| Patent Number |
Title Of Patent |
Date Issued |
| 7600541 |
Overfill protection for liquid hydrogen tank |
October 13, 2009 |
| A fluid supply system is provided which includes a filling station operable to provide a fluid to a fuel storage vessel. The fluid supply system is operable in a first mode to provide a fluid in a liquid phase from the filling station to the storage vessel and is operable in a second |
| 7575020 |
Multi stage pressure regulator |
August 18, 2009 |
| A pressure regulator is disclosed wherein multiple valve stages are used to accommodate low flow rates and to maximize a turn-down ratio of the regulator. |
| 7553569 |
Dynamic cathode gas control for a fuel cell system |
June 30, 2009 |
| A fuel cell system utilizes at least one flow restricting device to vary the stoichiometric quantity of cathode reactant flowing to two discrete cathode sides of the fuel cell system. The varying of the stoichiometric quantity of cathode reactant can be between two predetermined values. |
| 7525072 |
Heated O-ring |
April 28, 2009 |
| A heated O-ring that has particular application for providing sealing in the connector region of a compressed hydrogen storage tank in a fuel cell system. In one embodiment, an electrical heating wire is wound through the O-ring so that resistive heating is provide by applying an electri |
| 7484540 |
Liquid hydrogen storage tank with reduced tanking losses |
February 3, 2009 |
| A liquid hydrogen storage system having minimized tanking losses. Hydrogen is discharged from a liquid hydrogen tank through connector piping of a filling connector to a discharge pipe and then to an external device, such as a fuel cell. As such, the connector piping is maintained at a |
| 7442457 |
Fuel cell system with compressor and also a method for operating such a fuel cell system |
October 28, 2008 |
| A fuel cell system comprising a plurality of fuel cells combined together to form a fuel cell stack, with the fuel cell stack having an anode side with an inlet for a fuel and an outlet for non-consumed fuel and exhaust gases arising at the anode side as well as a cathode side with an in |
| 7363775 |
Use of Z-pipes in a liquid hydrogen tank |
April 29, 2008 |
| A Z-shaped, multi-channel conduit segment configured to transfer cryogenic fluid into and out of a cryogenic storage tank with minimal heat transfer. The conduit segment comprises a first channel operable to transport a cryogenic liquid from a supply source to the storage tank, and a |
| 7344788 |
Starting a fuel cell system using ambient air and a low voltage blower |
March 18, 2008 |
| A mechanization of a fuel cell system and a method of operating the same is provided which simplifies the start-up of the fuel cell system. The fuel cell system can be started up without using any battery derived high voltage power to drive a high voltage compressor. The present inventio |
| 7341074 |
Multi-stage pressure regulator |
March 11, 2008 |
| A pressure regulator that has particular application for an anode input side of a fuel cell system to provide the desired large turn-down ratio. The pressure regulator includes at least two valves positioned in parallel where the first valve is smaller than the second valve. The firs |
| 7322562 |
Shut-off valve providing pressure equalization |
January 29, 2008 |
| In accordance with the teachings of the present invention, a shut-off valve is disclosed that has particular application for opening and closing a high pressure compressed gas storage tank. In one embodiment, the valve includes a single sealing member and a bellows. High pressure is |
| 7320840 |
Combination of injector-ejector for fuel cell systems |
January 22, 2008 |
| A fuel cell system including a combined injector/ejector system. The pressure of a hydrogen gas being injected into the fuel cell system by the injector acts as a pump that draws an anode exhaust gas being carried by the ejector back into the fuel cell system. The respective gases mix |
| 7219695 |
Hydrogen valve with pressure equalization |
May 22, 2007 |
| A shut-off valve that has particular application for opening and closing a compressed hydrogen storage tank. In one embodiment, the valve includes two valve sealing members where one side of one valve sealing member is on the high pressure side of the valve and an opposing side of the ot |
| 7195035 |
In-tank hydrogen distribution valve |
March 27, 2007 |
| A hydrogen distribution valve for alternately distributing gaseous and liquid hydrogen from a tank is disclosed. The hydrogen distribution valve includes a valve housing having a gaseous hydrogen inlet, a liquid hydrogen inlet, a hydrogen outlet and a reference pressure port for rece |
| 7159456 |
Level indicator for liquid hydrogen tank |
January 9, 2007 |
| A liquid hydrogen tank assembly that employs a level sensor inductively coupled through the tank walls so as to minimize one conductive heat path through the tank walls. The tank assembly includes an inner tank and an outer tank having a vacuum layer therebetween to maintain the liquid |
