Disposable filter device and liquid aspirating system incorporating same
Patent 4459139 Issued on July 10, 1984. Estimated Expiration Date: 
September 14, 2001. 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.
September 14, 2001. 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 3631654 3650093 3782083 3854907 3882026 Vent device for ostomy appliance Parenteral liquid administration set with non-air blocking filter Blood filtering bag Volume limiting chamber Filter unit InventorsAssigneeApplicationNo. 06/301501 filed on 09/14/1981US Classes:96/6, Membrane to degasify liquid210/416.1, With pump, gas pressure, or suction source604/126, By hydrophilic or hydrophobic filters604/320, Having vacuum shutoff means (e.g., float valve, etc.)96/219And fluid filterExaminersPrimary: Spitzer, RobertAttorney, Agent or FirmInternational ClassesA61M 1/00 (20060101)B01D 19/00 (20060101) A61M 5/38 (20060101) A61M 5/36 (20060101) AbstractThe disposable filter device of the invention has a housing with a fluid inlet chamber and fluid outlet chamber separated by a hydrophobic filter and having a hydrophilic filter on the inlet chamber side of the hydrophobic filter. In the liquid aspirating system, the disposable filter device is connected between the liquid collection container and the inlet to the aspirator, the hydrophobic filter functioning to prevent the passage of any liquid to the aspirator and the hydrophilic filter functioning to prevent a large accumulation of liquid on the inlet chamber of the filter device and to better assure against any spillage of liquid in the inlet chamber during replacement of the device. | |
