Seagate Technology Incorporated

Jeffrey G Barina

Khosrow Mohajerani

Joseph M Sampietro

Anoush M Fard

Muhammad A Hawwa

LeRoy A Volz

Tien Q Le

Daniel R Vigil

Richard G Krum

Michael A Maiers

Frederick Frank Kazmierczak

Ryan Andrew Sievers

Bruce Lynn Blakeslee

Robert Terry Haas

The sleeve of an actuator bearing cartridge is provided with an inclined surface on its outer surface. A tolerance ring is placed around the sleeve, and the cartridge and ring are then press-fit into the actuator bore together. Axial slippage of the ring and actuator relative to the cartridge is prevented as the ring is effectively wedged between the inclined surface and the inner surface of the actuator bore.

Increased slip force pivot bearing

A system for loading a transducing head ( ) to a flying elevation proximate a rotating surface of a disc ( ) is disclosed. The system includes a piezoelectric device ( ) that is selectively expanded and contracted to control a height of the head ( ) on a flexure spring ( ) from the surface of the disc ( ). The system preferably includes control circuitry ( ) for generating electrical control signals to manage the expansion and contraction of the piezoelectric device ( ) according to operating characteristics of the disc ( ).

Piezoelectric head loading and unloading device for rigid disc drives

An inertial latch apparatus for maintaining an actuator arm in a disc drive in a predetermined position has an elongated inertial beam member pivotally mounted in the disc drive for rotation in a plane parallel to the plane of rotation of the actuator arm and a latch member pivotally mounted in the disc drive for rotation between a disengaged position permitting movement of the actuator arm when the latch member is in the disengaged position and an engaged position in interference relation to a portion of the actuator arm to prevent movement of the actuator arm when the drive is subjected to an external shock load. The latch member rotates in only one direction in response to rotation of the beam member in either a clockwise or counterclockwise direction from a neutral position.

Inertial latch for mobile disc drive

A system for positioning a transducing head in a disc drive device over a selected track of a rotatable disc includes an actuator arm which is rotatable about an axis, a head suspension mechanism connected to the actuator arm, and a slider carrying a transducing head and supported by the head suspension mechanism. A low resolution motor moves the actuator arm about the axis to effect coarse movement of the head between tracks of the disc. A piezoelectric element is embedded in the actuator arm to distort the arm to effect fine positioning of the head. Control circuitry distributes electrical signals to the low resolution motor and the piezoelectric element to selectively control movement thereof. The piezoelectric element is embedded in the actuator arm by removing a predetermined amount of material from the actuator arm and bonding the piezoelectric element in the resulting space in the actuator arm.

Method of making an actuator arm integrated piezoelectric microactuator

Noise effects in a disc drive having a disc on a rotating spindle in a housing are reduced by inducing vibrations in the housing of the disc drive that at least partially cancel a characteristic acoustic noise signal of the drive.

Active noise cancellation in disc drives

Bimorph piezoelectric microactuator head and flexure assembly

Actuator arm integrated piezoelectric microactuator

E-block head stack microactuator assembly

Growing community of inventors

Somis, CA, United States of America

Jeffrey G Barina