Patents by Inventor Gordon Kasper

Gordon Kasper 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).

  • Vacuum relief and access door assembly
    Patent number: 4184509
    Abstract: A vacuum relief and access door assembly, for use on a duct downstream of a fire or control dampers, comprises a frame including a duct facing surface with a seal member thereon, a closure member having side edges in sealing engagement with the seal member, and cooperative retaining members mounted on the frame and closure member and resiliently urging the closure member into sealing engagement with the seal member, yielding to allow the closure member to displace toward the duct to allow air flow thereby for vacuum relief and returning into sealing engagement with the seal member said retaining members being releasable for removal of said closure member.
    Type: Grant
    Filed: November 1, 1978
    Date of Patent: January 22, 1980
    Assignee: Ruskin Manufacturing Company
    Inventor: Gordon Kasper