Patents by Inventor Signar Lundmark

Signar Lundmark 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).

  • Ground stabilization equipment
    Patent number: 4316679
    Abstract: In apparatus for injecting and mixing a ground stabilization agent into the material of the earth during the operation of an earth drill, a device is provided for generating signals indicative of the upward movement of the earth drill as the drill is withdrawn and while the stabilization agent is being introduced, and a weighing device is provided for constantly weighing the remaining supply of ground stabilization agent and for thereby measuring the weight of stabilization agent delivered to the ground, and a recorder is connected to receive signals from both of the devices for providing a graphic record of the stabilization agent delivered versus the upward travel of the earth drill.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: February 23, 1982
    Assignee: Linden-Alimak AB
    Inventors: Signar Lundmark, Leif Hallgren
  • Pipe for sticking down drains into the ground
    Patent number: 3961486
    Abstract: A tube for sticking stripformed drains into the ground has a predetermined fixed profile of rhombic cross section made by pressing two opposite corners of a square tube towards each other.
    Type: Grant
    Filed: October 22, 1974
    Date of Patent: June 8, 1976
    Assignee: Linden-Alimak AB
    Inventors: Sven Granholm, Signar Lundmark