Patent ID: 7757820

Claim:
A rotor brake comprising: a front tube having a top; a tube opening axially defined in the top of the front tube; and a maintenance hole radially defined in the front tube and communicating with the tube opening; a plug mounted securely in the maintenance hole; an upper bearing assembly mounted securely on the top of the front tube; a braking device mounted in the tube opening and having a sliding bracket slidably and rotatably mounted in the tube opening and having an outer surface; and an upper rotator rotatably mounted around the sliding bracket; and a C-shaped self-lubricant bushing mounted around the outer surface of the sliding bracket between the upper rotator and the sliding bracket; at least one upper brake cable mounted through the upper bearing assembly and embedded in the upper rotator; and at least one spring corresponding to the at least one upper brake cable, mounted in the tube opening, mounted compressibly around the at least one upper brake cable and abutting the upper bearing assembly and the upper rotator.