Fan for regenerative air vacuum street sweeper, and method of fan manufacture and assembly
AssigneeCurbtender Sweepers LLC
InventorsAditya G. Anand, Clayton D. Wright, Aaron T. Baughman
Life of this patent
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Abstract
A fan with airfoil blades is provided for a regenerative air vacuum street sweeper. The blades are formed using cut and pressed upper and lower panels which are welded at a forward edge to a rod to form the airfoil leading edge and welded at the rear edges to form the airfoil trailing edge. Pins extend laterally outwardly from the rod for mounting each blade in corresponding holes in the front and rear plates of the fan housing. The side edges of the blade are welded to the plates at a 9-11° angle of attack. The airfoil blades allow for reduced size, horse power, noise, and manufacturing and shipping costs.
Claims20
A street sweeper fan, comprising:
- a housing;
- a plurality of blades fixed inside the housing, each blade having a leading edge, a trailing edge, an upper surface, a lower surface, and opposite lateral sides;
- each blade having pins extending laterally outwardly from the opposite lateral sides;
- and
- the blades each having a non-symmetrical airfoil profile.
A street sweeper fan, comprising:
- a housing;
- a plurality of blades fixed inside the housing, each blade having a leading edge, a trailing edge, an upper surface, a lower surface, and opposite lateral sides;
- the leading edge of each blade having a rod extending between the opposite lateral sides;
- and
- the blades each having a non-symmetrical airfoil profile.
A street sweeper fan, comprising:
- a housing;
- a plurality of blades fixed inside the housing, each blade having a leading edge, a trailing edge, an upper surface, a lower surface, and opposite lateral sides;
- each blade having upper and lower panels, the upper and lower panels having forward edges secured to one another, and the upper and lower panels having rearward edges secured to one another;
- a rod attached to the forward edges of the upper and lower panels;
- and
- the blades each having a non-symmetrical airfoil profile.
Dependencies are inferred from the claim text.