Screw conveyor made of alloyed steel and tempered by electromagnetic induction or exposure to a flame

{
  "publication_number": "US9790568B2",
  "country": "US",
  "kind": "B2",
  "title": "Screw conveyor made of alloyed steel and tempered by electromagnetic induction or exposure to a flame",
  "abstract": "A helicoid conveyor screw manufactured from alloy steel and tempered by electromagnetic induction or flame used to convey abrasive granular products in the process of screw rotation under high friction and wear. Its inventive principle is related to the method for obtaining it by alloying steel with the chemical element Boron (B) and heat treating it, which results in greater hardness and durability of the flight.",
  "claims": [
    "1. A helicoid conveyor screw, comprising: a mounting shaft having ends that include actuation fittings, and a tempered helix with a non-tempered inner edge that is wrapped and welded to the mouthing shaft; wherein: the helix is comprised of an alloy steel tempered by electromagnetic induction or flame.",
    "2. A helicoid conveyor screw as in claim 1, wherein: the alloy steel has a combination of Boron (B) and steel.",
    "3. A method for obtaining a helicoid conveyor screw comprising: combining alloy steel and Boron to form a Boron steel alloy, cutting the combined Boron steel alloy into long strips cold rolling the strips into a flight, tempering outer surfaces of the flight by electromagnetic induction or flame to increase hardness of flight as a result of reactive process of the Boron steel alloy combination at a high temperature wherein: an inner edge of the flight is not tempered by electromagnetic induction or flame."
  ],
  "description_excerpt": "Boron (B) is a chemical element composed of five protons and five electrons and its atomic mass is eleven amu. It is a hard metalloid in its metallic form and a conductor only at high temperatures. Furthermore, boron is an element that cannot be found in pure form but is combined with other elements as compounds, thus forming minerals. The tensile strength of this metalloid is higher than that of any other known chemical element; the mechanical resistance of the arc-melted material is between 1600 and 2400 MPa. The mechanical properties of hardened boron steel make it extremely resistant to abrasive wear and particularly useful in high-resistance structural applications, prolonging the durability of structures and saving abrasion and environment-related costs. As for the manufacturing of metallic materials, the Boron-based heat treatment when combining an alloy at a high temperature can provide the material with greater resistance to any abrasive action, thus increasing its useful life. As for the manufacturing of helicoid conveyor screws, also known as endless helicoid screws, the common process consists of obtaining an endless cold-rolled screw as a result of squashing a carbon steel plate without alloying elements, cutting it into strips, and winding it on spools. In this process, the steel does not allow tempering without the addition of carbon. After the helicoid conveyor screw is cold rolled, it is welded onto the shaft and straightened, and then it can be mounted on a machine where it will be used.",
  "cpc": [
    "C21D 9/0068",
    "B23K 9/00",
    "B23K 9/0325",
    "B65G 2207/48",
    "B65G 33/06",
    "B65G 33/26",
    "B65G 33/265",
    "C21D 1/42",
    "C21D 1/52",
    "C21D 9/22",
    "C21D 9/52",
    "C22C 38/00",
    "C22C 38/002",
    "Y02P 10/25",
    "Y02P 10/253"
  ],
  "ipc": [
    "B23K 9/00",
    "B65G 33/26",
    "C21D 1/42",
    "C21D 1/52",
    "C21D 9/00",
    "C21D 9/22",
    "C21D 9/52",
    "C22C 38/00"
  ],
  "assignees": [
    "STREIT JOAO AUGUSTO"
  ],
  "inventors": [
    "STREIT JOAO AUGUSTO"
  ],
  "filing_date": "2016-05-19",
  "publication_date": "2017-10-17",
  "grant_date": "2017-10-17",
  "priority_date": "2014-01-24",
  "application_number": "US-201615159770-A",
  "family_id": "53680521",
  "citations": [
    "BRPI0702665A2",
    "US2011317510A1",
    "US2013269301A1",
    "US3015258A",
    "US5678440A",
    "US5863197A",
    "US5899052A",
    "US6155705A",
    "US7655181B2",
    "US7905968B2",
    "US8069973B2",
    "US8763786B2",
    "US9061345B2"
  ]
}