The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1993
Filed:
Feb. 18, 1992
Robert E Cieslukowski, New Prague, MN (US);
Minnesota Valley Engineering, Inc., New Prague, MN (US);
Abstract
A vacuum insulated storage vessel holds a quantity of LNG for delivery to a pressure building tank. The pressure building tank maintains a natural gas head over the LNG. The pressure in the pressure building tank is lowered using liquid nitrogen (LN.sub.2) to condense the natural gas head and is raised by vaporizing the LNG. A valve system connects the supply of LNG in the pressure building tank to the fuel tank of the vehicle being supplied to allow either LNG or natural gas to be delivered to the vehicle tank and allows natural gas in the tank to be vented back to the fueling station. The fueling station of the invention includes suitable controls for controlling the pressure and temperature of the LNG delivered to the vehicle, the pressure and temperature in the fueling station itself and the pressure and temperature in the vehicle fuel tank.