Patents by Inventor Jens C. Krogsrud

Jens C. 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: 4846434
    Abstract: A spring counterbalanced arm assembly including a base member, a lower arm, an upper arm, a knee bearing member and object supporting means. The lower arm has an elongated, generally tubular member defining an elongated cavity therein. The base end of the tubular member includes means defining a forwardly extending bracket and has pivot means thereon positioned forwardly of an exterior front wall of the tubular member for pivotally connecting the base end bracket of the lower arm to the base member at a first pivot axis of the base member. The knee end of the tubular member includes a forwardly extending bracket having pivot means thereon positioned forwardly of the exterior front wall for pivotally connecting the knee end of the lower arm to a knee end of an upper arm and to the knee bearing member at a first pivot axis of the knee bearing member. The lower arm includes a slider and tension spring enclosed within it to provide counterbalancing force.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: July 11, 1989
    Assignee: Jac Jacobsen Industrier A.S.
    Inventor: Jens C. Krogsrud
  • Patent number: 4683526
    Abstract: An asymmetric lamp with an improved reflector assembly is disclosed. The lamp includes a head, a socket for receiving a light bulb, and a front reflector. The socket and the front reflector are mounted in the head. When the light bulb is inserted into the socket, the light bulb defines a transverse axis. The front reflector has a longitudinal cross-sectional shape that is either generally hyperbolic, generally parabolic, or generally elliptic. The front reflector is formed from a plurality of triangular facets. Adjacent facets define a line that is nonparallel to the transverse axis defined by the light bulb. The front reflector is mounted in the head so that the rear edge of the front reflector is positioned proximate the top of the light bulb. The lamp may include a back reflector, preferably made from a nonconductive material. The back reflector is positioned proximate the rear edge of the front reflector.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: July 28, 1987
    Assignee: Jac Jacobsen A/S
    Inventors: Jens C. Krogsrud, Kai O. Sorensen
  • Patent number: 4298921
    Abstract: An electric lamp which provides substantially uniform lighting throughout a work area. The area extends from directly under the lamp a substantial distance beyond the shade. A faceted reflector provides the desired distribution of the light.
    Type: Grant
    Filed: October 23, 1979
    Date of Patent: November 3, 1981
    Assignee: Jac. Jacobsen A/S
    Inventors: Jens C. Krogsrud, Kai O. Soerensen
  • Patent number: 4280172
    Abstract: An electric lamp which provides substantially uniform lighting throughout a work area. The area extends from directly under the lamp a substantial distance beyond the shade. A faceted reflector provides the desired distribution of the light.
    Type: Grant
    Filed: October 31, 1979
    Date of Patent: July 21, 1981
    Inventor: Jens C. Krogsrud
  • Patent number: 4160536
    Abstract: An equapoised arm assembly is counterbalanced by springs enclosed within tubes that 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 that turns about a vertical axis in a fixed bracket. Each of these arms is pivoted at its upper end to a floating bracket that is pivoted to a similar upper pair of parallel arms. An article support bracket is mounted upon the other end of the upper pair of arms and may include 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 arm of each pair of arms to exert a counterbalancing effect upon its pair of arms. A nylon shoe is connected to at least one end of each spring and is slidable within the tube.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: July 10, 1979
    Assignee: Jac. Jacobsen A/S
    Inventor: Jens C. Krogsrud
  • Patent number: D295287
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: April 19, 1988
    Assignee: Luxo Lamp Corporation
    Inventors: Jens C. Krogsrud, Douglas M. Spranger