust extraction unit

A dust extraction unit comprising:

• a first and a second air filter removable and mountable within the dust extraction unit;
• a body defining an air flow path operable to receive the first and the second air filter, the air flow path passing through the body and through the first and the second air filters when the first and the second air filters are mounted within the body and exiting the dust extraction unit;
• the body of the dust extraction unit characterized by:
• a first portion operable to receive the first air filter therein, wherein the first portion comprises a first wall forming an external surface of the first portion;
• and
• a second portion operable to receive the second air filter therein, wherein the second portion comprises a second wall forming an external surface of the second portion, and an inner surface defining an interior cavity of the second portion operable to receive the second air filter, wherein the inner surface includes one or more channels extending in line with the air flow path,
• wherein the first wall of the first portion and the second wall of the second portion are connected by a hinge,
• wherein the hinge transitions the body of the dust extraction unit between a first configuration and a second configuration,
• wherein in the first configuration, the first portion and the second portion define the air flow path through the dust extraction unit, and wherein in the second configuration, the first wall of the first portion is disposed on the second wall of the second portion to provide access to the interior cavity of the second portion operable to receive the second air filter, and
• wherein the second air filter is releasably clamped within the body of the dust extraction unit by a clamping mechanism including a frame having a compressible gusset, and wherein the frame includes one or more lugs extending from a periphery of the frame, wherein each of the one or more channels is configured to receive a lug of the one or more lugs for mounting the frame to the second portion, the clamping of the second air filter being such to form an air tight seal between the second air filter and the body of dust extraction unit in the first configuration.