Patents by Inventor Karl Anders Rosenquist

Karl Anders Rosenquist 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: 6220169
    Abstract: The invention relates to a method of placing, positioning and fastening railroad sections on railroad rail sections (1) on a number of mutually adjacent and mutually spaced, loose railroad sleepers (2a, 2b), with the aid of a pulling vehicle (7) which functions to pull a rail section (1) from a first railroad wagon (4) into abutment with said sleepers, via a second railroad wagon (5). Rail sections (1) pulled from the wagon by said vehicle (7) are moved linearly at a distance (a) above the sleepers (2a, 2b) with the aid of a number of devices (10, 10a, 10b). This linear movement is adapted so that the trailing end-surface (1′) of the pulled rail section will be positioned adjacent a leading end-surface (1″) of an earlier laid rail section. In this position of the rail section, one or more of said devices (10, 10a, 10b) is/are activated to lower the rail section (1) onto rail-adapted, sleeper-associated fastener elements (81-84).
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: April 24, 2001
    Assignee: A.Rosenquist Förvaltnings AB
    Inventors: Karl Anders Rosenquist, Erne Holmberg, Per Olof Ohlsson