Patents by Inventor Robert W. Duench

Robert W. Duench 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).

  • Publication number: 20100193293
    Abstract: A safety system, attached to the underside of an access (lid, cover, grill, grate, or hatch) that allows the user to mount and dismount an access ladder below in an ergonomic and safe manner. The system comprises of a locking device and two handrails attached to the underside of the access cover. The handrails are attached in line with the access ladder handrails. When the access cover is in a vertical open position the locking device slides down into a hollow receiver sleeve that is in a fixed position below the surface of the access cover. This secures the access cover in a vertical open position, allowing the user to utilize the handrails on the underside of the access cover as an extension of the ladder handrails that are affixed below the surface of the access cover.
    Type: Application
    Filed: August 12, 2009
    Publication date: August 5, 2010
    Inventors: Terence Michael Murray, Robert W. Duench, Brad R. Bender, Tim O. Collins