Endre G Zsigmond

US Patent:

20060260683, Nov 23, 2006

Filed:

May 18, 2005

Appl. No.:

11/131526

Inventors:

Endre Zsigmond - Albuquerque NM, US

International Classification:

F16T 1/00

US Classification:

137172000

Abstract:

A method and apparatus for preventing a dense liquid such as diesel fuel from being dispensed into a storage tank that contains a less dense liquid, such as gasoline fuel and vice versa. The unloading process happens by gravity through a vertical down hole. The invention uses the gravitational flow of the fluid, a movable float that is moved by contact with a fluid of a predetermined density, and a magnetic member to activate the stopping feature.