Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1996-11-15
1999-01-12
Watkins, III, William P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428132, 428156, 428138, 428909, 248636, 248638, 312 9702, 312 91, 360 9702, 181207, 181208, 369263, 361685, H05K 502, H05K 718
Patent
active
058585095
ABSTRACT:
A composite shelf in a shelf frame supports a plurality of disk drives and attenuates vibrations in the shelf. In the composite shelf, there is a double wall having an outer wall and an inner wall for supporting the disk drives mounted on the shelf. A stiffener between the inner wall and outer wall strengthens the composite shelf to reduce flexure in the composite shelf when the shelf is loaded by disk drives mounted on the shelf. A damping layer is placed between the stiffener and one of the inner wall or outer wall. This damping layer attenuates vibrations in the composite shelf so as to reduce vibrations transmitted from the composite shelf to the disk drives supported by the composite shelf. A second damping layer is placed between the stiffener and the other wall. Both damping layers attenuate vibrations in the composite shelf so as to reduce vibrations transmitted from the composite shelf to the disk drives supported by the composite shelf. A third damping layer may be placed within the stiffener. The damping layers may be formed of adhesive damping layers, or a damping layer sandwiched between two adhesive layers. Alternatively, the stiffener is a spacer member between the inner wall and the outer wall.
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Bakthavachalam Nanjappa
Bruning, III Theodore Ernst
Dewitt Chad Everett
Ducharme Robert George
Polch Ewaryst Zygmunt
Digital Equipment Corporation
Watkins III William P.
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