Patents by Inventor Thomas E. Shaffer

Thomas E. Shaffer 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: 6084186
    Abstract: A safety residential lever arm switch which can only be thrown when the lever arm is first depressed. In an electrical switch of the type having a front housing having a central frontal opening, a lever arm positioned within the front housing and projecting through the frontal opening, and a rear housing having a front side portion adapted to mate with the front housing, a safety feature comprising: structure requiring an outward end portion of the lever arm to be pushed inwardly before it can be pivoted so that a user may, with a single hand, first depress the lever arm, and then pivot the lever arm between on and off position. A button end portion of a shaft extending from an outward end portion of the lever arm is first depressed. Alternatively, the lever arm in its entirety is depressed inwardly so that the switch can then be thrown.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: July 4, 2000
    Inventor: Thomas E. Shaffer