초록 ▼

A portable rechargeable battery-operated slender tubular blower for removing relatively light debris from hard surfaces such as sidewalks, driveways, decks or workbench surfaces. The blower uses an axial flow blower fan arranged for noise minimization and energy efficient operation. Blower tube inle

A portable rechargeable battery-operated slender tubular blower for removing relatively light debris from hard surfaces such as sidewalks, driveways, decks or workbench surfaces. The blower uses an axial flow blower fan arranged for noise minimization and energy efficient operation. Blower tube inlet and outlet portions are arranged for debris removal effectiveness by optimizing airflow volume and velocity parameters.

대표청구항 ▼

Portable blower apparatus comprising: an elongate tubular housing having an inlet end and an outlet end; a drive motor having a drive shaft extending substantially coaxially with the longitudinal axis of the housing; fan means coupled to the drive shaft for rotation about said longitudinal axis for

Portable blower apparatus comprising: an elongate tubular housing having an inlet end and an outlet end; a drive motor having a drive shaft extending substantially coaxially with the longitudinal axis of the housing; fan means coupled to the drive shaft for rotation about said longitudinal axis for moving air from the housing inlet end to the housing outlet end; and airflow directing and smoothing means positioned with respect to the drive motor and fan means to smooth the airflow passing over the drive motor and to maintain the airflow substantially parallel to said longitudinal axis; the fans means being positioned relative to the housing inlet such that standing waves within the housing having predominant noise frequencies generated by the fan means are inhibited.