Fluid pressure system leak detector

• US 3,357,255 A
• Filed: 06/29/1965
• Issued: 12/12/1967
• Est. Priority Date: 06/29/1965
• Status: Expired due to Term

• Current Assignee: Reynolds, Blake
• Original Assignee: Reynolds, Blake
• Inventors: Reynolds, Blake
• Application Number:
  US04/467,930
• Time in Patent Office: 896 Days
• US Class Current: 73/716
• CPC Class Codes: G01L 13/025 using diaphragms
• CPC Class Codes: G01M 3/26 by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
• CPC Class Codes: Y10T 137/2409 With counter-balancing pressure feedback to the modulating device

Claims

1. IN A FLUID PRESSURE SYSTEM, A FLUID PRESSURE DIFFERENTIAL AMPLIFIED WHICH COMPRISES (A) A FIRST PRESSURE RESPONSIVE DIAPHRAGM, (B) MEANS FOR APPLYING A PRESSURE DIFFERENCE ACROSS SAID DIAPHRAGM, (B) A SECOND PRESSURE RESPONSIVE DIAPHRAGM OF SMALLER AREA THAN SAID FIRST PRESSURE RESPONSIVE DIAPHRAGM, (D) RIGID CONNECTING MEANS BETWEEN SAID PRESSURE RESPONSIVE DIAPHRAGMS, (E) A SOURCE OF FLUID UNDER PRESSURE, AND (F) MEANS FOR SUPPLYING SAID FLUID UNDER PRESSURE PREFERENTIALLY TO EITHER SIDE OF SAID SECOND PRESSURE RESPONSIVE DIAPHRAGM AND FOR RELEASING FLUID UNDER PRESSURE PREFERENTIALLY FROM THE OPPOSITE SIDE THEREOF IN RESPONSE TO MOVEMENT OF SAID DIAPHRAGMS TO COUNTERBALANCE AND NULLIFY RESPONSE BY SAID FIRST DIAPHRAGM TO SAID PRESSURE DIFFERENCE.