Patents by Inventor Dietmar Leeb

Dietmar Leeb 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: 5176026
    Abstract: An apparatus for measuring the surface hardness of building materials, having a housing comprising a test hammer, a driving spring and an impact pin, said test hammer being moveable by means of said driving spring along a path in said housing to be brought to impact against said impact pin, which for measurement is placed on the surface to be measured, and further having measuring device for measuring a rebound height of said test hammer wherein said test hammer is provided with an optical pattern extending over at least part of its length and wherein said measuring device comprises an optical detection unit arranged adjacently to said path of the test hammer and provided for detecting said optical pattern of the test hammer, and wherein said measuring device further comprises an evaluation circuit connected to said optical detection unit to determine the maximum height of the rebounding hammer at the upper end of its path after impact.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: January 5, 1993
    Assignee: Proceq S.A.
    Inventors: Dietmar Leeb, Ueli Brunner
  • Patent number: 4064319
    Abstract: An upset head and a method of producing the same at a high-strength tension wire, wherein there is formed a supporting seating surface at the transition between the head and the wire. The maximum head diameter is located in the third of the height of the head situated closest to the seating surface. The head diameter at the free head end is equal to or smaller than the wire diameter and the head possesses the shape of a truncated cone at its end section.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: December 20, 1977
    Assignee: Bureau BBR Ltd.
    Inventors: Hans Rudolf Siegwart, Dietmar Leeb
  • Patent number: 4034603
    Abstract: A method of, and apparatus for, testing the hardness of a material by means of an impact device wherein an impact body having a test tip or point which is either integrated, e.g., connected with, or separate from, the impact body is brought to impact against the material to be tested. There is determined the velocity of the impact body and/or the test tip both directly before and after impact, and there is then formed a characteristic value from both velocities which is utilized as criterion for the hardness of the material.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: July 12, 1977
    Assignee: Proceq SA
    Inventors: Dietmar Leeb, Marco Brandestini