Patent · US Active

Power wrench

US8024996B2 · kind B2 · utility

0Cited by

1References

8Claims

0Family size

Assignee

Wanger Vermögensverwaltungs-GmbH & Co. KG · DE

Inventors

Paul Wagner · Mülheim an der Ruhr, DE
Bernd Thelen · Much, DE
Andreas Niemietz · Much, DE
Klaus Russmann · Schwarzenbek, DE

Key dates

Filing date	Mar 20, 2007
Grant date	Sep 27, 2011
Priority date	—
Expiry date	Sep 20, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25B21/005
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a hydraulic power wrench comprising a ratchet lever (16) driven by a hydraulic cylinder. According to the invention, said power wrench is provided with a friction brake (20) which operates continuously between the housing (10) and the output shaft (14). In this way, reversed rotations of the output shaft following the individual working strokes are avoided.

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