Walter H Brock

US Patent:

50917161, Feb 25, 1992

Filed:

Jul 10, 1990

Appl. No.:

7/550695

Inventors:

Thomas E. Nelson - Durham NC
Walter S. Brock - Cary NC

Assignee:

EMCO Electronics - Cary NC

International Classification:

G08B 2100

US Classification:

340605

Abstract:

A method and apparatus for detecting leakage in a liquid transporting line using a line leak detector connected to the liquid line within a manway containing a pumphead of a submersible pump. The line leak detector contains a piston moving within a cylinder to detect changes in the liquid volume to determine a leak. The movement of the piston is converted to an electrical signal by a core, affixed to the piston, moving within a coil. Retrofit installation of the line leak detector in a fuel service station is facilitated by the use of the existing electrical power wiring between the pumphead and remote pump controller.