Pumping system and leak detection unit control therefor

• US 3,273,753 A
• Filed: 03/25/1965
• Issued: 09/20/1966
• Est. Priority Date: 03/25/1965
• Status: Expired due to Term

• Current Assignee: Geosource Incorporated Houston TX
• Original Assignee: Irving A. Johnson, Stephen Stasenko
• Inventors: Johnson, Irving A., STEPHEN STASENKO
• Application Number:
  US04/442,593
• Time in Patent Office: 544 Days
• US Class Current: 222/52
• CPC Class Codes: B67D 7/3209 relating to spillage or leakage, e.g. spill containments, leak detection leak detectors for underground fuel dispensing systems G01M3/2892
• CPC Class Codes: F16L 2101/30 Inspecting, measuring or testing

Claims

1. IN A PUMPING SYSTEM HAVING A PRESSURIZED DISCHARGE LINE AND AN ELECTRICAL CONTROL CIRCUIT FOR ACTUATING A PUMPING MEANS TO DISCHARGE FLUID THROUGH THE LINE, A VOLUME SENSITIVE LEAK DETECTOR COMPRISING, A CHAMBER CONNECTED TO THE PRESSURIZED LINE AND HAVING A MEMBER MOVABLY MOUNTED TO RESPOND TO THE VOLUME OF FLUID THEREIN AND HAVING MEANS URGING SAID MEMBER AGAINST THE FORCE OF THE LINE PRESSURE, AND A CONTROL MEANS HAVING A CIRCUIT ENABLING MEANS ADAPTED TO BE CONNECTED IN THE CONTROL CIRCUIT AND OPERABLY ASSOCIATED WITH SAID MEMBER TO DISPOSE THE ENABLING MEANS IN THE ENABLING POSITION WITH A SELECTED AMOUNT OF FLUID WITHIN THE CHAMBER AND TO DISPOSE THE ENABLING MEANS TO A DISABLING POSITION IN RESPONSE TO SELECTED VOLUMETRIC REDUCTION AS A RESULT OF FLUID DISCHARGED FROM SAID CHAMBER WHEREBY SAID CONTROL MEANS IS INSENSITIVE TO PRESSURE CHANGES AND SENSITIVE TO VOLUMETRIC CHANGES TO CONTROL THE PUMPING MEANS.