Dust collection systems and attachments for circular saws

A worm-drive circular saw comprising:

• an arbor mount for receiving a circular saw blade;
• a motor mounted at least substantially perpendicular to the arbor;
• a fixed blade guard having an arcuate profile with opposing first and second ends and a side surface extending at least substantially perpendicularly with respect to the arcuate profile on the same side of the circular saw blade as the motor along a longitudinal axis of the fixed blade guard between the opposing first and second ends, the fixed blade guard defining an exhaust port for removing debris drawn into the fixed blade guard, the exhaust port extending through the side of the fixed blade guard on the same side of the circular saw blade as the motor and into fluid communication with a cavity defined by the fixed blade guard, the cavity extending between the opposing first and second ends and along the longitudinal axis of the fixed blade guard, the cavity formed by a protrusion of the arcuate profile away from the arbor mount and the circular saw blade, the cavity having an expanded interior volume extending from and adjacent to the exhaust port;
• and
• a channel in fluid communication with the expanded interior volume of the cavity through the exhaust port, the channel extending from the side surface at least substantially perpendicular to the longitudinal axis of the fixed blade guard, the channel defined by a connection extending at least substantially parallel to the arbor on the same side of the circular saw blade as the motor, the connection configured for connecting to a vacuum source for pulling debris from within the fixed blade guard into the cavity and through the exhaust port and the channel toward the vacuum source.

A worm-drive circular saw comprising:

• an arbor mount for receiving a circular saw blade;
• a motor mounted at least substantially perpendicular to the arbor;
• a fixed blade guard having an arcuate profile with opposing first and second ends and a side surface extending at least substantially perpendicularly with respect to the arcuate profile on the same side of the circular saw blade as the motor along a longitudinal axis of the fixed blade guard between the opposing first and second ends, the fixed blade guard defining an exhaust port for removing debris drawn into the fixed blade guard, the exhaust port extending through the side of the fixed blade guard on the same side of the circular saw blade as the motor and into fluid communication with a cavity defined by the fixed blade guard, the cavity extending between the opposing first and second ends and along the longitudinal axis of the fixed blade guard, the cavity formed by a protrusion of the arcuate profile away from the arbor mount and the circular saw blade, the cavity having an expanded interior volume extending from and adjacent to the exhaust port;
• a channel in fluid communication with the expanded interior volume of the cavity through the exhaust port, the channel extending from the side surface at least substantially perpendicular to the longitudinal axis of the fixed blade guard, the channel defined by a connection extending at least substantially parallel to the arbor on the same side of the circular saw blade as the motor, the connection configured for connecting to a vacuum source for pulling debris from within the fixed blade guard into the cavity and through the exhaust port and the channel toward the vacuum source;
• and
• a divider disposed within the fixed blade guard and extending from proximate to the exhaust port in a direction away from the exhaust port to enhance the pulling of the debris from within the fixed blade guard into the cavity.