Patents by Inventor John S. Mohlengraft

John S. Mohlengraft 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: 5462385
    Abstract: A hand-operated tool for removing and replacing a wide variety of different manhole covers is disclosed. The tool includes a handle which extends upward from slip-resistant feet. A collar with forward extending ears attaches to the lower, central region of the handle. An S-hook is positioned within the ears so that its hook extends downward and frontward, and a clevis is positioned outside the ears. The S-hook, clevis, and ears are all bolted together. One end of a chain attaches to the clevis, and another end of the chain attaches to a link of an elongated link-up unit. The link-up unit's link is dimensioned for snug, but hand-removable, attachment to the S-hook. The snug attachment resists rotation between the link-up unit and the S-hook. A hook pivotably couples to the link-up unit at an opposing end from the link-up unit's link. The hook is coupled so that is can pivot up and down only, and cannot freely rotate around the general direction of elongation of the link-up unit.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: October 31, 1995
    Assignee: GTE California Incorporated
    Inventor: John S. Mohlengraft