Patent ID: 9724789
Date: 2017-08-08
CPC Classifications: B23K,B60B,B60Y

Claim:
1. A mobile welder adapted to move along a work piece, the mobile welder comprising: a chassis; a travel assembly attached to the chassis and adapted to support the chassis over a portion of the work piece; a motor assembly supported on the chassis and coupled to the travel assembly to selectively cause the chassis to move relative to the work piece; a controller connected to the motor assembly to control movement of the chassis relative to the work piece; a chassis holder connected to the chassis, the chassis holder being adapted to provide a force holding the chassis a selected distance from the work piece, wherein the chassis holder comprises at least one magnet assembly, and wherein the at least one magnet assembly includes a magnet rotatatably mounted between a ferrous material and a non-ferrous material to selectively control application of a magnetic field toward the workpiece; and a welder supported on the chassis, the welder including an implement adapted to perform a welding operation.