Automatic flow rate control system

• US 3,344,805 A
• Filed: 03/24/1965
• Issued: 10/03/1967
• Est. Priority Date: 03/24/1965
• Status: Expired due to Term

• Current Assignee: Joseph S. Wapner
• Original Assignee: Joseph S. Wapner
• Inventors: Wapner, Joseph S.
• Application Number:
  US04/442,426
• Time in Patent Office: 923 Days
• US Class Current: 137/486
• CPC Class Codes: F16K 31/36 in which fluid from the circuit is constantly supplied to the fluid motor
• CPC Class Codes: G05D 16/028 Controlling a pressure difference control of flow G05D7/00
• CPC Class Codes: G05D 16/0655 using one spring-loaded membrane
• CPC Class Codes: Y10T 137/7759 Responsive to change in rate of fluid flow
• CPC Class Codes: Y10T 137/7788 Pressures across fixed choke

Claims

1. A FLOW RATE PROCESS CONTROL SYSTEM COMPRISING:

(A) A LOW TORQUE FLOW-RATE REGULATOR INTERPOSED BETWEEN A FLUID SOURCE AND A PROCESS TO CONTROL THE FLOW OF FLUID THERETO, SAID REGULATOR INCLUDING A METERING VALVE WHICH IS SETTABLE TO PROVIDE FOR A GIVEN LINE PRESSURE A DESIRED FLOW RATE AND A THROTTLE VALVE IMPOSING A COUNTER-PRESSURE ON THE METERING VALVE AND RESPONSIVE TO A DEVIATION IN PRESSURE FROM SAID GIVEN PRESSURE TO EFFECT A GROSS CORRECTION SUBSTANTIALLY MAINTAINING SAID DESIRED FLOW RATE, (B) MEANS TO MEASURE THE ACTUAL FLOW RATE OF FLUID PASSING THROUGH SAID PROCESS AND TO COMPARE IT WITH A REFERENCE VALUE TO PRODUCE AN ERROR SIGNAL DEPENDING ON THE EXTENT AND DIRECTION OF THE DEVIATION OF THE MEASURED VALUE FROM THE REFERENCE VALUE, AND (C) A MOTOR-OPERATOR OPERATIVELY COUPLED IN THE FLOATING MODE TO SAID METERING VALVE IN SAID REGULATOR AND RESPONSIVE TO SAID ERROR SIGNAL TO CAUSE THE FLOW RATE TO ASSUME A VALUE DETERMINED BY SAID REFERENCE VALUE.