Patents by Inventor Jon C. Lian

Jon C. Lian 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).

  • Carbon dioxide welding gun
    Patent number: 4978831
    Abstract: The present invention relates to an improved carbon dioxide welding gun which is equipped with a two-piece bushing mechanism where a welding rod guide member is easily detached or inserted into operative condition in an efficient manner. The two-piece bushing mechanism includes a front conical tip member and a rear support member which are releasably secured each to the other by means of threaded sections. In this manner, the welding gun of the subject invention concept prevents accumulation of carbon residues so that the service life of the overall system is extended.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: December 18, 1990
    Inventor: Jon C. Lian
  • Carbon dioxide welding gun
    Patent number: 4945208
    Abstract: The present invention relates to an improved carbon dioxide welding gun which is equipped with a two-piece bushing machanism (50) where a welding nozzle (10) is easily detached or inserted into operative condition in an efficient manner. The two-piece bushing mechanism (50) includes a front conical head (52) and a rear conduit member (51) which are releasably secured each to the other by means of threaded sections. In this manner, the welding gun of the subject invention concept prevents accumulation of carbon residues so that the service life of the overall system is extended.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: July 31, 1990
    Inventor: Jon C. Lian