Patents by Inventor Ronald W. Donaldson

Ronald W. Donaldson 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: 8613412
    Abstract: An impact absorbing sign post with quick change-out capability and method is provided. The impact absorbing sign post includes an upper sign post for carrying a sign, an intermediate cylindrical hollow bollard post carrying the upper sign post and a lower hollow bollard post mounted immovably in the ground supporting the intermediate cylindrical hollow bollard post. A easily removable pivot base flexible joint member with a dome portion is mounted between the intermediate cylindrical hollow bollard post and the lower hollow bollard post. A quick change-out spring kit is housed substantially with the lower hollow bollard post in includes a coil spring that is compressed by a tension means such as a cable or chain. When the sign post is impacted by a vehicle and the spring kit is damaged a replacement quick change-out spring kit may be easily installed after removal of the original spring kit without the necessity of removing the lower hollow bollard post from the ground.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: December 24, 2013
    Inventor: Ronald W. Donaldson