Patent ID: 6050277
Filing Date: 2000-04-18
Classification: B08B,B66F,C10B

Abstract:
An apparatus for a decoking system for raising and lowering a cutting tool into a coking drum, comprising:a rigid vertical member extending above said coking drum and having a toothed rack extending substantially the full height of said member;a rigid frame movably mounted to said rigid vertical member, said rigid frame having means for mounting a cutting tool;a motor mounted to said rigid frame and having means for driving at least one pinion gear, said at least one pinion gear being drivably engaged on said toothed rack such that rotation of said pinion raises or lowers said rigid frame on said rigid vertical member;a pulley mounted near the top of said rigid vertical member; anda flexible cable fixed to a top surface of said rigid frame and extending over said pulley to a counterweight, said counterweight substantially balancing the weight of the movable rigid frame and all components carried thereon.