Patents by Inventor Fred H. SCHILDWACHTER

Fred H. SCHILDWACHTER 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).

  • Electrically operated door strike with thermally responsive element
    Patent number: 11332960
    Abstract: In one aspect the present invention provides a door strike which prevents the opening of an associated door when the door strike has been heated to an elevated temperature of at least about 1000° F., preferably when the door strike is at higher temperatures such as are present during a fire in a building structure. The door strike includes a thermally responsive element which retards the normal operation of the door strike when it is at an elevated temperature. A further aspect of the invention is a method for controlling the undesired spread of a fire or smoke between adjacent spaces separated by the door wherein a fire or smoke condition exists in at least one of these spaces, via the provision of a door strike having a thermally responsive element which retards the normal operation of the door strike when it is at an elevated temperature.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: May 17, 2022
    Assignee: TRINE ACCESS TECHNOLOGY
    Inventors: Fred H. Schildwachter, Ferdinand E. Orbeta
  • Electrically Operated Door Strike with Thermally Responsive Element
    Publication number: 20190226234
    Abstract: In one aspect the present invention provides a door strike which prevents the opening of an associated door when the door strike has been heated to an elevated temperature of at least about 1000° F., preferably when the door strike is at higher temperatures such as are present during a fire in a building structure. The door strike includes a thermally responsive element which retards the normal operation of the door strike when it is at an elevated temperature.
    Type: Application
    Filed: December 17, 2018
    Publication date: July 25, 2019
    Inventors: Fred H. SCHILDWACHTER, Ferdinand E. ORBETA