Line leak test apparatus responsive to pump use

Details Line leak test apparatus responsive to pump use Line leak test apparatus responsive to pump use

1992-02-18

1994-07-26

Teska, Kevin J.

Boots, shoes, and leggings

73 405R, 222 63, 364510, 36455101, G06F 1520, G01M 332

Patent

active

053331150

ABSTRACT:
A line leak test probe for use in a liquid storage and dispensing system which includes a pump. A pressure transducer provides a pressure signal to a microprocessor-based test circuit. Various conditions descriptive of the pressure versus time curve while the pump is running, such as the pressure will rise above 20 psi when the pump is turned on, drop when the liquid is dispensed, and rise again when the dispenser is turned off, are stored within a software program in the microprocessor memory. The microprocessor calculates an average pressure to average out noise and artifacts in the pressure, and waits for the pressure to drop 2 psi below the average pressure after the pump has been turned off before performing leak tests in order to give the noise and artifacts time to die down.

REFERENCES:
patent: 4490800 (1984-12-01), Powers
patent: 4658986 (1987-04-01), Freed et al.
patent: 4686638 (1987-08-01), Furuse
patent: 4796466 (1989-01-01), Farmer
patent: 4835717 (1989-05-01), Michel et al.
patent: 4852054 (1989-07-01), Mastandrea
patent: 4979641 (1990-12-01), Turner

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