Nanjappa Bakthavachalam
Nursing at Julynn Rd, Colorado Springs, CO
License number
Colorado 732318
Issued Date
Dec 22, 2009
Renew Date
Dec 22, 2009
Expiration Date
Jan 31, 2012
Type
Certified Nurse Aide
Address
Address
7410 Julynn Rd, Colorado Springs, CO 80919
Professional information
Attenuating Vibrations In A Mounting Shelf For Multiple Disk Drives
US Patent:
5858509, Jan 12, 1999
Filed:
Nov 15, 1996
Appl. No.:
8/751126
Inventors:
Ewaryst Zygmunt Polch - Monument CO
Chad Everett Dewitt - Colorado Springs CO
Theodore Ernst Bruning - Colorado Springs CO
Nanjappa Bakthavachalam - Colorado Springs CO
Robert George Ducharme - Colorado Springs CO
Chad Everett Dewitt - Colorado Springs CO
Theodore Ernst Bruning - Colorado Springs CO
Nanjappa Bakthavachalam - Colorado Springs CO
Robert George Ducharme - Colorado Springs CO
Assignee:
Digital Equipment Corporation - Maynard MA
International Classification:
H05K 502, H05K 718
US Classification:
428166
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.
Energy Absorbing Viscoelastic Spacer For Reducing Vibration To Disk Drives
US Patent:
6134113, Oct 17, 2000
Filed:
Aug 28, 1997
Appl. No.:
8/927101
Inventors:
Richard E. Mills - Colorado Springs CO
Ewaryst Z. Polch - Monument CO
Nanjappa Bakthavachalam - Colorado Springs CO
Theodore Ernst Bruning - Colorado Springs CO
Ewaryst Z. Polch - Monument CO
Nanjappa Bakthavachalam - Colorado Springs CO
Theodore Ernst Bruning - Colorado Springs CO
International Classification:
G06F 116, H05K 502, F16F 700
US Classification:
361725
Abstract:
The viscoelastic spacer is made of a layer of viscoelastic material and a layer of wear-resistant, low coefficient of friction material which together form a unitary structure for damping vibration. Spacers are placed at the top and bottom of a storage module containing a disk drive. Upon slidable insertion of the storage module into an enclosure, features on the inner surface of the enclosure engage with the spacer in a way which subjects the spacer to both compression and shear forces generated by vibration of the disk drive and of other vibration sources in the environment of the storage module.