Patents by Inventor Robert A. Messinger

Robert A. Messinger 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).

  • Fully rotatable vacuum lift with self contained utility lines
    Patent number: 5221117
    Abstract: An auxiliary energy source is connected to the manually operated lift head of a vacuum lift system for connection of an accessory. Thus, electrical or compressed air energy is made conveniently available to power a load rotating accessory, a clamp, or the like, preferably by means of feeding a conduit line coaxially within the flexible tubing of the lift system. This is particularly useful to prevent interference or disarray of an auxiliary line that must be manipulated in tandem with the lift head, and is operable with rotary type lift systems that permit 360 degree rotation of the lift head.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: June 22, 1993
    Inventors: Robert A. Messinger, David L. Seelig