Patents by Inventor Levi J. Karifors

Levi J. Karifors 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).

  • Method for explosive breaking of hard compact material
    Patent number: 4088368
    Abstract: A hard compact material, such as rock, is broken by delivering an explosive into at least one hole which has been pre-drilled in the material to be broken and by forcing a relatively incompressible fluid, such as water, into the hole to impact the explosive to initiate same. Upon detonation of the explosive the fluid stems the hole thereby delaying leakage of blasting gases out of the hole before the material is broken. Preferably, the explosive and the fluid are launched together into the hole. In this case may the explosive and the fluid be encapsulated in a common cover.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: May 9, 1978
    Assignee: Atlas Copco Aktiebolag
    Inventors: Erik V. Lavon, Levi J. Karifors