Perfusion or enteral/parenteral feeding pump

Details Perfusion or enteral/parenteral feeding pump Perfusion or enteral/parenteral feeding pump

2011-07-19

2011-07-19

Lucchesi, Nicholas D (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C417S417000, C604S156000

Reexamination Certificate

active

07981083

ABSTRACT:
This pump with a battery-powered drive device comprises a circular elastic diaphragm (1a) and two valves (2b,10), which has a diameter of 3 to 25 mm and is subjected to a compressive prestress of between 1'104and 4'104Pa capable of enabling it to return to its rest position at a maximum working frequency of between 8 and 12 Hz with a travel of between 0.2 and 2 mm, corresponding to a maximum flow rate of 1.5 to 2.5 l/h. The drive device comprises an electromagnet (5) in direct contact with the diaphragm (1a), a standard power supply battery, the available energy of which is from 7000 to 10'000 J, means for analyzing the supply current for the electromagnet and for detecting, at each pumping drive cycle, a minimum defined intensity of the supply current corresponding to the closure of the gap of the electromagnet (5) and means for interrupting the supply current once this minimum intensity has been reached.

REFERENCES:
patent: 5246147 (1993-09-01), Gross
patent: 6589229 (2003-07-01), Connelly et al.
patent: 2004/0127852 (2004-07-01), Gray et al.
patent: 2004/0220553 (2004-11-01), Olsen
patent: 2005/0191194 (2005-09-01), Falk et al.
patent: 2010/0130934 (2010-05-01), Rochat
patent: 93/23096 (1993-11-01), None
patent: 2004/060435 (2004-07-01), None
International Search Report for PCT/CH2008/000090, mailing date of Jun. 2, 2008.

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