×

UPRIGHT VACUUM WITH REDUCED NOISE

  • US 20110265285A1
  • Filed: 04/30/2010
  • Published: 11/03/2011
  • Est. Priority Date: 04/30/2010
  • Status: Abandoned Application
First Claim
Patent Images

1. A method of reducing noise generated by a vacuum, the method comprising:

  • providing a vacuum comprising a motor including a motor shaft adapted to operate at a rotational speed of n;

    attaching a centripetal fan with t number of blades attached to the motor shaft;

    enclosing the fan between the motor and a motor housing end bracket disposed about the shaft, the motor housing end bracket defining an air input opposite an air output;

    wherein the variables of speed n and the number of blades t are selected so that a blade pass frequency (BPF) of the centripetal fan is greater than about 5000 Hertz, and the BPF is calculated as BPF=n*t/60.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×