Abstract: An extraction device (10) for facilitating removal of a sheared fastening element (13) in threaded engagement with a member (17). The extraction device (10) comprises of a hollow body (30) defining a cavity (33) for receiving an exposed portion of the sheared fastening element (13). The body (30) has a first face (31) onto which the cavity (33) opens to define an opening (35) through which the exposed portion (29) of the sheared fastening element (13) can be received, The cavity (33) has a boundary wall (35) with an inwardly stepped configuration (45) in the direction towards the opening (35). The stepped configuration (45) presents at least one edge (49) which facilitates welding of the body (30) to the exposed portion (29) of the sheared fastening element (13) received within the cavity.

Abstract: A radiator tube (111) having a portion at each end which is adapted to be received in a header tank of a radiator and an intermediate portion between the ends, said intermediate portion having a cross section defined by a pair of side walls (121) and a pair of end walls (123), the side walls are generally parallel and have a spacing between them which is less than the spacing between the end walls, the side walls supporting a set of generally parallel fins (113), each fin extending laterally from the tube, each fin having an inner side edge thermally communicating with the respective side wall of the tube and an outer side edge (119) in a substantially spaced parallel relationship with the inner side edge, a forward edge (115) and a rear edge (117), said forward edge having an arcuate configuration taking the form of a continuous curve extending from the forward most edge of the fin to the outer side edge.

Abstract: An amusement ride (10) involving riders (17) being conveyed through the air. The amusement ride (10) comprises a tower (11) having a column (23), typically of a height of at least 30 metres. A hub structure (33) is supported on the column (23) for rotation with respect thereto and for displacement therealong. A first drive means (51) is provided for rotating the hub structure (33) with respect to the column (23). A second drive means (61) is provided for displacing the hub structure (33) along the column (23). Rider carriers (81) are suspended from the hub structure (33) to undergo motion in response to movement of the hub structure (33) with respect to the column (23), involving the riders (17) being conveyed along a path around the column (23), with the elevation of the riders changing during the ride through displacement of the hub structure (33) along the column (23). The amusement ride (10) is of a design which is conducive to construction on a large scale.