Abstract: An air pollution control apparatus for capturing airborne pollutants present in a relatively confined environment. The apparatus includes a portable airborne-pollutant capturing device movable to a site of pollutant origin and having at least one airborne-pollutant collector member which can be non-limitedly exemplified as a collection hood positionable at the site of pollution for pollutant collection or a painting tray upon which items can be placed and painted and beneath which resultant pollutant can be collected. A vacuum system is present within the capturing device and is in communication with the one or more collector members to draw airborne pollutants into the capturing device through the pollutant collector member. Actual capture of pollutants is accomplished by a filter system within the capturing device. The filter system can include one filter or more than one identical or different filters chosen for enhanced filtration capabilities in relation to pollutants present.

Abstract: A heat-resistant, thermally insulative, ductile port liner for a head of an internal combustion (IC) engine having a tube-shaped structure formed from at least one layer of fiber reinforced ceramic matrix composite (FRCMC) material. The FRCMC material includes a polymer-derived ceramic resin in its ceramic form and fibers. In a first embodiment of the port liner, the tube-shaped structure has one FRCMC layer forming the sole, solid wall of the structure. Whereas, in a second embodiment, the tube-shaped structure has two FRCMC layers forming inner and outer walls of the structure, respectively, with an intervening space separating the inner and outer walls. The intervening space is sealed at both ends It can be filled with a thermally insulating material, evacuated and held at substantially a vacuum pressure, or filled with a gas. Once the port liner has been formed, it is preferably cast-in-place when the metal head of the IC engine is formed.