Method of, and a device for, controlling the rotation of an elem

Details Method of, and a device for, controlling the rotation of an elem Method of, and a device for, controlling the rotation of an elem

1991-02-28

1993-02-16

Oberleitner, Robert J.

Brakes

Wheel

Transversely movable

188 826, F16D 5100

Patent

active

051862859

ABSTRACT:
A device for controlling the rotation of an element about an axis includes an arrangement for selectively precluding downward rotation of the elements. The arrangement includes a stationary cylindrical member, a wrap spring wrapped around the cylindrical member and a control member mounted on the element. One end of the wrap spring is anchored to the element to prevent downward rotation of the element. The control member is connected to an opposite end of the wrap spring and is movable between first and second positions such that the wrap spring is wrapped tightly about the cylindrical member to prevent downward rotation of the element whenever the control member is in the first position, and such that the wrap spring is wrapped loosely about the cylindrical member to enable rotation of the element whenever the control member is in the second position and whenever the element is rotated in an upward direction.

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