Patents by Inventor Sture R. Hall

Sture R. Hall 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: 4260307
    Abstract: A work table for machine tools such as pillar-type drills and the like comprising a substantially horizontal plate forming a work surface through which are cut a plurality of longitudinal or radially extending grooves. A flange depending from the peripheral edge of the horizontal plate is supported on a base plate and is provided with a plurality of vertical openings aligned with the grooves in the work surface. A clamping plate is mounted to move vertically beneath the work surface within a space defined by said flange and said base plate and is also provided with grooves arranged in alignment with the grooves in the work surface. The clamping plate is connected to power transmission means which allows the clamping plate to be moved into positions which are inclined relative to the work surface.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: April 7, 1981
    Inventors: Sven-Mikael Mickelsson, Sture R. Hall
  • Patent number: 4257340
    Abstract: Seeding apparatus for use in connection with tractor-drawn seeding equipment, particularly reforesting equipment, comprising an inclined tubular member having one end pivotally connected to a thatching device or similar soil-breaking device at an elevated distance above the ground so as to yield returnably against torque in vertical and horizontal direction. The other end of the tubular member is provided with a terminal portion extending generally parallel to the ground and carries a tamping device for smoothing out and slightly compacting the seed bed. The seeds are ejected pneumatically at the rear of the tamping device through a seed conveyor channel or seed drill, extending through the inclined tubular member and connected at one end to a seed hopper carried by the tractor, and, at the other end, to a pneumatic ejector device in the terminal portion of the tubular member. Mulch to cover the planted seeds is supplied through conduits housed within the tubular member.
    Type: Grant
    Filed: November 15, 1978
    Date of Patent: March 24, 1981
    Assignee: AB Issesunds Bruk
    Inventors: Seve-Mikael Mickelsson, Sture R. Hall