Patents by Inventor Wallace M. Colligan

Wallace M. Colligan 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: 4347450
    Abstract: A portable power tool includes an elongate body portion and a head portion at one end which includes an implement holding chuck. The head portion may be pivotally displaced with respect to the body portion. This is accomplished by the use of a swivelable joint of the ball and socket type between the body portion and the head portion and by an angular coupling in a driving connection between an electric motor in the body portion and the chuck in the head portion. The body portion includes a hand gripping portion of such girth as to provide a comfortable and secure grip by a human hand. The electric motor is disposed within a region of the body portion comprising the hand portion. The electric motor may be driven by a battery.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: August 31, 1982
    Inventor: Wallace M. Colligan