On the Classification of Compressor,Pump or Engine Designs Using Generalized Linkages

Starting with Wankel's classification of volume changing devices that are suitable for positive displacement type compressors, pumps or engines it is argued that other ways of classifying should also be explored. As a possible useful classification aid, the concept of generalized linkages is proposed. Using examples, it is illustrated how this concept aids the designer in obtaining inversions of basic mechanisms and variations of mechanisms.