Funnel and automatic supply system for liquid nitrogen

Details Funnel and automatic supply system for liquid nitrogen Funnel and automatic supply system for liquid nitrogen

1995-03-28

1996-04-16

Recla, Henry J.

Fluent material handling, with receiver or receiver coacting mea

Automatic control of flow cutoff or diversion

Level or overflow responsive

141331, 141339, 141 82, B65B 130, B65B 328

Patent

active

055073271

ABSTRACT:
A hollow-walled cylindrical stainless steel vacuum-insulated funnel with a flat bottom through which a float valve and screen check and filter the gravity flow of liquid nitrogen out through a drain pipe in the bottom. The bottom of the funnel has a small lip raised all around the small pipe outlet to prevent any water condensation inside the funnel from dripping into the EDX dewar. The pipe outlet pierces a dewar stopper and can be permanently left in place on top of a dewar. The hollow-walls of the funnel are packed with foil-backed film in laminations to reduce radiation heat transfer between the funnel's inside and outside walls. A vacuum is drawn inside the hollow walls to minimize heat conduction.

REFERENCES:
patent: 1402835 (1922-01-01), Bywater et al.
patent: 3207372 (1965-09-01), Evans
patent: 4407340 (1983-10-01), Jenson et al.
patent: 4905743 (1990-03-01), Gray

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