Patents by Inventor Horst Muhlberger

Horst Muhlberger 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).

  • Cast iron with spheroidal graphite and austenitic-bainitic mixed structure
    Patent number: 4541878
    Abstract: A high ductility machinable cast iron with mixed austenitic-bainitic structure is made by a method which involves limiting the manganese content to less than 0.3% by weight and utilizing a substantially lower temperature austenitizing heat treatment (820.degree. to 830.degree. C.) for a shorter period (10 to 25 minutes) than has hitherto been considered to be necessary to achieve such structures. The low alloy cast iron can therefore be made from available scrap with low manganese content and at low cost.
    Type: Grant
    Filed: December 16, 1983
    Date of Patent: September 17, 1985
    Assignee: Horst Muhlberger
    Inventors: Horst Muhlberger, Bruno Prinz, Wolf Wunder, Ulrich Schafer, Josef Bognar
  • Welding alloy and method
    Patent number: 4426426
    Abstract: Spheroidal graphite cast iron body can be welded using a welding alloy whose carbon diffusion rate is sufficiently high that cementite formation is prevented. The alloy has essentially the following composition:less than 0.2% manganese,less than 2.0% carbon,2.5 to 3.2% silicon,up to 1.0% copper,up to 0.5% molybdenum,up to 2% aluminum,up to 30% nickel,up to 0.1% tungsten,up to 0.1% chromium,up to 0.1% vanadium, magnesium and/or rare earth elements in an amount up to and sufficient to promote the formation of graphite spherolites upon cooling, andbalance substantially iron.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: January 17, 1984
    Inventor: Horst Muhlberger
  • Thermometric bimetallic structure of high strength at high temperature
    Patent number: 4013425
    Abstract: A thermometric bimetallic structure of high strength at elevated temperatures of, say, 500.degree. C to 700.degree. C, comprises an active component and a passive component secured together, the active component having a coefficient of thermal expansion of about 19 .times. 10.sup.-.sup.6 .degree.C.sup.-.sup.1 to 22 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1 while the passive component has a coefficient of expansion of 3 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1 to 12 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1. The active component, which expands to a substantially greater extent than the passive component upon heating, consists of 0.4 to 0.9% by weight carbon, 0.03 to 0.1% by weight nitrogen, 10 to 14% by weight nickel, 3 to 7% by weight manganese, 0.2 to 1% by weight niobium and/or tantalum, 0.5 to 1.5% by weight vanadium, up to 1.5% by weight molybdenum, up to 1.5% by weight tungsten, up to 3.5% by weight chromium, up to 0.
    Type: Grant
    Filed: June 22, 1976
    Date of Patent: March 22, 1977
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Horst Muhlberger, Manfred Ruhle