The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1982
Filed:
Sep. 12, 1980
Jose Bisera, Camarillo, CA (US);
Max H Weil, Beverly Hills, CA (US);
Institute of Critical Care Medicine, Los Angeles, CA (US);
Abstract
An apparatus is provided for injecting fluid into a patient over an extended period of time, such as in intravenous feeding of a patient. The apparatus enables close control of injection quantity and rate while assuring an even flow into the patient. The apparatus utilizes relatively simple disposable parts. The apparatus includes an air-operated peristaltic pump which pumps a controlled amount of fluid in each cycle of operation, and a pressure moderator which receives the liquid pulses and supplies an even flow to the patient. The moderator includes a closed chamber, and a resilient tube connected to the pump and having slits that permit the escape of pumped liquid into the chamber. The peristaltic pump includes a flexible but nonresilient tube connected to the container, the nonelasticity assuring that the tube does not expand beyond a predetermined dimension when a vacuum is applied to it.