Patent ID: 6205814
Filing Date: 2001-03-27
Classification: F24S,F25J,Y02E

Abstract:
Apparatus for producing nitrogen, comprising:a first reservoir fully-enclosed and substantially filled with liquid mercury;a cylinder and a piston operably installed therein to compress ambient air to pressurized air, said cylinder having a first valve system for passing said ambient air therethrough during a suction stroke of said piston and a second valve system for passing said pressurized air therethrough during a compression stroke of said piston;a second reservoir fully-enclosed and substantially filled with a substantially incompressible fluid;means, between said first and second reservoirs, for separating and maintaining said liquid mercury and said incompressible fluid at a same pressure;fluid-containing means for connecting said second reservoir and said piston, said incompressible fluid flowing between said second reservoir and said fluid-containing means to move said piston in said compression and said suction strokes;means for heating and cooling said mercury; anda use device in fluid communication with said second valve system, said use device producing at least liquid nitrogen from said pressurized air.