Stacked tools for overthrow sweeping

A surface cleaning machine comprising;

• a mobile frame;
• a debris hopper carried upon the surface by the frame;
• a cylindrical sweeping brush carried by the frame, said sweeping brush rotating in a direction to throw debris from a surface being swept toward the debris hopper;
• a cylindrical conveying brush carried by the frame for rotation about an axis that is parallel to the sweeping brush, said conveying brush being positioned above said sweeping brush and being located relative thereto to convey debris moved upwardly by the sweeping brush in an upward direction toward the debris hopper;
• and
• a scroll carried by the frame forwardly of the sweeping brush and conveying brush, said scroll to direct the flow of debris from said brushes to said debris hopper, both of said sweeping brush and said conveying brush being selectively movable toward said scroll to accommodate wear of the brushes.

A surface cleaning machine comprising:

• a mobile frame;
• a debris hopper carried by the frame;
• a cylindrical sweeping brush carried on the fame, said sweeping brush rotating in a direction to throw debris from a surface being swept toward the debris hopper;
• a cylindrical conveying brush carried on the frame for rotation about an axis that is parallel to the sweeping brush, said conveying brush being positioned above said sweeping brush and being located relative thereto to convey debris moved upwardly by the sweeping brush in an upward direction toward the debris hopper;
• a scroll carried on the frame forwardly of the sweeping brush and conveying brush, said scroll to direct the flow of debris from said brushes to said debris hopper, said sweeping brush being mounted on the frame for movement toward said scroll to accommodate wear of the sweeping brush;
• and
• a rear wall carried on said-frame behind both said sweeping brush and said conveying brush, said rear wall including a re-circulation flap positioned at the lower end of said rear wall and generally adjacent a rear surface of said sweeping brush, which rear wall, together with said scroll, forms a sweeping compartment.