Drive mechanism for a vertically rotating member

Details Drive mechanism for a vertically rotating member Drive mechanism for a vertically rotating member

E - Fixed Constructions

01

F

E01F 13/00 (2006.01) E01F 13/06 (2006.01)

Patent

CA 2092554

2092554 9205314 PCTABS00011 A drive mechanism for a pivoted member (1) such as a beam of a traffic barrier comprises a rotary element (6) coupled to the pivoted member (1). A friction roller (7) for driving the rotary element (6) is supported on a mounting (8) that is pivoted on an axis (9) and biased about the axis (9) to hold the friction roller (7) in pressure contact with the rotary element (6). When the friction roller (7) is driven to rotate the element (6) to raise the pivoted member (1) the frictional force between the roller (7) and the driven element (6) is increased, whereas the frictional driving force is reduced when the roller (7) is rotated in the reverse direction.

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