Patents by Inventor Ingval Johansson

Ingval Johansson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Weld sander
    Patent number: 4483106
    Abstract: A weld sander for smoothing the surface of a weld which joins lengths of pipe. The weld sander has a carriage which travels around the pipe and movably mounts a head carrying a grinding belt, with the belt mounted for movement toward and away from the weld and also for tilting movement. Pipe followers, associated with the head, control the minimum distance of the belt from the pipe sections and, additionally, establish a minimum distance between an edge of the belt and a pipe to prevent engagement between the belt and a pipe when the belt tilts.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: November 20, 1984
    Assignee: The E. H. Wachs Company
    Inventors: Edward H. Wachs, Ingval Johansson