Tensioning and safety apparatus for conveyor chain of row-crop harvester

US4199924A · kind A · utility

Assignee

• Veb Kombinat Fortschritt Landmaschinen Neustadt in Sachsen · DE

Inventors

• Theodor Eistert · Neustadt, DE
• Christian Noack · Lensahn, DE
• Bernd Zumpe · Bad Schandau, DE
• Konrad Bergmann
• Gerhard Schmidt · Wilthen, DE
• Manfred Teichmann · Bischofswerda, DE
• Hans P. Spaida · Neustadt, DE
• Gerrit Unger · Bad Schandau, DE
• Arthur Hauschild · Neustadt in Sachsen, DE

Key dates

• Filing date: Jun 6, 1978
• Grant date: Apr 29, 1980
• Expiry date: Jun 6, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S56/15
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A row-crop harvester has a frame displaceable along the ground and formed with a plurality of forwardly opening throats at each of which is provided an endless conveyor chain spanned over a drive sprocket and an idler sprocket. A fluid cylinder mounted on the frame is provided for each of the idler sprockets so that when this cylinder is pressurized it can urge the respective idler sprocket away from the respective drive sprocket and tension the respective conveyor chain. A pressure-responsive switch is connected to each of the fluid cylinders and to a magnetic clutch between the drive for the chopper and drive sprockets for the harvester. When the pressure drops suddenly in any of the cylinders, as happens when a chain breaks, his pressure-responsive switch will respond and open the clutch to shut down the harvester.