Patent ID: 6796547
Filing Date: 2004-09-28
Classification: G02B

Abstract:
A method of installing a cable in an inner pathway comprising the steps of:providing a duct with a collapsible wall to form said inner pathway, said collapsible wall being movable between an extended condition to provide the duct with a first cross-sectional area and a contracted condition to provide said duct with a second cross-sectional area smaller than said first cross-sectional area, inserting said duct with said collapsible wall in said contracted condition into said outer conduit, moving said collapsible wall to said extended condition to provide said duct with said first cross-sectional area, inserting said cable into said duct with said collapsible wall in said extended condition, and moving said collapsible wall to said contracted condition with said cable extending through said duct within said outer conduit.