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AssigneeSeagate Technology LLC
InventorsSamnathan Murthy, Alan Lyndon Grantz, Steve Parsoneault, Roger Allen Addy, Peter R. Riegler, Mohamed Mizanur Rahman
Estimating the term…
A hydrodynamic bearing useful as a bearing cartridge or as the cartridge may be incorporated into a spindle motor or the like, where the bearing includes a stationary shaft and two independent bearings, comprising a top cone and a bottom cone separated by a segment of the shaft. The bearing includes a sleeve rotating around and surrounding the shaft, and the top cone and bottom cone and defining a narrow gap between the sleeve and the shaft and cones. Sealing plates are supported on the sleeve to seal off the ends of the bearing and are located along the shaft beyond the cones. A gap also exists between an interior surface portion of each cone and the shaft. Thus, separate flow paths are established, one around the top cone and one around the bottom cone. By providing two independent paths, the flow rates do not have to be the same in each conical flow path for the bearing seals to function properly.
A hydrodynamic fluid bearing cartridge comprising a fixed central shaft carrying at least first and second conical elements separated by a circular shaft portion, said first and second conical elements being separated from distal ends of said shaft by outer end sections of said shaft, each of said conical elements comprising a generally conical surface and including an axial surface and a radial surface which extends from said axial surface to said conical surface, and a sleeve which rotates relative to the fixed shaft around a central axis of rotation defined by a central axis of said shaft, said sleeve supporting a counterplate to define a recess for each of said first and second conical elements, said recesses each including radial surfaces and generally conical surfaces facing said radial and conical surface of each said conical elements, to define a continuous gap around each said conical element, said gap further extending between said axial surfaces of said conical element extending parallel to an axial face of said fixed shaft, so that said continuous gap is defined around each said conical element, and
A magnetic disc storage system comprising a housing for one or more discs,
Dependencies are inferred from the claim text.