US Patent No: 4,236,880

Number of patents in Portfolio can not be more than 2000

Nonpulsating IV pump and disposable pump chamber

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A small, accurate, reliable and economical pump which is particularly useful in intravenous (IV) feeding includes a disposable pump chamber and a pump housing. The disposable pump chamber has an inlet, an outlet, and first and second flexible rolling diaphragm pumping chambers. First and second cylinders in the pump housing are positioned to receive the first and second flexible rolling diaphragms of the disposable pump chamber. First and second pistons are movable in the first and second cylinders, respectively. In addition, first and second valves are provided in the pump housing. The first valve controls fluid flow between the inlet and the first flexible rolling diaphragm pump chamber, while the second valve controls fluid flow between the first flexible rolling diaphragm pumping chamber and the second flexible rolling diaphragm pumping chamber. A motor and cam shaft drive the first and second pistons and the first and second valves. The first and second valves are controlled so that one valve is closed at all times, thereby providing fail safe operation of the pump.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GRASEBY MEDICAL LIMITEDST PAUL, MN40
AVI, INC.,ST PAUL, MN8

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Archibald, G Kent Vadnais Heights, MN 33 1434

Cited Art

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
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ZEVEX, A UTAH CORPORATION (1)
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OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,088,515 Valve system with removable fluid interface 239 1990