Invention Grant
US07674072B2 Connection between a lateral and main pipe and method for making same 有权
侧管和主管之间的连接及其制造方法

Connection between a lateral and main pipe and method for making same
Abstract:
Apparatus and method for connecting a lateral pipe to a main pipe are provided by a tool having a first end within the main pipe and a second end outside the lateral pipe so as to apply pressure to the below-ground connection of the main and lateral pipes from an above-ground location. The entire operation may be done without a person having to enter into an access opening in the ground to connect the lateral pipe to the main pipe. A laser is used to determine the depth of the access hole relative to the surface of the ground and the main sewer pipe.
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