Patents by Inventor Ove Hammarstrand

Ove Hammarstrand 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: 7380506
    Abstract: The present invention relates to an arrangement for gripping and releasing a plurality of sleepers intended for a railroad section with the aid of a unit, the arrangement including means for spacing adjacent units equidistantly. The means includes frame-associated and centrally pivotal arms whose outer portions co-act pivotally with one end of a respective brace or link whose other ends are pivotally fastened to a respective outer unit, wherein the central regions of the arms are pivotally fastened to one end of a respective brace or link whose other ends are pivotally fastened to a respective intermediate unit.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: June 3, 2008
    Assignee: Rosenqvist Gruppen AB
    Inventor: Ove Hammarstrand
  • Publication number: 20070003402
    Abstract: The present invention relates to an arrangement for gripping and releasing a plurality of sleepers intended for a railroad section with the aid of a unit, the arrangement including means for spacing adjacent units equidistantly. The means includes frame-associated and centrally pivotal arms whose outer portions co-act pivotally with one end of a respective brace or link whose other ends are pivotally fastened to a respective outer unit, wherein the central regions of the arms are pivotally fastened to one end of a respective brace or link whose other ends are pivotally fastened to a respective intermediate unit.
    Type: Application
    Filed: May 10, 2004
    Publication date: January 4, 2007
    Applicant: ROSENQVIST GRUPPEN AB
    Inventor: Ove Hammarstrand
  • Patent number: 6283883
    Abstract: A power transmission system includes a rotatable and drivable first shaft (1a) adapted for co-action with a motor (1c) included in a planetary gear arrangement (P), and further includes a second shaft (8) that can be driven by the planetary gear arrangement. The planetary gear arrangement (1) includes a centrally positioned sun gear (1b) that co-acts with said first shaft, a plurality of planet gears (1d) that can co-act with the sun gear, and a ring gear (1e) that co-acts with the planet gears, and a gear or wheel (1f) that holds the planet gears. A hydraulic system (10) belonging to the planetary gear arrangement (P) includes a pump unit (10a) and a motor unit (10b) among other things. The ring gear (1e) can be braked via a first coupling unit (3), so as to be stationary in relation to a chassis (4) in a low speed range, but free for rotation in a higher speed range. The first shaft (1a) functions to cause the sun gear (1b) to rotate.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: September 4, 2001
    Inventor: Ove Hammarstrand
  • Patent number: 4046026
    Abstract: A linkage and motion system pivoted to a bracket comprises a first linkage connecting the bracket with a second linkage, a holder connected to the bracket and to the second linkage, and a drive with a linear working motion connected to the bracket. The articulated connection of the drive to the bracket is spaced from that of the holder thereto, the articulated connections of the second linkage to the holder, the first linkage and the drive define a triangle, and the articulated connection of the first linkage to the bracket and that of the drive thereto are on either side of the articulated connection of the holder to the bracket.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: September 6, 1977
    Assignee: Sveska Hymas Aktiebolag
    Inventor: Sten Ove Hammarstrand
  • Patent number: 3976302
    Abstract: The invention disclosed relates to a new improved pivoting axle system especially useful for terrain vehicles.
    Type: Grant
    Filed: December 4, 1974
    Date of Patent: August 24, 1976
    Inventor: Sten Ove Hammarstrand
  • Patent number: 3942322
    Abstract: A percussion tool is hydraulically operated by a piston whose stroke is controlled by a spring biased valve. A pressure accumulator is connected to the working pressure chamber of a hydraulic cylinder and receives pressure therefrom during the return stroke of the piston while discharging pressure during the working stroke. A piston is displaceably mounted in the pressure accumulator for movement into an end position when the pressure is discharged and a second valve is actuated by the piston in the end position to control the spring biased valve.The invention refers to an improvement in hydraulic percussion tools.Hydraulic percussion tools, for rock drilling, breaking or the like of known construction have a reciprocating working piston in a cylinder, driven by a pressure liquid, usually hydraulic oil, during the reciprocating movement.
    Type: Grant
    Filed: October 18, 1974
    Date of Patent: March 9, 1976
    Assignee: Svenska Hymas Aktiebolag
    Inventor: Sten Ove Hammarstrand