A pumping apparatus of the bellows type, which is adapted for artificial respiration of a distressed person having temporarily no ability to breathe by himself, comprises a bag (2), arranged with two mutually movable walls (3,4) delimiting the inner volume thereof, to participate in delimiting the inner...http://www.google.co.uk/patents/US5345929?utm_source=gb-gplus-sharePatent US5345929 - Pumping device
