Patents by Inventor Frederick J. Arnoldt

Frederick J. Arnoldt 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).

  • Apparatus for connecting the ends of a pair of oval duct sections
    Patent number: 5135270
    Abstract: Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections that are connected to each other by connector pieces having leg portions extending into receivers in the profile of the frame sections. The connector pieces have stop members which abut the edges of the frame sections and provide a gap therebetween. The lower stop member is offset rearwardly from the body portion of the connector piece and the edge portion of the oval duct extends outwardly into the gap portion. The oval duct end portions are connected to the duct connector frame members and pairs of frame members are positioned in adjacent relation with a gasket member therebetween. The connecting members include a securing device to secure the adjacent frame members to each other and exert a compressive force on the gasket member therebetween.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: August 4, 1992
    Assignee: Ductmate Industries, Inc.
    Inventors: Peter J. Arnoldt, Frederick J. Arnoldt
  • Apparatus for connecting the ends of a pair of oval duct sections
    Patent number: 5129690
    Abstract: Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections or a pair of frame sections with a linear portion and a pair of semi-circular end portions. The sections are connected to each other by connector pieces having leg portions extending into receivers in the profile of the frame sections. The connector pieces have stop members which abut the edges of the frame sections and provide a gap therebetween. The lower stop member is offset rearwardly from the body portion of the connector piece and the edge portion of the oval duct extends outwardly into the gap portion. The oval duct end portions are connected to the duct connector frame members and pairs of frame members are positioned in adjacent relation with a gasket member therebetween. The connecting members include a securing device to secure the adjacent frame members to each other and exert a compressive force on the gasket member therebetween.
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: July 14, 1992
    Assignee: Ductmate Industries, Inc.
    Inventors: Manfred Meinig, Peter J. Arnoldt, Frederick J. Arnoldt
  • Method for connecting the ends of a pair of oval duct sections
    Patent number: 5103549
    Abstract: Apparatus for connecting the ends of a pair of oval duct sections includes a pair of arcuate frame sections and a pair of linear intermediate frame sections or a pair of frame sections with a linear portion and a pair of semi-circular end portions. The sections are connected to each other by connector pieces having leg portions extending into receivers in the profile of the frame sections. The connector pieces have stop members which abut the edges of the frame sections and provide a gap therebetween. The lower stop member is offset rearwardly from the body portion of the connector piece and the edge portion of the oval duct extends outwardly into the gap portion. The oval duct end portions are connected to the duct connector frame members and pairs of frame members are positioned in adjacent relation with a gasket member therebetween. The connecting members include a securing device to secure the adjacent frame members to each other and exert a compressive force on the gasket member therebetween.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: April 14, 1992
    Assignee: Ductmate Industries, Inc.
    Inventors: Manfred Meinig, Peter J. Arnoldt, Frederick J. Arnoldt