Attachment for preventing reverse rotation of a shaft

Details Attachment for preventing reverse rotation of a shaft Attachment for preventing reverse rotation of a shaft

F - Mech Eng,Light,Heat,Weapons

16

D

F16D 59/00 (2006.01) F16D 65/04 (2006.01)

Patent

CA 2471445

A fan rotor is mounted on a shaft carried on bearings attached to a base plate and there is provided an assembly for preventing reverse rotation of the fan which could damage the motor. A stop plate is mounted on the base adjacent the shaft with an edge adjacent the shaft, A pair of wing members are carried on the shaft on two collar pieces so that each wing member is pivotal between ends of the collar pieces about an axis parallel to the tangent to the shaft at the wing member. The wing members are V-shaped and pivot so that one leg moves under gravity either in the vertical or horizontal orientations of the shaft from a retracted position, in which it is free from the stop plate to an extended position in which it engages the abutment surface of the stop member to prevent reverse rotation. The wing members are shaped and weighted such that rotation of the shaft beyond a predetermined angular velocity causes centrifugal force to move the wing members to the retracted position.

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