초록 ▼

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

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.

대표청구항 ▼

A hand-held leaf blower-vacuum apparatus for shredding debris comprising: a motor mounted on a housing having an air inlet opening and an air outlet opening, the motor having a drive shaft passing through an opening in the housing; a handle connected to the housing for carrying and operating the app

A hand-held leaf blower-vacuum apparatus for shredding debris comprising: a motor mounted on a housing having an air inlet opening and an air outlet opening, the motor having a drive shaft passing through an opening in the housing; a handle connected to the housing for carrying and operating the apparatus in an elevated position; a centrifugal impeller mounted to the drive shaft and disposed within the housing proximate the air inlet opening comprising: a central hub for mounting the impeller to the drive shaft; and a plurality of vanes coupled to the central hub for creating a flow of air toward the hub and then radially outward through the vanes, each of the plurality of vanes having an inside leading edge adjacent the hub, at least one of the inside leading edges having at least one sharply defined point for contacting lawn debris entrained in the flow of air approaching the impeller for breaking apart or tearing the lawn debris.