Patents by Inventor Edward M. Croswell

Edward M. Croswell 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: 6412325
    Abstract: A method for prototyping parts from a sheet metal blank in which the sheet metal has at least two spaced edges. The method includes the step of forming a plurality of longitudinally aligned slots through the sheet metal blank to form a bend line extending between two spaced edges on the sheet metal blank. The slots are preferably formed by laser cutting. The sheet metal blank is then bent along the bend line to form the prototype.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: July 2, 2002
    Assignee: 3 Dimensional Services
    Inventor: Edward M. Croswell
  • Patent number: 6164895
    Abstract: A lifting attachment is disclosed for use in conjunction with a trailer hitch mounted to a vehicle. The lifting attachment includes a support assembly which is detachably connected to the trailer hitch and this support assembly includes a vertically extending support beam. The attachment includes a platform having a generally planar top and an elongated arm having one end pivotally connected to the platform and a second end pivotally connected to the support beam. A hydraulic piston and cylinder assembly is pivotally connected between the support beam and an intermediate point on the arm so that extension and retraction of the piston within the cylinder selectively raises and lowers the platform.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: December 26, 2000
    Inventor: Edward M. Croswell