Patents by Inventor Leif Jelberyd

Leif Jelberyd 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: 4466354
    Abstract: An apparatus for the charging of rising drillholes (10), preferably large holes of diameter approximately 100 mm or more, with pipecharges (22). The aim is to make it possible to feed charges into the hole in such a way as to fill the hole effectively while making it easy to apply the necessary firing gear (primer and detonator). The charging apparatus comprises a stand (14) capable of being aligned with the mouth (28) of a drillhole by pivoting on a fixed surface (26). The stand includes a lifting means (18) which is provided with a rest (20) capable of travelling towards and away from the drillhole, to carry pipecharges. That part of the stand which is aligned with the drillhole consists of a guide unit (16) which is arranged to guide the pipecharges into the drillhole as the rest travels towards the said drillhole. The pipecharges are retained in place after the lift by retaining means (30).
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: August 21, 1984
    Assignee: Nitro Nobel AB
    Inventors: Leif Jelberyd, Gunnar Egerstrom