The present invention relates to spark traps/arrestors that are unproved relative to those that currently exist. For example, the present invention relates to a spark arrestor/trap that comprises a plurality of features that allows sparks/embers to be more effectively extinguished. The spark trap/arrestor of the present invention has at least two of vanes, conical devices and u-turns that allows for sufficient oxygen and a tortured path that is sufficiently long so as to effectively extinguish sparks and/or embers that enter the system. Alternatively, the system relates to a spark arrestor that comprises all of vanes, conical devices and u-turns that allows for sufficient oxygen and a tortured path that is sufficiently long so as to effectively extinguish sparks and/or embers that enter the system. In one embodiment, the various parts of the spark arrestor can be separated allowing for easy cleaning of the system.

A flame arrester 10, the flame arrester 10 having a housing 2 in which there is provided a flame arrester element 3 and into which extends a conduit 1, a portion of the conduit being at least partially surrounded by the flame arrester element 3 and wherein the conduit 1 has a principal flow axis extending along the conduit for flow of gas into or out of the flame arrester 10 and the flame arrester element 3 has a principal flow axis for flow of gas out of or in to the flame arrester 10, the principal flow axis along said portion and the principal flow axis through the flame arrester element 3 extending in opposite directions and wherein the conduit 1 has a cross sectional area A and, at a working surface, the flame arrester element 3 has a cross sectional area of A or above.

Apparatus for substantially blocking flames and spreading heated gases emitted from a broiler flue. The apparatus includes a riser placed above the broiler flue for defining a pathway along which heated gases are exhausted from the flue, a catalyst support on the riser for supporting a catalyst in the pathway for flow of heated gases through the catalyst from a bottom surface of the catalyst to a top surface of the catalyst, and a plurality of baffles in the riser extending across the pathway below the catalyst support. The baffles have the shape of inverted troughs.

An anti-fire safety system for a transport vehicle has one or more storage tanks storing hydrogen. The system includes a first hydrogen-releasing system, which is configured to release outside the vehicle hydrogen contained in at least one of the storage tanks. The system also includes a second release system, which is arranged to intervene and bypass the first hydrogen release system under predetermined operative conditions. The second release system is configured to transform by a chemical reaction, at least a part of the bypassed hydrogen flowing outward from at least one storage tank, into at least one different substance.