Patents Assigned to Design Engineering Service Inc.
  • Patent number: 5189749
    Abstract: A multipurpose tool for maintaining hunting arrows is disclosed. The tool is a sharpener capable of sharpening broadheads, a wrench capable of tightening or loosening broadheads screwed onto an arrow, and a dresser capable of dressing the fletched end of an arrow so that the arrow effectively will receive a nock. The tool has an elongated body with integral longitudinal ridges to enhance its appearance and to facilitate gripping, and is preferably molded of ABS plastic in two pieces. The sharpener and wrench are at the bottom, and the dresser is at the top of the tool. The sharpener comprises a shallow channel running diagonally across the face of the bottom, normal to the axis of the tool, with a plurality of small hard rods imbedded in the sides of the groove. Sharpening is effected by movement of the edge of a broadhead along the shallow groove.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: March 2, 1993
    Assignee: Thomas Design & Engineering Services, Inc.
    Inventors: Bruce A. Thomas, Mark A. Smith, Mark T. Birchmeier, Lawrence D. Reiber
  • Patent number: 4557881
    Abstract: A machine for molding sheets of foamed material includes an upright stationary steam chest having opposing perforated external faces, and a pair of movable assemblies abuttable with the opposite faces of the steam chest to define mold cavities therewith. Each cavity forming assembly includes a mold frame extending normal to a face of the steam chest, and a platen positioned within and coupled to the mold frame. Jackscrews move each mold frame into and out of abutment with the steam chest, and also move each platen relative to its respective mold frame toward and away from the steam chest. A method of molding sheets of foamed material is also disclosed wherein heated polystyrene beads are squeezed by the movable platens to a predetermined thickness to provide a board having the desired dimensions and density.
    Type: Grant
    Filed: April 6, 1984
    Date of Patent: December 10, 1985
    Assignee: Design Engineering Service, Inc.
    Inventor: John Rabotski
  • Patent number: 4456443
    Abstract: A machine for molding sheets of foamed material includes an upright stationary steam chest having opposing perforated external faces, and a pair of movable assemblies abuttable with the opposite faces of the steam chest to define mold cavities therewith. Each cavity forming assembly includes a mold frame extending normal to a face of the steam chest, and a platen positioned within and coupled to the mold frame. Jackscrews move each mold frame into and out of abutment with the steam chest, and also move each platen relative to its respective mold frame toward and away from the steam chest. A method of molding sheets of foamed material is also disclosed wherein heated polystyrene beads are squeezed by the movable platens to a predetermined thickness to provide a board having the desired dimensions and density.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: June 26, 1984
    Assignee: Design Engineering Service Inc.
    Inventor: John Rabotski