Pivot bearing cartridge having inner and outer ball bearing sets
AssigneeWestern Digital Technologies, Inc.
InventorKamran Oveyssi
Life of this patent
Estimating the term…
Abstract
A pivot bearing cartridge for use in a head stack assembly. The pivot bearing cartridge is provided with a pivot bearing cartridge base. The pivot bearing cartridge is provided with a pivot shaft in mechanical communication with the pivot bearing cartridge base. The pivot bearing cartridge is provided with an inner ball bearing set surrounding the pivot shaft. The inner ball bearing set has a first inner race and a first outer race. The first inner race is attached to the pivot shaft. The pivot bearing cartridge is provided with an outer ball bearing set surrounding the inner ball bearing set. The outer ball bearing set has a second inner race and a second outer race. The second inner race is fixed relative to the first outer race.
Claims19
A pivot bearing cartridge for use in a head stack assembly, the pivot bearing cartridge comprising:
- a pivot bearing cartridge base;
- a rotatable pivot shaft in mechanical communication with the pivot bearing cartridge base;
- a pivot bearing cartridge cap attached to the pivot shaft;
- a single inner ball bearing set surrounding the pivot shaft, the inner ball bearing set having a first inner race and a first outer race;
- and
- a single outer ball bearing set surrounding the inner ball bearing set, the outer ball bearing set having a second inner race and a second outer race, the first outer race and the second inner race are attached to the pivot bearing cartridge base, the first inner race is attached to the pivot shaft and the second outer race is attached to the pivot bearing cartridge cap.
A disk drive comprising:
- a head stack assembly having an actuator body, the actuator body having a bore;
- and
- a pivot bearing cartridge disposed within the bore, the pivot bearing cartridge comprising:
- a pivot bearing cartridge base;
- a rotatable pivot shaft in mechanical communication with the pivot bearing cartridge base;
- a pivot bearing cartridge cap attached to the pivot shaft;
- a single inner ball bearing set surrounding the pivot shaft, the inner ball bearing set having a first inner race and a first outer race;
- and
- a single outer ball bearing set surrounding the inner ball bearing set, the outer ball bearing set having a second inner race and a second outer race, the first outer race and the second inner race are attached to the pivot bearing carriage base, the first inner race is attached to the pivot shaft and the second outer race is attached to the pivot bearing cartridge cap.
A pivot bearing cartridge for use in a head stack assembly, the pivot bearing cartridge comprising:
- a pivot bearing cartridge base;
- a stationary pivot shaft attached to the pivot bearing cartridge base;
- a pivot bearing cartridge cap rotatably attached to the pivot bearing cartridge base;
- a single inner ball bearing set surrounding the stationary pivot shaft, the inner ball bearing set having a first inner race and a first outer race;
- and
- a single outer ball bearing set surrounding the inner ball bearing set, the outer ball bearing set having a second inner race and a second outer race;
- wherein the first inner race is attached to the stationary pivot shaft, the second outer race is attached to the pivot bearing cartridge base and the first outer race and the second inner race are attached to the pivot bearing cartridge cap.
Dependencies are inferred from the claim text.