Dual seal for optimized performance
AssigneeSeagate Technology LLC
InventorsNorbert S. Parsoneault, Robert Alan Nottingham, Alexander Parkhomovsky, Robert M. Pelstring, Jeffry Arnold Leblanc, Troy Michael Herndon
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Abstract
A fluid dynamic bearing having a hub, a sleeve, and a sealing arrangement comprising a first capillary seal substantially retaining a first fluid and a second capillary seal comprising a second fluid. The second capillary seal is located between the first capillary seal and an opening between the hub and the sleeve.
Claims22
A fluid dynamic bearing including a hub, a sleeve, and a sealing arrangement comprising:
- a first capillary seal substantially retaining a first fluid;
- and
- a second capillary seal comprising a second fluid and located between the first capillary seal and an opening at a protrusion between the hub and the sleeve.
A spindle motor having a fluid dynamic bearing including a sealing arrangement, comprising:
- a sleeve and a hub, wherein one of the sleeve and the hub rotate relative to the other;
- a first fluid disposed between the hub and the sleeve;
- a first capillary seal substantially retaining the first fluid;
- and
- a second capillary seal comprising a second fluid and located between the first capillary seal and an opening between the hub and the sleeve, wherein the sleeve includes a protrusion and the second capillary seal is formed at the protrusion.
A method for sealing a fluid dynamic bearing, the method comprising:
- filling the fluid dynamic bearing with a first fluid retained by a first capillary seal;
- and
- forming a second capillary seal at a protrusion between a hub and a sleeve, the second capillary seal being positioned between the first capillary seal and an opening in the fluid dynamic bearing, the second capillary seal comprising a second fluid.
Dependencies are inferred from the claim text.