Fluent material handling – with receiver or receiver coacting mea – Multiple passage filling means for diverse materials or flows – With valve
Reexamination Certificate
1999-08-17
2001-03-06
Douglas, Steven O. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
Multiple passage filling means for diverse materials or flows
With valve
C141S059000, C141S301000, C141S387000
Reexamination Certificate
active
06196280
ABSTRACT:
This invention relates to a combination nozzle and fuel tank fitting for delivering liquefied natural gas and components thereof.
Nozzles have heretofore been provided for delivering liquefied natural gas to vehicles. However, such liquefied natural gas (LNG) filling nozzles have been uninsulated which when delivering fuel would frost up. Therefore there is a substantial loss of the cryogenic LNG in cooling down the nozzle until the nozzle gets cold enough to keep the LNG in a liquid form. Such LNG filling nozzles typically have required a trained attendant that must normally wear gloves and a safety mask. There is therefore a need for a new and improved LNG filling nozzle which overcomes these disadvantages and is more user friendly.
In general, it is an object of the present invention to provide a combination nozzle and fuel tank fitting for delivering liquefied natural gas which can be utilized without a specialized attendant and permitting use of the same by a typical lay person capable of filling gas tanks of gasoline powered vehicles.
Another object of the invention is to provide a combination of the above character which has breakaway characteristics permitting the nozzle to separate from the fuel tank fitting in the event a user inadvertently drives the vehicle away without disconnecting the nozzle from the fuel tank fitting.
Another object of the invention is to provide a combination of the above character in which upon breakaway, the supply of LNG through the nozzle will be automatically terminated.
Another object of the invention is to provide a combination of the above character in which separate fuel delivery lines and vent return lines are provided.
Another object of the invention is to provide a combination of the above character in which the separate fuel delivery line and vent return line are insulated from each other and from ambient.
Another object of the invention is to provide a combination of the above character in which the nozzle is provided with an easily accessible operating lever controllable by the fingers of the same hand holding the nozzle to initiate and terminate the delivery of LNG and return of vented gas through the nozzle.
REFERENCES:
patent: 5301723 (1994-04-01), Goode
patent: 5327730 (1994-07-01), Myers et al.
patent: 5353849 (1994-10-01), Sutton et al.
patent: 5386699 (1995-02-01), Myers et al.
Lee Harold M.
Tate, Jr. Raymond E.
Ziegler Alan T.
Douglas Steven O.
Flehr Hohbach Test Albritton & Herbet LLP
Liberty Fuels, Inc.
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