Diaphragm type blood pump for medical use
Patent 4411603 Issued on October 25, 1983. Estimated Expiration Date: 
June 24, 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.
June 24, 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 2378613 3058140 3145659 3514231 3610698 3802807 Aspirating device Patent #: 4051852 InventorAssigneeApplicationNo. 06/276752 filed on 06/24/1981US Classes:417/479, Distributor formed from integral portion of flexible wall pumping member137/855, Flap or reed604/153Deformable resilient chamber typeExaminersPrimary: Gluck, Richard E.Attorney, Agent or FirmInternational ClassesF04B 43/02 (20060101)A61M 1/10 (20060101) AbstractA positive displacement pump for delivery of blood, or the like, from patients to an extracorporeal circuit, for purification, as in hemodialysis treatments. The pump is small, and sufficiently inexpensive to be discarded after one use. The pump comprises a single blood chamber attached to inlet and outlet conduits separated from the chamber and each other by low resistance flapper valves. The flapper valves are integral with a flexible diaphragm which forms one side of the blood chamber and are operative to close the outlet valve and to open the inlet valve to fill the blood cavity responsive to withdrawal of the diaphragm from the blood chamber cavity and to reverse each valve upon penetration of the diaphragm into the blood chamber to deliver uniformly small increments of blood to an artificial kidney or other blood treatment device. | |
