Patent ID: 7959551
Filing Date: 2011-06-14
Classification: A61M,F04D,F16C

Abstract:
1. A thrombo-resistant mechanical blood-immersible bearing for use in a rotary tubular blood pump, comprising: a. one or more biocompatible wear resistant rotating bearing surfaces positioned on a rotor within the blood pump; b. two or more stationary biocompatible mechanical bearing support posts comprising streamlined inwardly extending blades having a wear resistant bearing surface on each tip, fixed to a stationary outer wall of said tubular blood pump; c. said tubular pump comprised of plural flow channels separately formed in part by said support posts, and the rotor bearing surface; and d. said streamlined blades extending radially inward to separate each said flow channel and to form a bearing contact area between each blade tip and the rotor bearing surface that supports the rotor in position during rotation, wherein said blade tips provide plural bearing surfaces that, in operation, are washed by blood flow to prevent formation of an annular ring of thrombus proximate to the bearing.