Patent ID: 6786473
Filing Date: 2004-09-07
Classification: H02G

Abstract:
A connector for connecting a pull string to a tube for pulling the tube through a duct, the connector comprising:1) a first means for connecting the pull string to the tube; and 2) a second means for converting a tension force applied to the pull string into a rotational force about a pivot point between the connector and an obstructing edge, the connector rotating about the pivot point as the tension force is increased, the second means for converting further comprising, a) a header with an axial hole for the pull string to pass through, the header made of a solid material; b) an elastic cylinder connected to the header, the elastic cylinder axially unstable under compression; and c) a joiner that connects the cylinder to the tube; whereby the tension force is converted to the rotational force; and whereby the header becomes unstable at the pivot point and slips past the obstructing edge, enabling the connector to pass by the obstructing edge.