Patent · US Expired

Hydraulic tensioning device for threaded bolt

US5803436A · kind A · utility

10Cited by

5References

20Claims

0Family size

Inventors

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

Key dates

Filing date	Aug 2, 1996
Grant date	Sep 8, 1998
Priority date	—
Expiry date	Aug 2, 2016

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25B29/02
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hydraulic tensioning device for a threaded bolt has a cylinder resting on a machine part to be clamped with a threaded bolt and a nut. It further has a threaded bushing threaded onto a free end of the threaded bolt. A piston is guided sealingly in the cylinder and rests on the threaded bushing. A safety catch is connected to the cylinder or the piston and engages either the nut or the threaded bushing.

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