Patents by Inventor Earl B. Lambert

Earl B. Lambert 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).

  • Security bar system for louvered window units
    Patent number: 4694608
    Abstract: An improved security bar system for louvered windows is disclosed. The window unit has louvered blades which pivot on horizontal stub shafts.The security bars are mounted on the stub shafts where the louver blades hide them from view and provide an esthetically pleasing window unit. Each security bar has a hardened steel rod with holes bored in each end for receiving the stub shafts and a hardened steel sleeve which freely rotates on the steel rod and covers the rod and stub shafts. The steel rod freely rotates on the stub shafts which are themselves freely rotatable. Therefore, any attempts to cut the security bar will cause the steel sleeve to rotate. Should the steel sleeve be held stationary and cut, the covered steel rod will rotate due to the action of the saw blade.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: September 22, 1987
    Inventor: Earl B. Lambert