Tensioning device for chains

US4456233A · kind A · utility

Assignee

• Eisen- und Drahtwerk Erlau AG · DE

Inventor

• Anton Muller · Wetter, DE

Key dates

• Filing date: Dec 17, 1981
• Grant date: Jun 26, 1984
• Expiry date: Dec 17, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T24/2181
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A tensioning device for chains such as tensioning chains, sling chains, tire chains and the like with a tensioning unit having at least one tensioning spindle which is connected with a tensioning nut and having at least one damping spring. The damping spring is a cup spring package and the cup spring package is installed in the tensioning unit. A multiplicity of the cup springs of the spring package can have a single layer and the remaining cup springs can have multilayer arrangement. More than half of the spring path, preferably approximately 80% of the entire spring path of the spring package is preloaded with a half force which is at least smaller by approximately one half than the preloading force of the remaining spring path. A control device has an indicator connected with a tensioning spindle and this indicator such as a bolt is movable, preferably is journalled longitudinally shiftable in a housing opening. The bolt is located approximately radially with respect to the tensioning spindle and preferably is secured to an abutment or ring at one end side thereof such as a plate and the bolt projects with another end into the housing having an opening therein.