Abstract: In accordance with certain embodiments, a cooler for multiple tube banks features a series of parallel and planar fins that have upstream louvers to direct incoming air through a fin near a first row of tubes and a downstream set of louvers near an adjacent tube row to direct air back through the same fin before the air exits. By way of example, the upstream louvers have the negative slope of the downstream louvers and a constant angle from louver to louver within a bank. A constant length in a section view may be provided.

Abstract: A bearing that can be reoriented to move its center is disclosed. The center of the bearing is offset from the center of its outer housing. Should the shaft extending through the bearing need to be raised or lowered the outer housing is simply rotated in its receptacle and its position is fixed. Reconfiguring the bearing receptacle or using shims is eliminated and the alignment process is rendered shorter and more reliable future operation is obtained.

Abstract: An end element for rotating equipment that is driven through a Hirth coupling is manufactured independently of the Hirth coupling halves. In that manner, in the event maintenance or repair is required to the Hirth coupling halves or the end element such as a turbine wheel or compressor impeller, only the structure needing maintenance or repair needs to be worked on rather than the entire assembly. End elements that previously came integrated to a half of a Hirth coupling can be retrofitted to mount a removable Hirth coupling half. In the process of machining away material from the end element to reduce running stresses, a boss can be created to mount the Hirth coupling half.