Apparatus controls the maximum pressure of the fluid which can flow through a pump. The apparatus includes a disposable unit with an inlet for receiving fluid from a source, an outlet for transferring the fluid to a patient and a chamber communicating between the inlet and the outlet. A diaphragm across...http://www.google.fr/patents/US4364386?utm_source=gb-gplus-shareBrevet US4364386 - Apparatus for converting a pump to a controller
