Chimney lining slip form

DETAILED DESCRIPTION In lining chimeny pipes with a cementitious material, it is desirable to apply a uniform thickness of such material under compacting to the interior surface of the pipe.
A This uniform thickness assures a proper dehydration of the material and its resulting adhesiveness to the interior surface.
To achieve the above, the outer diameter of the slip must conform to the inner diameter of the pipe to be lined, providing the proper clearance therebetween, for the deposit of the cementitious material upon the existing pipe surface.
Thus it is an object of the invention to provide a slip construction that will permit the circumferential adjustment of its body to the required inner diameter of the pipe to be lined, without affecting the functions of the compacting vibrational mechanism within the body.
Another object of this invention is to provide a means for detecting the proper amount of lining mixture to be present at the forward end of the apparatus to assure proper lining conditions.
This means comprises a pair of internal switches having exposed actuators which respond to depressing contact of a yieldably supported cap-like member.
A further object of this invention is to provide an internal rearwardly focused light that will illuminate the finished lining condition of the pipe immediately downstream of the apparatus's operation.
Still another object of this invention is to provide a reduced inwardly directed tapered trailing edge which would permit the apparatus to be retracted in the chimney to be lined when it is found to be necessary to reline a section once the apparatus has passed therebeyond.
Yet another object of this invention is to provide a pipe lining apparatus which is more durable, economical efficient than prior known lining machines of this type.
The above and other object and advantages of the present invention will appear more fully hereinafter from a consideration of the detailed description which follows.