Patents by Inventor David H. Cunningham

David H. Cunningham 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: 6772616
    Abstract: A forming machine receives an elongated sheet of formable material to form a desired profile has a rigid framework supporting a sheet drive that includes a plurality of pairs of co-acting rollers to advance the sheet through the framework from an upstream entrance to a downstream exit. A drive assembly interconnects at least one roller in each of the pairs to rotatably drive the roller and advance the sheet in the downstream direction. Each of a plurality of carriage rails extends transversely along the framework and has first and second carriage mounts slideably disposed thereon. First and second tool rails are secured, respectively, to each of the first and second carriage mounts permitting the tooling rails to move laterally within the framework. Each tooling rail supports a plurality of forming elements defining at least two forming stations to bend the sheet as desired while it advances through the framework.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: August 10, 2004
    Assignee: New Tech Machinery
    Inventors: David H. Cunningham, Bruce E. Meyer
  • Publication number: 20030094027
    Abstract: A forming machine receives an elongated sheet of formable material to form a desired profile has a rigid framework supporting a sheet drive that includes a plurality of pairs of co-acting rollers to advance the sheet through the framework from an upstream entrance to a downstream exit. A drive assembly interconnects at least one roller in each of the pairs to rotatably drive the roller and advance the sheet in the downstream direction. Each of a plurality of carriage rails extends transversely along the framework and has first and second carriage mounts slideably disposed thereon. First and second tool rails are secured, respectively, to each of the first and second carriage mounts permitting the tooling rails to move laterally within the framework. Each tooling rail supports a plurality of forming elements defining at least two forming stations to bend the sheet as desired while it advances through the framework.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 22, 2003
    Inventor: David H. Cunningham
  • Publication number: 20020108421
    Abstract: A forming machine for receiving an elongated sheet of formable material to form a desired profile has a rigid framework supporting a sheet drive that includes a plurality of pairs of co-acting rollers to advance the sheet through the framework from an upstream entrance to a downstream exit. A drive assembly interconnects at least one roller in each of the pairs to rotatably drive the roller and advance the sheet in the downstream direction. Each of a plurality of carriage rails extends transversely along the framework and has first and second carriage mounts slideably disposed thereon. First and second tool rails are secured, respectively, to each of the first and second carriage mounts permitting the tooling rails to move laterally within the framework. Each tooling rail supports a plurality of forming elements defining at least two forming stations to bend the sheet as desired while it advances through the framework.
    Type: Application
    Filed: February 13, 2001
    Publication date: August 15, 2002
    Inventor: David H. Cunningham
  • Patent number: 5740687
    Abstract: A forming apparatus for forming a selected profile in a sheet of material includes a frame, a sheet drive to advance the sheet of material through the frame, a drive assembly for powering the sheet drive, forming rollers to configure the sheet into the desired profile and a shear assembly to cut the formed sheet into desired lengths. The sheet drive includes pairs of coacting rollers with each pair comprising a driven roller connected to the drive assembly and a free-wheeling roller that is adjustably mounted relative to its associated driven roller. The shear assembly has a housing that movably mounts a pair of opposed blade mounts that have facing channels which receive lateral edges of a blade. These channels are wider than the blade thickness so that the blade freely floats and is thus self-aligning between dies.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: April 21, 1998
    Assignee: New Tech Machinery Corporation
    Inventors: Bruce E. Meyer, David H. Cunningham, Ronald W. Shell