Abstract: An exhaust silencer for receiving exhaust gasses from an engine includes inner and outer cylindrical walls and top and bottom closure plates. The inner wall and the top and bottom closure plates define a central collection chamber. Baffles extend alternately from the inner cylindrical wall towards the outer cylindrical wall and from the outer cylindrical wall towards the inner cylindrical wall, so as to define an undulating path for exhaust gasses as they pass from the central collection chamber to an outlet. Sound insulating material is attached to each of the upstream surfaces of the baffles, to the outer surface of the central collection chamber, to the inner surface of the outer cylindrical wall, and to the inner surfaces of each of the top and bottom closure plates. The sound insulating material is protected by expanded metal. The baffles are attached at their vertical edges to the expanded metal and not to the actual inner and outer cylindrical walls themselves.

Abstract: A gate assembly including a gate portion, a gate support portion and a gate connecting portion; the gate portion including vertical end braces connecting and being affixed to the ends of horizontal board members and a vertical center brace, diagonal braces extending between the lower ends of the vertical end braces and the upper end of the vertical center brace; the gate support portion including a fixed vertical support column with a generally circular cross section, a rotatable anchor collar disposed adjacent the top of the support column, the collar surrounding the upstanding support column and being spaced therefrom in a generally horizontal plane, bearings disposed between the support column and the collar, U-shaped hinges disposed around the upstanding support column and freely rotatable with respect thereto, the free ends of the hinges extending along and being affixed to opposite ends of the gate portion adjacent one end thereof; the gate connecting portion including a bracket affixed along the length