Leak detection device

• US 5,315,291 A
• Filed: 12/23/1992
• Issued: 05/24/1994
• Est. Priority Date: 02/04/1992
• Status: Expired due to Fees

• Current Assignee: Mark A. Furr
• Original Assignee: Mark A. Furr
• Inventors: Furr, Mark A.
• Primary Examiner(s): Hofsass, Jeffery A.
• Application Number:
  US07/996,098
• Time in Patent Office: 517 Days
• Field of Search: 340/604, 340/605, 340/618, 340/620, 200/61.04, 200/61.05, 73/40
• US Class Current: 340/605
• CPC Class Codes: G01M 3/16 using electric detection means G01M3/045, G01M3/06, G01M3/12, G01M3/20, G01M3/24, G01M3/26 take precedence
• CPC Class Codes: G01M 3/188 for radiators
• CPC Class Codes: G08B 21/20 responsive to moisture

Abstract

A leak detection device for preventing damage from leaking hot water tanks. The invention features a unique three layered sensor that completely encircles the hot water tank thus detecting the occurrence of leaks any where around the tank. Circuitry controls the sensor that provides for accurate detection of even small amounts of moisture so that any potential leak problems can be remedied before a major spill occurs. The device is powered by connecting it to 110 house current. A 9 volt battery is provided for battery operation of the device and is also provided a back-up in case of power failures.

Claims

1. A leak detection device for a liquid container comprising:

a three layer sensor, having two detachable ring halves, dimensioned to encircle said liquid container, said sensor having a first layer, closest to said container, flexible and conductive, having a resistance ranging from 0 to 2 megohms, said sensor having a second layer, furthest from said container, flexible and conductive, having a resistance ranging from 0 to 2 megohms, and said sensor having a third layer, sandwiched between said first and second layers, said third layer nonconductive, wherein a leak in said container will cause the sensor to produce a signal corresponding to said leak by completing an electrical circuit through said first and second layers; and

wherein said sensor further comprises flexible and conductive strips with looped terminations, said looped terminations physically support said sensor and substantially conform to the contour of the surface said sensor rests on.

2. The leak detection device of claim 1 further comprises:

warning means for announcing that said container has developed a leak;

control means for processing the signal produced by said sensor to activate said warning means.

3. The leak detection device of claim 2 wherein said warning means further comprises a piezo buzzer, wired to said control means, wherein said leak in said container, causes said buzzer to be activated producing an audible warning of at least 95 decibels.

4. The leak detection device of claim 3 wherein said warning means further comprises telephone dialing means, connected to said control means, for automatically dialing a pre-selected telephone number in response to the detection of a leak by said sensor.

5. The leak detection device of claim 4 wherein said warning means further comprises a flashing light.

6. The leak detection device of claim 5 wherein said control means further comprises:

a power source indicator which indicates when battery power has replaced line current as the power source;

a low battery indication which indicates that the battery should be replaced; and

a test operation mode which simulates a leak in said container to test the operation of said leak detection device.