Patents by Inventor John Leimgruber

John Leimgruber 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).

  • Patent number: 4659096
    Abstract: A carriage device providing a base structure having a frame with a pair of parallel tubular members and front and rear cross members extending between and secured therewith to provide a rectangular configuration, and wheel means for movably supporting the base structure having a folded position proximate to the base structure and an extended operative position. Handle means provide for the base structure is movable between a folded position proximate to the base structure and an extended position away from the base structure, and wheel positioning means comprise a pair of elongated rod elements each received and enclosed within a respective one of the tubular members are rotatable for moving the wheel means between their extended and folded positions by the corresponding movement of the handle means. Locking means engage the rod elements of the wheel positioning means for automatically locking the wheel positioning means against movement when the wheel means is either in its extended or folded positions.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: April 21, 1987
    Inventor: John Leimgruber