Abstract: A liquid sealing actuator system enables use in a non-contact or low-friction manner.

Abstract: A wave generating apparatus (100) for generating at least one wave in a surface of a body of water (102) has at least one wave generating object (12, 150) with at least one wave generating surface (13, 152), drive means (108, 110) for causing the wave generating object to oscillate along a path (106), with the wave generating object in contact with the body of water for at least some of the time. When there is a single wave generating object (12, 150), the wave extends away from the wave generating object and when there are multiple wave generating objects (12, 150), the wave generating objects (12, 150) and wave generating surfaces (13, 152) are configured such that substantially all of any waves generated extend away from the wave generating objects.

Abstract: A liquid sealing actuator system enables use in anon-contact or low-friction manner.

Abstract: A wave generating apparatus (100) for generating at least one wave in a surface of a body of water (102) has at least one wave generating object (12, 150) with at least one wave generating surface (13, 152), drive means (108, 110) for causing the wave generating object to oscillate along a path (106), with the wave generating object in contact with the body of water for at least some of the time. When there is a single wave generating object (12, 150), the wave extends away from the wave generating object and when there are multiple wave generating objects (12, 150), the wave generating objects (12, 150) and wave generating surfaces (13, 152) are configured such that substantially all of any waves generated extend away from the wave generating objects.

Abstract: A wave generating apparatus (100) for generating at least one wave in a surface of a body of water (102) has at least one wave generating object (12, 150) with at least one wave generating surface (13, 152), drive means (108, 110) for causing the wave generating object to oscillate along a path (106), with the wave generating object in contact with the body of water for at least some of the time. When there is a single wave generating object (12, 150), the wave extends away from the wave generating object and when there are multiple wave generating objects (12, 150), the wave generating objects (12, 150) and wave generating surfaces (13, 152) are configured such that substantially all of any waves generated extend away from the wave generating objects.

Abstract: A mining system to convey mined materials (eg., coal) from a mining machine (10) to a remote location has a crushing unit (20) receiving the mined material from the mining machine (10) via a surge bin (21). The material is crushed and sized and mixed with water to form a slurry in a pumping unit (30). Slurry pipes (41-43) interconnect pumps (31-33) on the de-watering unit (50) to convey the slurry to the de-watering unit (50) from which it can be conveyed by fixed conveyors (60) to the remote location. The slurry pipes (41-43), and return water pipe(s) (51), have intermediate portions (41a-43a) suspended from a monorail (106) and/or mounted on a sled (206), and flexible end portions (41-43a, 41c-43c) to allow advance off the mining machine (20) along gateroads (101) and/or crossroads (103) in the mine.