Patent ID: 6390795
Filing Date: 2002-05-21
Classification: B29C,F16L

Abstract:
Apparatus for use in everting a flexible tubular liner into the interior of a hollow conduit, comprising:(a) a liner everter container having a bottom end having an outfeed element defining an outfeed opening and having a top end including an opening through which a liner can be fed into the liner everter container; (b) a liner inlet port assembly associated with said top end, and including: (i) a pressure bearing cover member defining an inlet slot having a pair of opposite elongate sides and a pair of opposite ends interconnecting said sides; (ii) a base sheet assembly mounted in said liner everter container beneath said cover member and defining an inlet mouth; and (iii) a pair of flexible lips interconnected with said base sheet assembly, located on opposite sides of said mouth and facing toward each other, said lips extending a first distance into said liner everter container toward said bottom end, said first distance being great enough for mutually confronting portions of said lips to be pressed sealingly against each other by fluid pressure within said liner everter container in excess of ambient atmospheric pressure surrounding said liner everter container; and (c) a liner attachment clamp associated with said outfeed opening and adapted to interconnect a first end of a liner sealingly to said liner everter container.