Abstract: A centrifugal impeller for a hand-held leaf blower-vacuum apparatus includes a central hub for mounting to the drive shaft of the leaf blower-vacuum motor and a plurality of serrated vanes for shredding drawn-in lawn debris and ejecting the shredded debris from the leaf blower-vacuum apparatus. The serrated vanes have a plurality of sharp corners on the leading edges of the vanes on which the drawn-in debris is incident. The sharp corners reduce the debris more rapidly and to a smaller size, thereby preventing the jamming of the impeller by an overload of debris.

Abstract: A convertible leaf blower and vacuum apparatus includes a fan and baffle supported on one end of a cylindrical member for insertion into a collar defining an air inlet of the fan for narrowing the diameter of the air inlet when the apparatus is being connected to the collar. A vacuum tube replaces the cylindrical member when the apparatus is in a vacuum. The vacuum tube is connected to the collar in the same manner as the cylindrical member. A cover for overlaying the air inlet is attached on one side to the fan housing by a hinge and the other side by a releasable fastener.