Patents by Inventor Leif Jerberyd

Leif Jerberyd 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).

  • Device for charging drillholes
    Patent number: 4522129
    Abstract: A two-piece, telescopic climber, which is insertable into a drillhole behind cylindrically shaped explosive charges, alternately advances one and then the other of its two telescopic pieces in the direction of the drill hole thereby to urge the charges forwardly thereof into the hole. Each piece has thereon means which expands outwardly against the wall of the drill hole to hold that piece stationary while the other piece advances. At least one of the two pieces can be removed from the drill hole to be used repeatedly.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: June 11, 1985
    Assignee: Nitro Nobel AB
    Inventor: Leif Jerberyd