Patent ID: 7981083

Claim:
An enteral, parenteral or infusion feeding pump with a battery-powered drive mechanism, comprising an elastic circular membrane and two valves situated upstream and downstream, respectively, of this membrane, which latter has a diameter of 3 to 25 mm and is subjected to a pressure preload of between 1×10 4 and 4×10 4 Pa such as to enable it to return to its rest position at a maximum working frequency of between 8 and 12 Hz with a stroke of between 0.2 and 2 mm, corresponding to a maximum flow rate of 1.5 to 2.5 L/h and the drive mechanism comprises an electromagnet whose moving part is directly connected to said membrane, a standard battery to power this electromagnet with an available energy of 7000 to 10 000 J, means for analyzing the electromagnet supply current and detecting in each pump drive cycle a predetermined minimum value of the supply current corresponding to closure of the air gap of the electromagnet, and means for interrupting the supply current once this minimum value is reached, in order to ensure that one battery charge cycle can pump between 10 and 120 liters.