Chain hoist

US6286816A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Karl Liebig · Wetter, DE
• Oliver Moll · Solingen, DE
• Michael Schubert · Clayton, US

Key dates

• Filing date: Oct 21, 1999
• Grant date: Sep 11, 2001
• Expiry date: Oct 21, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66D3/26
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A chain hoist, includes a chain which is trained over first and second sprockets defining a movement path for the chain, with the first sprocket being connected to a load-bearing member, and with the second sprocket being part of a drive unit for operating the chain. In order to effectively prevent chain vibrations caused by the so-called polygon effect, the chain hoist includes a damping unit which is positioned in the movement path of the chain for damping vibration.