Centrifugal braking device

Claim 2

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.

Claim 3

A centrifugal braking device as claimed in claim 1, wherein the improvement further comprises rotation stopping means which restricts the angle of rotation of said brake shoe means.

Claim 4

A centrifugal braking devices as claimed in claim 1, wherein the improvement further comprises a tool engaging projection formed on said brake shoe means for turning the brake shoe means in the reverse direction.

Claim 5

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.

Claim 6

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.

Claim 7

A centrifugal braking device as claimed in claim 4, wherein said brake shoe means includes a cylindrical portion and a flange, said brake shoe means being rotatably supported at the outer periphery of said cylindrical portion, said cylindrical portion having an inner surface being located in spaced juxtaposed relation to said centrifugally activated members, and said flange being located in spaced juxtaposed relation to said brake wheel means.

Claim 8

A centrifugal braking device as claimed in claim 5, wherein said brake shoe means further includes a bottom formed thereon with a tool engaging projection.

Claim 9

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.

Claim 10

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.

Claim 11

A centrifugal braking device as claimed in claim 7, wherein the improvement further comprises means for resiliently yieldably supporting said brake disk means.

Claim 12

A centrifugal braking device as claimed in claim 7, wherein said brake shoe means includes a cylindrical portion and a flange, said brake shoe means being rotatably supported at the outer periphery of said cylindrical portion, said cylindrical portion having an inner surface being located in spaced juxtaposed relation to said centrifugally activated members, and said flange being located in spaced juxtaposed relation to said brake wheel means.

Claim 13

A centrifugal braking device as claimed in claim 9, wherein said brake shoe means is formed at the outer periphery of its flange with projections for restricting the angle of rotation.