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US 4,216,848 AGranted
Centrifugal braking device
AssigneeHitachi, Ltd.
InventorToyohisa Shimodaira
Life of this patent
Estimating the term…
Abstract
Centrifugally activated members adapted to project outwardly by centrifugal forces when the rotational speed of a shaft to be braked reaches a predetermined level are brought into contact with a brake shoe to impart a rotational force thereto. When rotated, the brake shoe moves axially of the shaft to be braked so as to force a brake wheel, mounted on the shaft to be braked, against a brake disk, thereby applying the brake to the shaft to be braked.
Claims10
A centrifugal braking device comprising:
- a shaft to be braked;
- centrifugally activated members mounted on said shaft for rotation and adapted to project outwardly when the rotational speed of said shaft reaches a predetermined level;
- and
- a brake shoe means with which the centrifugally activated members are brought into contact when the latter project outwardly;
- wherein the improvement comprises:
- fixedly stationary supporting means for supporting said brake shoe means in a stationary condition in such a manner that said supporting means allows said brake shoe means to be rotated by the force of friction produced by contact with said centrifugally activated members and rotation of said brake shoe means in the same direction as said shaft to be braked causes axial movement of said brake shoe means;
- and
- a braking surface means with which the brake shoe means comes into contact as the latter moves axially so as to apply the brake to said shaft.
5 more elements
A centrifugal braking device comprising:
- a shaft to be braked;
- centrifugally activated members mounted on said shaft for rotation and adapted to project outwardly when the rotational speed of said shaft reaches a predetermined level;
- and
- a brake shoe means with which the centrifugally activated members are brought into contact when the latter project outwardly;
- wherein the improvement comprises:
- fixedly stationary supporting means for supporting said brake shoe means in a stationary condition in such a manner that said supporting means allows said brake shoe means to be rotated by the force of friction produced by contact with said centrifugally activated members and rotation of said brake shoe means in the same direction as said shaft to be braked causes axial movement of said brake shoe means;
- a braking surface means mounted in predetermined space relation in the direction of movement of said brake shoe means;
- and
- a brake wheel means mounted on said shaft and interposed between said brake shoe means and said braking surface means, said brake wheel means being mounted on said shaft against rotation relative to said shaft and for movement axially thereof;
- said brake wheel means being held between said brake shoe means and said braking surface means when said brake shoe means moves axially, whereby the brake can be applied to said shaft to be braked.
7 more elements
A centrifugal braking device comprising:
- a shaft to be braked;
- centrifugally activated members mounted on said shaft for rotation and adapted to project outwardly when the rotational speed of said shaft reaches a predetermined level;
- and
- a brake shoe means with which the centrifugally activated members are brought into contact when the latter project outwardly;
- wherein the improvement comprises:
- fixedly stationary supporting means for supporting said brake shoe means in a stationary condition in such a manner that said supporting means allows said brake shoe means to be rotated by the force of friction produced by contact with said centrifugally activated members and rotation of said brake shoe means in the same direction as said shaft to be braked causes axial movement of said brake shoe means;
- a brake disk means mounted in predetermined spaced relation in the direction of movement of said brake shoe means;
- and
- a brake wheel means mounted on said shaft and interposed between said brake shoe means and said braking surface means, said brake wheel means being mounted on said shaft against rotation relative to said shaft and for axial movement;
- said brake wheel means being held between said brake shoe means and said brake disk means to apply the brake to said shaft.
7 more elements
Dependencies are inferred from the claim text.