Self priming filter apparatus
Patent 5439587 Issued on August 8, 1995. Estimated Expiration Date: 
July 27, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 27, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3523408 3631654 3650093 3730353 3803810 3854907 3905905 Hydrophobic valve Parenteral liquid administration set with non-air blocking filter Intravenous solution filter unit InventorsAssigneeApplicationNo. 098171 filed on 07/27/1993US Classes:210/321.64, Plural diverse structured membranes within a single casing96/6, Membrane to degasify liquid96/219, And fluid filter210/321.75, Planar membrane210/321.84, Planar membrane210/346, Spaced wall-type filters210/436, Vented210/446, Axially aligned inlet and outlet210/455, Receptacle and modified spacing surface or support for filter medium210/472, Vented422/101, Including means for separating a constituent; e.g., filter, condenser, extractor, etc.604/126, By hydrophilic or hydrophobic filters604/406Filter or series thereof for liquid entering or leaving containerExaminersPrimary: Lithgow, Thomas M.Attorney, Agent or FirmForeign Patent References
International ClassesA61M 005/165B01D 019/00 AbstractA self-priming filter holder for filtration of intravenous liquids is provided and is formed of one or two housing portions sealed to a core portion. The core portion has one or two ribbed surfaces forming a plurality of flow paths sealed at one end and open at a second end and at least one channel preferably larger than the flow paths. The channel(s) is in fluid communication with the flow paths and an outlet. An inlet is provided to the interior of the housing portion(s) which are sealed from the ribbed surfaces by hydrophilic membranes. The housing portion(s) can be provided with gas vents sealed with hydrophobic membranes. Fluids pass through the flow paths in one direction and through the channel(s) in an opposite direction to remove gas from the flow paths and channels prior to use.Field of SearchMembrane to degasify liquidDEGASIFYING MEANS FOR LIQUID And fluid filter Degasification of liquid By liquid flow modifying or mechanical agitating Vented Receptacle and modified spacing surface or support for filter medium Vented Plural diverse structured membranes within a single casing Planar membrane Planar membrane Axially aligned inlet and outlet Spaced wall-type filters Central header Including means for separating a constituent; e.g., filter, condenser, extractor, etc. By hydrophilic or hydrophobic filters Filter or series thereof for liquid entering or leaving container | |
