Fluid flow measuring device

• US 3,307,396 A
• Filed: 02/28/1964
• Issued: 03/07/1967
• Est. Priority Date: 02/28/1964
• Status: Expired due to Term

• Current Assignee: Griffo, Joseph B.
• Original Assignee: Griffo, Joseph B.
• Inventors: Griffo, Joseph B.
• Application Number:
  US04/348,166
• Time in Patent Office: 1,103 Days
• US Class Current: 73/861.01
• CPC Class Codes: G01F 1/10 using rotating vanes with axial admission
• CPC Class Codes: G01F 1/115 with magnetic or electromagnetic coupling to the indicating device
• CPC Class Codes: G01F 1/90 with positive-displacement meter or turbine meter to determine the volume flow

Claims

3. APPARATUS FOR MEASURING THE MASS FLOW RATE OF LFUID THROUGH A CONDUIT COMPRISING AN ELONGATED HUB MEMBER, HELICAL VANE MEANS SECURED TO AND DISPOSED ABOUT THE PERIPHERAL SURFACE OF SAID HUB MEMBER, THE OUTER EDGES OF SAID VANE MEANS BEING SECURED TO THE INNER SURFACE OF SAID CONDUIT, WHEREBY SAID HUB MEMBER AND VANE MEANS ARE FIXED WITHIN SAID CONDUIT SUBSTANTIALLY AXIALLY THEREOF, ROTATABLE PADDLE MEANS INTERPOSED AT A FIRST POSITION ALONG SAID HUB MEMBER INTERMEDIATE SECTIONS OF SAID VANE MEANS MOUNTED COAXIALLY OF SAID CONDUIT SECTION AND RESPONSIVE TO THE ANGULAR FLUID FLOW TO PROVIDE A MEASUREMENT OF THE VELOCITY OF THE FLOW OF FLUID THROUGH SAID CONDUIT SECTION AND MEANS INTERPOSED AT A SECOND POSITION ALONG SAID HUB MEMBER INTERMEDIATE SECTIONS OF SAID VANE MEANS FOR MEASURING THE DIFFERENCE IN PRESSURE BETWEEN THE AXIS AND INNER WALL OF SAID CONDUIT, SAID PRESSURE DIFFERENCE BEING RELATED TO THE DENSITY OF THE FLUID FLOWING IN SAID CONDUIT SECTION, THE HELIX ANGLE OF THE SECTION OF SAID VANE MEANS UPSTREAM OF SAID PRESSURE DIFFERENCE MEASURING MEANS INCREASING FROM SUBSTANTIALLY PARALLEL TO THE AXIS OF THE CONDUIT TO A SUBSTANTIAL ANGLE WITH RESPECT THERETO AND THE HELIX ANGLE OF THE SECTION OF SAID VANE MEANS DOWNSTREAM OF SAID PRESSURE DIFFERENCE MEASURING MEANS DECREASING FROM A SUBSTANTIAL ANGLE TO THE AXIS OF THE CONDUIT TO SUBSTANTIALLY PARALLEL THERETO.