Lifting device with a higher speed in the downward movement area than in the upward movement area

US4779719A · kind A · utility

Assignee

• Maschinenfabrik Hellmut Geiger GmbH. & Co. KG · DE

Inventors

• Bertram Botsch · Karlsruhe, DE
• Werner Marzluf · Rheinstetten, DE

Key dates

• Filing date: Jun 18, 1987
• Grant date: Oct 25, 1988
• Expiry date: Jun 18, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65G23/22
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Lifting device with a higher speed in the downward movement area than in the upward movement area, equipped with a driving motor with brake, a gear and a load pick-up system, which runs on an oval or circular or loop-shaped race via a lower and an upper reversion device and which takes up the load in the lower area and delivers it in the upper area. A driving motor is used whose characteristic of torque versus rotation runs relatively flat and whose number of rotations in the downward movement area is in the ratio of at least 1.5:1 compared to the number of rotations in the upward movement area.