Hydraulic lifting column

US10895273B2 · kind B2 · utility

Assignee

• HAWE Altenstadt Holding GmbH · DE

Inventors

• Martin Storz · Tuttlingen, DE
• Gerhard Rinninger · Pforzen, DE
• Erich Rankl · Bad Griesbach im Rottal, DE
• Thomas Stockmeier · Baden, CH
• Christian Hart · Nittendorf, DE
• Danny AURICH · Deggendorf, DE

Key dates

• Filing date: Oct 4, 2019
• Grant date: Jan 19, 2021
• Expiry date: Oct 4, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66F7/20
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic lifting column comprising a base structure, a head structure and a lifting structure. The lifting structure comprising a hydraulic power unit and hydraulic linear actuators extending between the base structure and the head structure, the hydraulic power unit acting on the hydraulic linear actuators. The lifting structure comprising four linear actuator units with a mutually parallel, vertically oriented working direction. Each linear actuator unit comprising a double cylinder having two-cylinder bores arranged next to one another and two piston structures with piston rods oriented parallel to one another and extendable in opposite directions from the double cylinder. The four lower piston rods are connected to the base structure at the corners of a first quadrilateral and the four upper piston rods are connected to the head structure at the corners of a second quadrilateral.