Pressure relief system

Details Pressure relief system Pressure relief system

1999-09-20

2000-09-05

Lee, Kevin

Fluid handling

Plural tanks or compartments with parallel flow

137267, F17D 104

Patent

active

061127604

ABSTRACT:
A safety relief system for a CNG fuel supply of a vehicle includes first and second Type 4 cylindrical tanks, each having a shutoff valve at a first end and an outlet at a second end of the tanks. First and second relief devices are attached directly to the shutoff valve of the first and second tanks, respectively. Two separate relief outlet lines are connected to the outlets of the tanks. A common relief line is located generally parallel to and lying between the first and second tanks. The two separate relief lines are both connected to the common relief line. Third and fourth relief devices are connected to the common relief line. Each of the relief devices is constructed to relieve pressure on both the first and second tanks in response to either an excessive pressure or and excessive temperature at that relief device.

REFERENCES:
patent: 5361796 (1994-11-01), Mutter
patent: 5603360 (1997-02-01), Teel
patent: 5615702 (1997-04-01), Dawans et al.
patent: 5676180 (1997-10-01), Teel
Exhibit A shows one example of a prior art roof mounted CNG fuel system for a transit bus is that manufactured by New Flyer. (Jul. 15, 1996).
Exhibit B illustrates another prior art roof mounted CNG fuel supply system for transit buses is that in use by Orion Bus Industries. (undated but admitted to be prior art).
Exhibit C is an illustration of a prior art fill block (undated but admitted to be prior art).
Exhibit D is a manual for a prior art fuel system sole by Neoplan USA Corp. (Oct. 1996).
Exhibit E is a copy of NFPA52 Compressed Natural Gas (CNG) Vehicular Fuel Systems Code 1998 Edition. Section 3-5.2 deals with the mounting of fuel lines. (1998 admitted to be prior art).
Exhibit F is a copy of Los Angeles County Metropolitan Transportation Authority DR4202 Technical Requirements. Section 13.9 deals with the fuel system, and Section 13.9.2 requires that the fuel cylinders be mounted on the roof in such a manner that replacement of one cylinder shall not require the removal of additional cylinders. (undated but admitted to be prior art).

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