US 4,055,064 AGranted

Muffler and tail pipe expander and cleaner

OwnerVirgle L. Schowinventor

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Abstract

A muffler and tail pipe expander and cleaner has two wedges for spreading a split frame, and with two spiral serrated rollers mounted on each frame. After insertion of the tool in a pipe to be cleaned and expanded, a draw bolt is used to bring the wedges together, to in turn expand the two frame members and upon further turning of the tool, the helical angles of the serrated rollers will cause the tool to screw itself into the pipe and simultaneously remove rust and dents and increase the pipe to its original size.

Claims7

Dependent claims

Apparatus for expanding and cleaning pipes of varying internal diameter, comprising:

cylindrical body means formed of semi-cylindrical segments, the segments each having mounting recesses formed in the outer cylindrical walls thereof and further having expansion recesses formed in each end thereof, and extending longitudinally through the body means to respective communication with each other, resilient means for holding the two segments together;
a cylindrical roller mounted for rotation within each of the mounting recesses, each roller having threads formed on outer cylindrical surfaces thereof, the threads being turned at an angle to the longitudinal axis of the roller;
a wedge member located at each end of the body means and being at least partially received within the expansion recesses, each wedge member having an aperture formed therethrough, one of said apertures being threaded;
and,
an adjusting bolt received through the expansion recesses throughout the body means, the bolt being received through the apertures in each wedge member, at least one end of the bolt being threaded and being received within the threaded aperture in one of the wedge members, the bolt having a flanged head at the other end thereof, and a biasing member having an aperture formed therein, the bolt being received within the aperture, the biasing member lying between and being contiguous to the head of the bolt and the outer end of the other of the wedge members, the bolt being rotatable after insertion of the end of the assembly opposite the head of the bolt into an open end of a pipe to bias the wedge members toward each other, thereby displacing the segments of the body means towards the internal surfaces of the pipe to cause the threads on the rollers to engage said internal pipe surfaces, the biasing member then being rotatable in a plane parallel to the longitudinal axis of the body means and of that portion of the pipe in which at least a portion of the body means is disposed, thereby to cause the body means to rotate, the rollers also rotating and causing the angled threads thereon to cut into the internal pipe surfaces and to cause the body means to be displaced inwardly of the pipe.

2 more elements

Dependencies are inferred from the claim text.

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Abstract

Apparatus for expanding and cleaning pipes of varying internal diameter, comprising:

cylindrical body means formed of semi-cylindrical segments, the segments each having mounting recesses formed in the outer cylindrical walls thereof and further having expansion recesses formed in each end thereof, and extending longitudinally through the body means to respective communication with each other, resilient means for holding the two segments together;
a cylindrical roller mounted for rotation within each of the mounting recesses, each roller having threads formed on outer cylindrical surfaces thereof, the threads being turned at an angle to the longitudinal axis of the roller;
a wedge member located at each end of the body means and being at least partially received within the expansion recesses, each wedge member having an aperture formed therethrough, one of said apertures being threaded;
and,
an adjusting bolt received through the expansion recesses throughout the body means, the bolt being received through the apertures in each wedge member, at least one end of the bolt being threaded and being received within the threaded aperture in one of the wedge members, the bolt having a flanged head at the other end thereof, and a biasing member having an aperture formed therein, the bolt being received within the aperture, the biasing member lying between and being contiguous to the head of the bolt and the outer end of the other of the wedge members, the bolt being rotatable after insertion of the end of the assembly opposite the head of the bolt into an open end of a pipe to bias the wedge members toward each other, thereby displacing the segments of the body means towards the internal surfaces of the pipe to cause the threads on the rollers to engage said internal pipe surfaces, the biasing member then being rotatable in a plane parallel to the longitudinal axis of the body means and of that portion of the pipe in which at least a portion of the body means is disposed, thereby to cause the body means to rotate, the rollers also rotating and causing the angled threads thereon to cut into the internal pipe surfaces and to cause the body means to be displaced inwardly of the pipe.

2 more elements