×

Centrifugal blower improved to reduce vibration and noise

  • US 5,601,400 A
  • Filed: 09/15/1995
  • Issued: 02/11/1997
  • Est. Priority Date: 09/16/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A centrifugal blower comprising:

  • a casing having a top wall which has a spiral periphery, a bottom wall which has a spiral periphery, a side wall spirally extending along the periphery of the bottom wall, the side wall being connected to the bottom wall, and an intermediate wall spirally extending along the periphery of the top wall, the intermediate wall connecting the top and side walls and the intermediate wall substantially forming an L shape which has a substantially vertical wall connected to the top wall, and a substantially horizontal wall connected to the vertical wall and to the side wall;

    a centrifugal fan rotationally provided within the casing, the centrifugal fan having a bottom plate and a plurality of blades separated along the periphery of the bottom plate, the plurality of blades extending substantially parallel to the rotational axis; and

    the casing providing a spiral duct for the air flow, the duct having a substantially rectangular section, perpendicular to the flow direction, which has a cut out portion at the radially outer top corner by the intermediate wall.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×