Rack and pinion jack

US5170994A · kind A · utility

Assignee

• Haacon Hebetechnik GmbH · DE

Inventors

• Reinhold Riedl · Miltenberg, DE
• Paul Beck · Freudenberg, DE

Key dates

• Filing date: Oct 31, 1991
• Grant date: Dec 15, 1992
• Expiry date: Oct 31, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D90/143
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In order to be able to handle containers of a height greater than the structural height of a rack and pinion jack in its retracted state, the top crosspiece of the rack and pinion jack is provided to be bent and provided with a double-acting engagement part. Thus, the top crosspiece can be brought into its top position with its engagement part engaging with the top corner metal fittings of a container of which the height exceeds that of the rack and pinion jack in a retracted state. By a simple 180.degree. rotation of the top crosspiece, its engagement part can be brought into engagement with the top corner metal fittings of another container, having a different structural height. In this manner, the rack and pinion jacks can be adapted to any height setting of the top crosspiece by 180.degree. rotation of the same to any two containers of different structural height. Thus the rack and pinion jacks are suitable even for containers of which the height lies below the level of the top articulation point of the bottom crosspiece of the rack and pinion jack.