Patent ID: 6854568

Claim:
A caster braking device comprising: a wheel having a protruding rim with an axial hole; an outer periphery of the protruding rim being formed with a plurality of teeth which are spaced with an equal space; a supporting seat having a round mask one side of which is connected to a vertical tube; an axial tube being formed in an opening of the round mask; the axial tube being engaged to the axial hole of the wheel; an upper end, of the round mask being formed with a slot; an axial rod; the axial tube of the supporting seat receiving the axial rod; the wheel being rotatable freely; a positioning rod being formed in the slot of the round mask; a pinhole being formed in the positioning rod and an upper end of the positioning rod having a recess; a lower end of the positioning rod having a buckling groove for buckling one tooth of the wheel; a sliding seat having a U shape; two guide posts being transversally formed between two legs of the sliding seat so that a guide groove being formed between the two guide posts; the two guide posts being placed in the recess of the positioning rod; a pin passes through the pinhole of the positioning rod and the guide groove of the sliding seat so as to combine the positioning rod and the sliding seat; the pin being movable in the guide groove so that as the sliding seat is pushed, the positioning rod is movable up and down; so that the buckling groove is buckled with the tooth of the wheel to brake the wheel or the buckling groove retracts from the teeth of the wheel so that the wheel is slidable.