Tensioning device for a flexible drive element

Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements

Patent

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Details

F16H 712, F16H 710

Patent

active

039317455

ABSTRACT:
A drive chain trained about a drive and driven sprockets of different diameters is kept in proper tension by a tensioning device comprising a tensioning member located between the sprockets and extending transversely to the line of centers passing through the axes of rotation of the sprockets. The tensioning member is in the form of a rectangular block defining an opening through which the drive chain passes, opposite sides of the opening being bounded by inwardly facing abutment surfaces respectively engaging the opposite runs of the chain. The tensioning member is biased towards the larger of the sprockets and against the chain through means of a coil compression spring mounted on a guide rod which passes through an opening in the tensioning member and is pivotally mounted on and for swinging movement to the opposite sides of the line of centers of the sprockets at a location between the tensioning member and the smaller of the sprockets.

REFERENCES:
patent: 3673884 (1972-07-01), Southiere
patent: 3811332 (1974-05-01), Brown et al.
patent: 3834477 (1974-09-01), Sandow

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