Patent ID: 8240917
Filing Date: 2012-08-14
Classification: F16C

Abstract:
1. A fluid dynamic bearing pattern ( 60 ; 70 ; 128 ) that is disposed on at least one bearing surface of a fluid dynamic bearing ( 10 ; 126 ) comprising at least two bearing parts ( 12 , 16 , 18 , 20 ; 114 , 116 ) moveable with respect to each other along a direction of movement ( 58 ; 130 ), wherein the bearing pattern ( 60 ; 70 ; 128 ) comprises two related grooved sections ( 62 , 64 ; 72 , 74 ; 128 a , 128 b ), wherein each section ( 62 , 64 ; 72 , 74 ; 128 a , 128 b ) extends at an acute angle with respect to the direction of movement ( 58 ; 130 ) and exerts a defined pumping effect on the bearing fluid found in the bearing when the bearing parts move with respect to one another, characterized in that the first section ( and wherein the groove depth of the first section is different from the groove depth of the second section.