Patent ID: 7469793

Claim:
A rack apparatus comprising: a rack body having at least one shelf and a plurality of stings at corners of the shelf; said plurality of stings each having a plughole at an end thereof; a plurality of inverted U-shaped slide rests having a standing column at each end thereof, said standing column fitting into said plughole; a plurality of rollers rotatably mounted to the slide rests, each of said plurality of rollers having a left roller and a right roller, said left roller and said right roller having a compartmental rut therebetween, said left roller and said right roller each having a bottom edge extending outwardly of a bottom of the slide rests; a pair of parallel sliding tracks each formed of a plurality of separate sliding rails being connected together and fixed by bolts to an underlying surface, said pair of parallel sliding tracks respectively bearing the slide rests thereon, the rails being connected together by a flange and concave rim connector, the rail having a convex shape with a convex edge in a center thereof, said convex edge being received in said compartmental rut; a blocking means affixed at an end of the rail for stopping the slide rest so as to keep said rack body on the rails; and a braking module affixed to the slide rest, said braking module comprising: a braking device affixed on a top surface of the side rest, said braking device having a control end and a braking end, said braking end being pivotally positioned, said braking end being a spinning point for said control end so as to allow said control end to oscillate upwardly and downwardly, said braking end defining a curved section, said control end extending toward one side of the slide rest; a braking block affixed at a bottom of the slide rest such that a bottom of said braking block can touch the rail; a transmission shaft positioned inside the slide rest, said transmission shaft being slidable upwardly and downwardly, said transmission shaft having a bottom connected to said braking block, said transmission shaft having a top extending to said top surface of said slide rest so as to correspond to said curved section of said braking device; and an elastic device cooperative with said transmission shaft so as to be urged upwardly by said transmission shaft.