Patents by Inventor Holger E. Klingstedt

Holger E. Klingstedt 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: 4444372
    Abstract: At anchoring in concrete, plugs and/or expanders are used; which require relatively deep holes for providing the strength required. In order to reduce the necessary hole depth without deteriorating the strength, and in general to facilitate and render cheaper the anchoring in concrete and other hard material, the present tensile force absorbing anchoring comprises an anchoring member formed integral of steel wire, with an anchoring portion located in a hole in the material, which portion comprises two gripping members, each with a free end engaging with the hole wall. The members are formed integral, with each of their two shanks abutting an opposed side of the hole wall against the engaging surface of the free end of the respective gripping member and extending axially out of the hole.
    Type: Grant
    Filed: June 10, 1981
    Date of Patent: April 24, 1984
    Assignee: Miljotakmontage AB
    Inventors: Ingvar Klingstedt, Holger E. Klingstedt, Artur E. Berggren