Extracorporeal blood circulation system and drip chamber with adjustable blood level
Patent 3964479 Issued on June 22, 1976. Estimated Expiration Date: 
June 22, 1993. 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 22, 1993. 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 2927582 3091239 3543752 3756234 3844283 3848592 InventorsAssigneeApplicationNo. 525426 filed on 11/20/1974US Classes:604/123, From pump injection device137/211.5, Gas injected by liquid pressure or flow210/90, Fluid pressure responsive417/249, Prior stage delivers to atmospheric chamber422/44, BLOOD TREATING DEVICE FOR TRANSFUSIBLE BLOOD604/251, Drip meter604/6.09, Filter means604/6.11Pumping meansExaminersPrimary: Truluck, Dalton L.Attorney, Agent or FirmAbstractIn accordance with the invention there is provided an extracorporeal blood circulation system including a drip chamber having a blood inlet in its top and a blood outlet in its bottom, such chamber during operation containing blood in its bottom portion and air in its top portion, an air passage communicating with the top of the chamber, an air pump communicating with the atmosphere and with the passage for pumping air through the passage from the chamber into the atmosphere and from the atmosphere into the chamber, and means for selectively actuating the pump to either pump air into or out of the chamber. | |
