Patent · US Active

Hydraulic aggregate for hydraulic power wrenches

US8347980B2 · kind B2 · utility

0Cited by

7References

5Claims

0Family size

Assignee

WAGNER VERMÖGENSVERWALTUNGS-GMBH & CO. KG · DE

Inventors

Paul Wagner · Mülheim an der Ruhr, DE
Bernd Thelen · Much, DE
Ulf Sittig · Bad Wurzach, DE
Günter Andres · Much, DE

Key dates

Filing date	Jan 25, 2008
Grant date	Jan 8, 2013
Priority date	—
Expiry date	May 28, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B9/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A hydraulic aggregate comprises a container, a reservoir for hydraulic oil, and a pump driven by a motor arranged in the reservoir. The motor is a pneumatic motor. An electric control unit for controlling a main valve is mounted on the container. The main valve causes a reversal of the stroke direction of the hydraulic connections. The division into pneumatics and low power electronics leads to an explosion-proof embodiment of low weight and little technical complexity.

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