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US 6,234,913 B1Granted
Method of manufacturing of fastening elements
AssigneeHilti Akteingesellschaft
InventorChristian Bömcke
Life of this patent
Estimating the term…
Abstract
A method for manufacturing of fastening elements (5, 6) and including producing a blank (1) having a length exceeding a combined length of two fastening elements, upsetting a head (2, 3) at each of opposite ends of the blank (1), heating a section of the blank (1) located between the opposite heads (2, 3) formed at the opposite ends of the blank, and, thereafter, pulling apart the heated section (4) until the heated section (4) is separated.
Claims7
A method of manufacturing of fastening elements (5, 6), comprising the steps of producing a blank (1) having a length exceeding a combined length of two fastening elements;
- upsetting a head (2, 3) at each of opposite ends of the blank (1);
- heating as section of the blank (1) located between the opposite heads (2, 3) formed at the opposite ends of the blank;
- and, thereafter, pulling apart the heated section (4) until the heated section (4) is separated,
- Wherein the heating step comprises heating the section (4) between the opposite heads (2, 3) of the blank (1) which has a length that exceeds a thickness of the blank, measured in a direction transverse to a longitudinal extent of the blank, from 2 to 8 times.
1 more element
Dependencies are inferred from the claim text.