Patent ID: 7441633

Claim:
An automatic brake apparatus for a walking support machine having steering handles ( 1 ), main body ( 2 ), and front and rear wheels ( 3 ) ( 4 ), said apparatus comprising: fixed disks ( 10 ) which are installed at the bottom of said main body and said rear wheels ( 4 ) to enable rotation; high speed gears ( 20 ) and low speed gears ( 30 ) which are installed in the rear wheels concentrically; brake drums ( 40 ) which are installed on the outside of the fixed disks ( 10 ); 1st gears ( 50 ) installed on a center shaft of said brake drums ( 40 ); 2nd gears ( 60 ) which are installed on one side of said brake drums ( 40 ) with unidirectional clutches (C) to prevent backward running and assembled with said 1st gear ( 50 ); rotatable adjusting knobs ( 70 ) which are installed inside of said fixed disks ( 10 ), and assembles said 1st gears ( 50 ) and said 2nd gears ( 60 ) selectively with high speed gears ( 20 ) and low speed gears ( 30 ); and two pairs of brake disks ( 80 ) installed inside said brake drums ( 40 ) to receive tension spring (S 1 ) and which rotate in connection with said 1st gears ( 50 ).