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Variable high/low vacuum/blower device

  • US 5,243,733 A
  • Filed: 09/08/1992
  • Issued: 09/14/1993
  • Est. Priority Date: 09/08/1992
  • Status: Expired due to Term
First Claim
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1. A vacuum/blower device comprising:

  • a housing having air flow channels, said channels having and entry end and an exit areaair inlet means for air intake and air outlet means for air exhaust both of which extend through said housing and are connected to said air flow channels;

    motor driven upper and lower blower wheels mounted in said housing relative to said air flow channels for creating air flow-through said air flow channels from the air inlet means to the air outlet means;

    said lower blower wheel being located at an entry area of said air flow channels for receiving intake air from said air inlet means;

    first valve means operable between first and second positions for selectively changing the air flow in said air flow channels;

    said first valve means when operable in a first position directing the flow of exhausted air from said lower blower wheel to said upper blower wheel for high pressure/low air flow operation;

    said first valve means when operable in a second position enabling intake air from the air inlet means to be directed to said upper blower wheel in addition to air intake by said lower blower wheel at the entry end of said air flow channels for low pressure/high air flow operation; and

    second valve means at an exit area of said air flow channels and being operable between first and second positions for selectively changing the air flow-through said air inlet means and air outlet means to provide either a vacuum or blower device.

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