Patents by Inventor Morris S. Durnell

Morris S. Durnell 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).

  • Aerial personnel lift including means for automatically controlling the position of the personnel bucket
    Patent number: 4116304
    Abstract: An aerial lift comprising a wheeled frame having a telescoping boom pivotally and rotatably mounted thereon. A personnel bucket is pivotally secured to one end of the boom for supporting a person therein. An electrical screw-motor apparatus is pivotally secured to and extended between the bucket and the boom. A plurality of mercury switches are mounted on the bucket and are electrically connected to the screw-motor and the source of electrical power so that the screw-motor is automatically actuated responsive to vertical movement of the boom so as to maintain the personnel bucket in a vertical position at all times. The screw-motor also acts as a snubber to prevent undesirable movement of the bucket at work levels.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: September 26, 1978
    Assignee: Durnell Engineering, Inc.
    Inventor: Morris S. Durnell