Patent ID: 6351982
Filing Date: 2002-03-05
Classification: G01N

Abstract:
A housing for a flammable gas detector comprising: a housing body with an aperture through which the interior of the housing body communicates with the outside; and a gas permeable flame arrestor element located in the aperture for receiving flammable gases into the housing, said flame arrestor element comprising a sinter element in which the density of the sinter element is greater around the periphery of the sinter element than in the center of the sinter element, said flame arrestor element arresting the propagation of a flame front through the aperture to the outside in the event of an explosion within the housing, at least a portion of the housing body surrounding the aperture comprising a plastic material, said plastic material housing body portion being molded around the flame arrestor element to form said plastic material housing body portion and said flame arrestor element into an integral component in which the flame arrestor element is bonded and sealed about its periphery to said plastic material housing body portion to preclude a path for a flame front originating in the housing and said plastic material housing body portion is formed around the flame arrestor element to mechanically constrain the flame arrestor element from being dislodged from said aperture by an explosion within said housing.