Patents by Inventor Einar Karlsson

Einar Karlsson 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: 7350612
    Abstract: A shock-absorbing hydraulic system for cushioning a structural part of an all-terrain load-carrying vehicle, said hydraulic system having a first, hydraulic front cylinder and a first, hydraulic rear cylinder (1, 2) being connected in series and being arranged on one side of the longitudinal axis of the load-carrying vehicle, and a second, hydraulic front cylinder and a second hydraulic, rear cylinder (3, 4) being connected in series and being arranged on the other side of the longitudinal axis of the load-carrying vehicle, wherein each of the hydraulic cylinders exhibits a first end (5) and a second end (6) and is arranged between the structural part and the chassis of the load-carrying vehicle. According to the invention, the first end of the first, hydraulic front cylinder is connected to the second end of the second, hydraulic rear cylinder, and the second end of the first, hydraulic rear cylinder is connected to the first end of the second, hydraulic front cylinder.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: April 1, 2008
    Assignee: Hultdin System AB
    Inventor: Einar Karlsson
  • Publication number: 20050230888
    Abstract: A shock-absorbing hydraulic system for cushioning a structural part of an all-terrain load-carrying vehicle, said hydraulic system having a first, hydraulic front cylinder and a first, hydraulic rear cylinder (1, 2) being connected in series and being arranged on one side of the longitudinal axis of the load-carrying vehicle, and a second, hydraulic front cylinder and a second hydraulic, rear cylinder (3, 4) being connected in series and being arranged on the other side of the longitudinal axis of the load-carrying vehicle, wherein each of the hydraulic cylinders exhibits a first end (5) and a second end (6) and is arranged between the structural part and the chassis of the load-carrying vehicle. According to the invention, the first end of the first, hydraulic front cylinder is connected to the second end of the second, hydraulic rear cylinder, and the second end of the first, hydraulic rear cylinder is connected to the first end of the second, hydraulic front cylinder.
    Type: Application
    Filed: August 26, 2003
    Publication date: October 20, 2005
    Applicant: Hultdin System AB
    Inventor: Einar Karlsson
  • Patent number: 4295507
    Abstract: Apparatus for delimbing and barking trees or tree parts comprising a downwardly tapering trough for receiving the trees or tree parts, the trough having a generally horizontal axis and having one side formed by an upwardly and outwardly inclined endless conveyor which includes drivers projecting therefrom for circulating the trees or tree parts in the trough and for transporting wood upwardly; at least one elongated delimbing roll arranged parallel to the axis of the trough at the bottom thereof, the roll being adjacent the lower end of the conveyor and rotatable in a direction such that its upper surface rotates toward the conveyor; and at least one elongated barking roll arranged in side-by-side parallel relationship to the delimbing roll on the side thereof opposite the conveyor and rotatable in a direction such that its uper surface rotates toward the delimbing roll, the barking roll having longitudinally extending planar peripheral ribs for orienting the stems of the trees or tree parts into parallelism
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: October 20, 1981
    Inventor: Einar Karlsson
  • Patent number: 3938380
    Abstract: A hydraulic load-sensing device disposed between a load carrying device in the form of a lifting hook and a hoist in the form of a crane jib includes a single-acting hydraulic piston and cylinder unit, the cylinder component being connected to the hoist jib and the piston component being connected to the lifting hook in such manner that as the hoist jib is raised in order to raise the load carried by the hook, a corresponding pressure is exerted on the hydraulic medium between the piston and the lower end of the cylinder and this pressure is transmitted from the cylinder through a line to a pressure gage which measures and exhibits the combined dead weight of the hook and its load.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: February 17, 1976
    Inventor: Einar Karlsson