BigPatents India

A semi automatic coke drum deheader device (22) for use on a coke drum wherein the coke drum includes an upper opening (7), a flange (6) surrounding the upper opening (7) and a first vessel cover (2) releasably attached to the flange (6). The deheader device (22) comprises a frame (34a) attached to the coke drum, a bridge (1) for supporting the first vessel cover (2) and a second vessel cover (4), a central shaft (13) having a distal end (13a). A lift assembly is attached to the frame (34a) for engaging the thrust collar (37) to selectively raise and lower the bridge (1) relative to the flange (6), and a rotational assembly is operatively connected to the central shaft (13) for rotating the bridge (1) to selectively align the first vessel cover (2) or the second vessel cover (4) above the flange (6) during the delayed coking process (FIG. - 1)