Method of forming an end seal for a pipe liner
AssigneeInsituform of North America, Inc.
InventorHernan R. Menendez
Life of this patent
Estimating the term…
Abstract
In order to effectively seal the space between a preexisting pipe and a repair lining that has been inserted into the pipe and radially expanded in order to generally conform to the interior of the pipe, a form is inserted between the ends of the pipe and lining before the lining is radially expanded, the lining therefore conforms to the interior of the pipe along its length and to the interior of the form at its ends, the form is removed, a sealing ring is inserted into the space left by the form and is there sealingly compressed, and an element is inserted into that space axially outside the sealing ring in order to retain it in position and preferably to compress it axially of the pipe.
Claims18
In conjunction with the repair of a length of pipe by inserting a lining into said pipe, the method of sealing an end of an joint between said lining and an end of said pipe which comprises:
- (a) inserting said lining into said pipe and locating a tubular form radially between said lining and said end of said pipe;
- (b) forming said lining by radially urging said lining into engagement with an interior surface of said pipe and an interior surface of said tubular form and retaining said lining in its formed condition;
- (c) removing said tubular form to leave a space between said tube and said lining;
- (d) inserting into said space formerly occupied by said tubular form a sealing ring which is radially compressed within said space, and
- (e) inserting packing means into that portion of said space formerly occupied by said tubular form which is axially between said end of said pipe and said sealing ring and securing said packing means in place, thereby to prevent escape of said sealing ring from said space.
Dependencies are inferred from the claim text.