Patents by Inventor Sigvard O. Hallgren

Sigvard O. Hallgren 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: 5993146
    Abstract: A tub-like member is recessed below floor surface level in a pit and carries therein an extendable and retractable lifting mechanism. The tub includes a horizontal outwardly extending flange essentially at floor surface level, and overlying the floor surface, which a loader/unloader may easily manipulate with foot pressure to rotate the tub and stacked articles on a pallet carried on the lifting mechanism within the tub-like member. Easily operable controls are provided for the loader/unloader to incrementally raise and lower the lifting mechanism to present the top article of a stack on a pallet at a comfortable lifting height. Also included is a new and improved mechanism for supporting a pallet for manual rotation and incrementally controlled vertical movement.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: November 30, 1999
    Assignee: Blakesle Arpia Chapman
    Inventor: Sigvard O. Hallgren