Abstract: A stanchion arrangement is provided. The stanchion arrangement is especially configured for use on a moving vehicle, such as a truck, to support equipment such as a muffler assembly. The preferred stanchion arrangement includes at least two, for example four, tubular components, secured to one another. An arrangement or assembly including a stanchion arrangement in combination with equipment such as a muffler is provided. Also methods of assembly and use are provided.

Abstract: A two-stage air cleaner with side-by-side elements. The cleaner has a first element (30), a second element (32) which itself may have a safety element (35). The first element (30) is preferably a conical inertial separator having a scavenge outlet (38). The second element preferably employs a pleated filter (50) which receives cleaned air (indicated by arrows 104) which passes through the filter (as indicated by arrows 106) to the outlet tube (56). In an alternative embodiment, pleated filter (50a) may have a reverse taper corresponding to that of the conical inertial precleaner (30a), thereby reducing the size of the housing.

Abstract: An improved air cleaner having a filter specially adapted for ready insertion and removal without tools, and for improvement of the seal against direct air flow between the inlet and outlet of the cleaner.