Robert Lon Freeman

US Patent:

49807862, Dec 25, 1990

Filed:

Nov 14, 1988

Appl. No.:

7/270717

Inventors:

William O'Sullivan - Milpitas CA
Robert Freeman - Erie CO
Harold T. Wright - San Carlos CA

Assignee:

Maxtor Corporation - San Jose CA

International Classification:

G11B 3314

US Classification:

360 9703

Abstract:

A thermally independent dedicated servo disk drive where the temperature is kept within an acceptable range and temperature gradients that can cause differential thermal expansion are eliminated to minimize off tracking due to differential thermal expansion of thermally sensitive components. A novel isolated "box within a box" architecture is utilized to provide a thermal buffer to external temperature gradients and an inner HDA support structure is coupled to an outer housing with thermally insulative isolators which prevent the conductive transfer of heat from external sources where the outer housing and isolators create a thermal buffer to shield the inner HDA support structure from external heat sources. In addition, certain heat generating components not integrated into the symmetrical thermal "box within a box" design are isolated where possible. Thus, a thermally symmetrical environment is provided in the area of thermally sensitive components that could otherwise degrade tracking during temperature transients.

US Patent:

50579541, Oct 15, 1991

Filed:

Feb 13, 1989

Appl. No.:

7/310292

Inventors:

William O'Sullivan - Milpitas CA
Robert D. Freeman - Erie CO

Assignee:

Maxtor Corporation - San Jose CA

International Classification:

G11B 554

US Classification:

360105

Abstract:

A head loading mechanism for a disk drive. When power to the disk drive is disconnected, an actuating spring is released. Movement of the spring causes a plunger to contact a bracket on the actuator arm, moving the actuator arm over a parking zone. Further movement of the spring causes blades to lift read/write heads mounted on the actuator arm away from disk surfaces. When power is restored, a motor compresses the spring and returns the plunger and the blades to their original positions.