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Low-noise blower

  • US 9,541,098 B2
  • Filed: 06/28/2013
  • Issued: 01/10/2017
  • Est. Priority Date: 06/28/2013
  • Status: Active Grant
First Claim
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1. A blower comprising:

  • an impeller comprising;

    an impeller plate; and

    a plurality of blades each attached to the impeller plate and comprising a tip and a leading surface that comprises a first portion proximate to the tip, the first portion having a first radius; and

    a housing comprising;

    an impeller cavity, wherein the impeller plate is disposed within the impeller cavity;

    a collector; and

    a slot between the impeller cavity and the collector, the slot having an upper edge and a lower edge each comprising a second radius, wherein the upper and lower edges of the slot each comprise a respective inclined surface extending from the respective edge toward the collector and an inside rounded corner nearest the impeller, the inclined surfaces disposed relative to each other at an angle within a range of 10-40 degrees such that a distance between the inclined surfaces increases as the inclined surfaces extend away from the impeller.

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