Patents by Inventor Jens Christian Krogsrud

Jens Christian Krogsrud 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: 4080530
    Abstract: An equapoised lamp comprising a lamp head mounted upon an arm assembly which is counterbalanced by springs enclosed within square tubes which are components of the arm assembly. The arm assembly has a lower pair of parallel arms which are pivoted at their lower ends to a swivel bracket which turns about a vertical axis in a fixed bracket. Each of those arms is pivoted at its upper end to a floating bracket which has pivoted to it a similar upper pair of parallel arms. A lamp assembly is mounted upon the other end of the upper pair of arms by a universal joint assembly. The arms are tubular, and each pair forms a parallelogram by virtue of the pivotal connections with the respective brackets. A coil spring is enclosed within one of each pair of tubes which exerts a counterbalancing effect upon its pair of arms. A nylon shoe is mounted upon the free end of each spring and enclosed within the tube. The shoe transmits the counterbalancing force from the spring to the adjacent bracket.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: March 21, 1978
    Inventor: Jens Christian Krogsrud