Patents Assigned to Groko Maskin AB
  • Patent number: 4580433
    Abstract: This invention relates to the bending of shaped sheet metal, which shows alternatingly occurring longitudinal ridges and valleys, the lateral portions of which constitute lateral portions of the ridges, about an axis, which extends perpendicularly to the longitudinal direction of the ridges and valleys and is in parallel with the plane of the sheet. Known methods of bending such shaped sheet metal have proved to have certain limitations with respect to applicability and smallest bending radius to be obtained in one or more coherent bending moments or steps. For eliminating these shortcomings a method of bending shaped sheet metal is proposed, at which the bending takes place in at least two subsequent moments or steps.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: April 8, 1986
    Assignee: Groko Maskin AB
    Inventor: Seard Aberg
  • Patent number: 4449388
    Abstract: This invention relates to the bending of shaped sheet metal, which shows alternatingly occurring longitudinal ridges and valleys, the lateral portions of which constitute lateral portions of the ridges, about an axis, which extends perpendicularly to the longitudinal direction of the ridges and valleys and is in parallel with the plane of the sheet. Known methods of bending such shaped sheet metal have proved to have certain limitations with respect to applicability and smallest bending radius to be obtained in one or more coherent bending moments or steps. For eliminating these shortcomings a method of bending shaped sheet metal is proposed, at which the bending takes place in at least two subsequent moments or steps.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: May 22, 1984
    Assignee: Groko Maskin AB
    Inventor: Seard Aberg
  • Patent number: 4424752
    Abstract: This invention relates to a loading pallet. Conventional pallets of wood show deficiencies with respect to durability and service life.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: January 10, 1984
    Assignee: Groko Maskin AB
    Inventor: Seard Aberg
  • Patent number: 4347726
    Abstract: The invention relates to a method and a device for bending sheet-metal sections. It is previously known to bend sectional sheets, but the known art involves certain problems to bring about a non-angular bend with a small radius and without damaging the sheet. According to the invention it is proposed for eliminating said problems, that in connection with the impressing of the sheet portions located closest to the bending axis the lateral portions (1c; 32c; 50c) of the sheet are subjected to an outwardly directed force (17; 39; 56) or prestressing in a plane through the impressions (34; 59), in order to form an outward bulging (40; 58) in the lateral portions (1c; 32c; 50c) and on the same side of the sheet as the impressions (34, 59).
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: September 7, 1982
    Assignee: Groko Maskin AB
    Inventor: Gustav Naslund
  • Patent number: 4220031
    Abstract: A corrugated metal sheet is incrementally bent perpendicularly with respect to its corrugations, by repeatedly transversely indenting upwardly the bottoms of the corrugation valleys so that the indentations extend in lines transversely across the sheet and extend into the corrugation sides which interconnect the valleys and ridges of the sheet. Each line of indentation causes the sheet to bend to some degree without detrimental stretching or drawing of the sheet.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: September 2, 1980
    Assignee: Groko Maskin AB
    Inventor: Gustav Naslund