Patents by Inventor Matti Numminen

Matti Numminen 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: 4537527
    Abstract: Apparatus for providing a vertical drain in the soil, comprising a push tube to be pushed into the soil and which carries within it a prefabricated drain, provided with an anchor on the lower end, said prefabricated drain remaining in its place with the aid of an anchor while the push tube is being pulled back upwards. The push tube carries within itself a cut-off device at its lower end for the prefabricated drain, cutting it at desired height. Thereafter, the push tube is, if needed, lifted up for another anchor to be affixed to the lower end of the prefabricated drain. The object of the invention is to achieve that the prefabricated drain that has been cut off inside the push tube is pushed out from the lower end of the push tube.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: August 27, 1985
    Assignee: Pohjavahvistus Oy
    Inventors: Mauno O. Juhola, Matti Numminen