Method for forming a crankshaft bearing having hydrodynamic thrust flanges
January 13, 2014. 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 ReferencesThrust bearing with tapered lands Thrust bearing Thrust bearing with tapered lands Offset wall bearing Method for making improved split bearings having masked relief areas Method for manufacturing a flanged half bearing Flanged half bearing Composite thrust bearing formed by a radial bearing with at least one separate axial thrust collar Hydrodynamic thrust bearing Connecting rod with hydrodynamic bearing Patent #: 4771744 InventorsAssigneeApplicationNo. 182308 filed on 01/13/1994US Classes:29/898.041, Thrust bearing29/898.02, Fluid bearing29/898.13, Bearing surface treatment72/379.6Forming undulationsExaminersPrimary: Rosenbaum, MarkAssistant: Hughes, S. Thomas Attorney, Agent or FirmForeign Patent References
International ClassF16C 033/14AbstractA split crankshaft bearing assembly includes two flanged half bearings adapted to collectively encircle a crankshaft. The flanges are formed with oil supply grooves that subdivide the flange surface into thrust bearing pads. Each pad includes a positively sloped ramp surface leading to a raised land surface. The rotating crankshaft drags a film of oil onto the land surface where it provides hydrodynamic thrust support for the shaft. To facilitate close tolerance control on the thrust bearing pad contour, the manufacturing process is carried out so that the oil supply grooves are formed and the thrust face presized prior to formation of the pad final contour. The pad contour is formed by a coining operation. | |
