Abstract: A horizontal centrifugal scroll screen apparatus including: a housing; a frusto-conical screen assembly mounted within the housing and having an outer inlet end and an inner discharge end, the screen assembly being mounted for driven rotation via a base-of-spoke piece disposed across the inner discharge end thereof; and a frusto-conical scroll assembly coaxially mounted for differential driven rotation within the screen assembly and including an outer closed end in the proximity of the outer inlet end of the screen assembly and being adapted to direct material to be screened from a material supply conduit to the outer inlet end of the screen assembly for screening and conveyance to an outlet provided in the base-of-spoke piece.

Abstract: A watercraft suitable for operation in rough water conditions is disclosed. The watercraft comprises a central platform (13) and two pairs of hull units (60), a forward pair and an aft pair. The hull units are located on opposite sides of tie platform and extend below the platform, with each hull unit comprising a mount (54) attached to the platform and a trailing hull connected to the mount via a movable hull support. The components of the hull units are connected by joints (58,62) arranged to constrain lateral and axial movement of: the hull relative to the platform (12) but to permit pivoting thereof about the mount (54). Each hull unit has a suspension assembly arranged to support the respective hull units, and comprises a suspension member (66) extending from the platform (12) to a mounting point (20) on the hull aft of the respective mount, and being arranged to accommodate movement of the hull relative t) the platform and to apply damping to movement of the hull.

Abstract: A horizontal centrifugal scroll screen apparatus including: a housing; a frusto-conical screen assembly mounted within the housing and having an outer inlet end and an inner discharge end, the screen assembly being mounted for driven rotation via a base-of-spoke piece disposed across the inner discharge end thereof; and a frusto-conical scroll assembly coaxially mounted for differential driven rotation within the screen assembly and including an outer closed end in the proximity of the outer inlet end of the screen assembly and being adapted to direct material to be screened from a material supply conduit to the outer inlet end of the screen assembly for screening and conveyance to an outlet provided in the base-of-spoke piece.

Abstract: A watercraft suitable for operation in rough water conditions is disclosed. The watercraft comprises a central platform (13) and two pairs of hull units (60), a forward pair and an aft pair. The hull units are located on opposite sides of tie platform and extend below the platform, with each hull unit comprising a mount (54) attached to the platform and a trailing hull connected to the mount via a movable hull support. The components of the hull units are connected by joints (58,62) arranged to constrain lateral and axial movement of: the hull relative to the platform (12) but to permit pivoting thereof about the mount (54). Each hull unit has a suspension assembly arranged to support the respective hull units, and comprises a suspension member (66) extending from the platform (12) to a mounting point (20) on the hull aft of the respective mount, and being arranged to accommodate movement of the hull relative t) the platform and to apply damping to movement of the hull.

Abstract: The present invention provides a baseball practice machine for propelling balls onto a practice field thereby providing simulated hits for use in fielding practice for ball players. The practice machine includes a ball hopper, a propulsion unit for propelling a ball toward a practice field, a movable barrel through which a ball is propelled. A barrel positioner is coupled to the propulsion unit and the movable barrel for adjusting the position of the barrel thereby controlling the trajectory of a propelled ball. A programmable control system controls the operation of the practice machine. Trajectory parameters for the propelled balls are selected from predetermined parameters defining the path of the ball to a location of a practice field where the ball is intended to land. Information defining the dimensions of a practice field are stored in a memory of the control system and used in determining the trajectory parameters.

Abstract: The present invention provides a baseball practice machine for propelling balls onto a practice field thereby providing simulated hits for use in fielding practice for ball players. The practice machine includes a ball hopper, a propulsion unit for propelling a ball toward a practice field, a movable barrel through which a ball is propelled. A barrel positioner is coupled to the propulsion unit and the movable barrel for adjusting the position of the barrel thereby controlling the trajectory of a propelled ball. A programmable control system controls the operation of the practice machine. Trajectory parameters for the propelled balls are selected from predetermined parameters defining the path of the ball to a location of a practice field where the ball is intended to land. Information defining the dimensions of a practice field are stored in a memory of the control system and used in determining the trajectory parameters.