Patent · US Active

Method for tensioning screw bolts, as well as screw bolt and screw bolt tensioning device for carrying out the method

US8616094B2 · kind B2 · utility

5Cited by

7References

15Claims

0Family size

Inventors

Frank Hohmann · Warstein, DE
Jörg Hohmann · Meschede, DE

Key dates

Filing date	Jan 25, 2011
Grant date	Dec 31, 2013
Priority date	—
Expiry date	Jan 20, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49963
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

This invention relates to a method for hydraulically tensioning screw bolts as well as to screw bolts and screw bolt tensioning devices for carrying out the method. It is proposed to apply the total pretensioning force for one part via an external thread and for the remaining part via an internal thread of the bolt end.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.