Venkatesh J Vasudevan

US Patent:

20010040044, Nov 15, 2001

Filed:

Sep 24, 1999

Appl. No.:

09/406177

Inventors:

PRIYA L. TABADDOR - ALPHARETTA GA, US
VENKATESH VASUDEVAN - NORCROSS GA, US

International Classification:

H01B007/00

US Classification:

174/12100A

Abstract:

Embodiments of the invention include an electrical cable apparatus and method for making. The electrical cable comprises a plurality of paired conductive elements such as twisted pairs of individually insulated copper wire, a flame retardant yarn layer formed or wrapped helically around the conductor pairs or groups of conductor pairs, and a dielectric jacket formed around the conductive pairs and the yarn layer(s). The yarn layer is formed or wrapped around individual conductor pairs or, alternatively, around groups of conductor pairs. The yarn layer is made of, e.g., glass yarn, non-woven glass yarn tape, polyimides such as Kapton tape, polyaramid yarns such as Kevlar and Nomex, or other suitable flame retardant materials and/or material combinations. The method for making the electrical cable comprises providing a plurality of paired conductive elements, forming a flame retardant yarn layer around the conductor pairs or around groups of conductor pairs, and forming a dielectric jacket around the conductor pairs and yarn layers. During bum conditions, the flame retardant yarn layer wicks melted insulation from the individual insulated conductor pair elements to reduce the likelihood of melted insulation pooling in the cable and breaching the dielectric jacket of the cable. Also, various yarn layer arrangements maintain separation of the conductor pairs within the cable for reduced crosstalk.

US Patent:

20080033415, Feb 7, 2008

Filed:

Mar 16, 2007

Appl. No.:

11/724791

Inventors:

Gregory Rieker - Palo Alto CA, US
Venkatesh Vasudevan - Stanford CA, US
Uday Kumar - San Francisco CA, US
William Croisettier - Stanford CA, US
William Bragg - Palo Alto CA, US
Gary Mekikian - La Canada CA, US
Richard Whyte - Palo Alto CA, US

International Classification:

A61B 18/02
A61M 29/00

US Classification:

606021000, 606191000

Abstract:

Aspects of the invention relate to an apparatus for moving the esophagus having an elongate body having a distal tip, a controlled curvature section, and a flexible section. A handle is coupled to the flexible section having means for adjusting the curvature of the controlled curvature section. Additionally, the length of the controlled curvature section is less than the length of the thoracic portion of the esophagus. Alternatively, there is an apparatus for moving the esophagus having a flexible elongate body having a distal tip, a controlled curvature section, and a proximal section. A bendable element is within the controlled curvature section that, when bent, moves and holds the controlled curvature section into a corresponding bent shape. There is provided various methods of adjusting the curvature of the esophagus during a therapeutic procedure in a treatment area outside of the esophagus. The method includes positioning within the esophagus an elongate body having a distal tip, a controlled curvature section, and a flexible section wherein, the length of the controlled curvature section is less than the length of the thoracic portion of the esophagus. Next, adjusting the curvature of the controlled curvature section to increase the distance between the esophagus and a treatment area outside of the esophagus.