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Portable differential pressure generator

  • US 7,111,491 B2
  • Filed: 02/24/2005
  • Issued: 09/26/2006
  • Est. Priority Date: 09/08/2001
  • Status: Expired due to Fees
First Claim
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1. A portable pressure differential generating system comprising:

  • a portable flow accelerator having a passage therethrough, said passage having a high pressure region with a first cross sectional area and a low pressure region with a second cross sectional area, the first cross sectional area being larger than the second cross sectional area, said accelerator further including;

    an accelerator low pressure tap in fluid connection with the low pressure region of the flow accelerator, said low pressure tap adapted for fluid connection with a low pressure port of a pressure measuring device;

    an accelerator high pressure tap in fluid connection with the high pressure region of the flow accelerator;

    said high pressure tap adapted for fluid connection with a high pressure port of a pressure measuring device;

    a portable pump in fluid connection with the passage in the flow accelerator; and

    a valve disposed between and in fluid communication with the flow accelerator and the pump, the valve having an upstream side and a downstream side defined by the direction of fluid flow through the valve;

    a valve low pressure tap in fluid connection with the downstream side of the valve; and

    a valve high pressure tap in fluid connection with the upstream side of the valve;

    a range selection device for selecting either a first pressure differential across the accelerator low pressure tap and the accelerator high pressure tap or a second pressure differential across the valve through the valve low pressure tap and the valve high pressure tap.

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