Automatic belt tensioning mechanism

Details Automatic belt tensioning mechanism Automatic belt tensioning mechanism

1979-10-29

1981-02-10

Staab, Lawrence J.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Tension adjuster or shifter driven by electrical or fluid motor

7424215R, F16H 710, F16H 712

Patent

active

042494257

ABSTRACT:
An automatic belt tensioner has a vacuum motor which is stroked by a variable vacuum source such as a gasoline engine intake to drive a one-way device which is operatively connected to rotate a nut in one direction. A nut is threadably engaged with a nonrotatable screw member and is connected to a pivotal support member. When the nut is rotated in one direction by the vacuum motor and the one-way device, the screw member is moved longitudinally to pivot the pulley support in a direction to increase belt tension. The reaction force between the nut and screw member which is proportional to belt tension is applied to a vacuum cut-off mechanism which disconnects the vacuum source from the vacuum motor so that a predetermined belt tension is maintained.

REFERENCES:
patent: 3142193 (1964-07-01), Polko et al.
patent: 3442147 (1969-05-01), Downey
patent: 3785220 (1974-01-01), Jacobs
patent: 3888217 (1975-06-01), Hisserich

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