Patents Assigned to James C. Vail
  • Tillage point
    Patent number: 4813491
    Abstract: A tillage point for attachment to an excavating or earthmoving apparatus includes a tapered point extending below its longitudinal axis and formed by a convex top surface and concave bottom surface when viewed in side elevation. A convex protuberance axially extending along the bottom surface, combined with the tapered point permits enhanced soil penetration with reduced drag and friction.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: March 21, 1989
    Assignee: James C. Vail
    Inventor: Dennis M. Gross