Lateral liner with seal

Abstract

A lateral liner assembly provides for sealing of the junction between a lateral sewer line and a main sewer pipe. The lateral liner assembly includes a body portion attached to a collar portion. A flange assembly is secured to the collar to provide a rigid base for a seal. The seal supported on the flange seals against the inner surface of the main sewer pipe. The seal provides a desired water tight seal for the junction between the main sewer line and the lateral sewer line.

1 . A liner assembly for repairing a main pipe line and a lateral pipe line connected thereto and in communication therewith to form a pipe joint:
 a main liner member and a lateral liner tube in communication with one another through a liner juncture, the lateral liner tube being adapted to extend within the lateral pipe line and the main liner member being adapted to extend within the main pipe line at the pipe joint; and   a gasket surrounding a portion of the lateral liner tube and the main liner member near the liner juncture, the gasket being made of a hydrophilic material that is impermeable and capable of swelling in response to being exposed to a liquid, thereby forming a seal between the main and lateral liners and the main and lateral pipe lines at the pipe joint.   
     
     
         2 . The liner assembly of  claim 1  wherein the gasket is attached to the main liner member. 
     
     
         3 . The liner assembly of  claim 1 , wherein the hydrophilic material is a hydrophilic rubber. 
     
     
         4 . The liner assembly of  claim 1 , wherein the hydrophilic material is a hydrophilic paste. 
     
     
         5 . An apparatus for repairing a main pipe line a lateral pipe line connected thereto and in communication therewith to form a pipe joint, the apparatus comprising:
 a bladder assembly comprising a main bladder tube and a lateral bladder tube in communication with one another through a bladder tube juncture;   a liner assembly comprising a main liner member and a lateral liner tube of resin absorbent material in communication with one another through a liner juncture;   the lateral bladder tube and the lateral liner tube being adapted to extend within the lateral pipe line with the lateral bladder tube being inside the lateral liner tube and the lateral liner tube being between the lateral pipe line and the lateral bladder tube;   the main bladder tube and the main liner member being adapted to extend within the main pipe line at the pipe joint with the main liner member being between the main pipe line and the main bladder tube; and   a band of an impermeable and hydrophilic material disposed on the outside of the main liner member and surrounding the liner juncture, the hydrophilic band capable of swelling in response to being exposed to a liquid, thereby forming a seal between the liner assembly and main pipe line around the point joint.   
     
     
         6 . The apparatus of  claim 5  wherein the impermeable and hydrophilic material is a hydrophilic paste. 
     
     
         7 . A method of repairing a main pipe line and a lateral pipe line connected thereto and in communication therewith to form a pipe joint;
 the method comprising: taking a bladder assembly including a main bladder tube and a lateral bladder tube;   taking a liner assembly including a main liner member and a lateral liner tube in communication with one another through a liner juncture; impregnating the liner assembly with a material capable of curing and hardening;   positioning a band of impermeable and hydrophilic material on the outside of the main liner member around the liner juncture;   moving the lateral liner tube and the lateral bladder tube within the lateral pipe line with the lateral bladder tube being within the lateral liner tube; and   exposing the hydrophilic band to a liquid that causes the band to swell, thereby forming a seal between the liner assembly and the main and lateral pipe lines at the pipe joint.   
     
     
         8 . The method of  claim 7  wherein the lateral liner tube and the lateral bladder tube are inverted into the lateral pipe line. 
     
     
         9 . The method of  claim 7  wherein the impermeable and hydrophilic material is a hydrophilic paste. 
     
     
         10 . A liner assembly for repairing a main pipe line and a lateral pipe line connected thereto and in communication therewith to form a pipe joint, the liner assembly comprising:
 a main liner member and a lateral liner tube in communication with one another through a liner juncture, the lateral liner tube being adapted to extend within the lateral pipe line and the main liner member being adapted to extend within the main pipe line about the pipe joint; and   a band disposed on the outside of the main liner member about the liner juncture, the hand being made of a hydrophilic and impermeable material capable of swelling in response to being exposed to a liquid, thereby forming a seal between the main liner member and the main pipe line near the pipe joint.   
     
     
         11 . The liner assembly of  claim 10  wherein the band of hydrophilic and impermeable material is ring-shaped and is disposed on the main liner member surrounding the liner juncture. 
     
     
         12 . The liner assembly of  claim 10  wherein the lateral liner tube is formed from a resin absorbent material. 
     
     
         13 . The liner assembly of  claim 10  wherein the lateral liner tube and the main liner member are formed from a resin absorbent material. 
     
     
         14 . The liner assembly of  claim 10  wherein the impermeable and hydrophilic material is a hydrophilic paste. 
     
     
         15 . A method of repairing a main pipe line and a lateral pipe line connected thereto and in communication therewith to form a pipe joint; the method comprising:
 taking a liner assembly including a main liner member and a lateral liner tube in communication with one another through a liner juncture;   positioning a band of hydrophilic and impermeable material on the outside of the main liner member around the liner juncture;   positioning the lateral liner tube within the lateral pipe line and the main liner member within the main pipe line; and   exposing the hydrophilic band to a liquid that causes the band to swell, thereby forming a seal between the liner assembly and the main pipe lines near the pipe joint.   
     
     
         16 . The method of  claim 15  wherein the band of hydrophilic and impermeable material is ring-shaped. 
     
     
         17 . The method of  claim 15  wherein the impermeable and hydrophilic material is a hydrophilic paste.