39results about How to "Reduce the acceleration of gravity" patented technology

The present invention relates to an escape device, involving a tube, a rail member, and a sliding unit. The tube, extending along a longitudinal direction, is provided with an exit end and intermittently with a plurality of escape openings. The rail member includes a plurality of sliding tracks sequentially connected to one another, wherein the neighboring sliding tracks are connected to each other by associating a relatively wide first end with a relatively narrow second end, the second end facing the exit end of the tube. The sliding unit comprises a deformable member which is adapted to slide on the rail member and configured to be pressed against by the second ends of the sliding tracks such that a slide resistance is generated to reduce sliding velocity. Therefore, the effects for the reduction of descending velocity as well as rapid and safe escape are achieved.

The invention discloses a movable suspended protection rib plate supporting structure for a roadway. The movable suspended protection rib plate supporting structure comprises upper baffles, side baffles, an anchor rod, a top rotating shaft, side rotating shafts, an elastic slice and limiting elastic slices. One ends of the upper baffles are hinged to the top rotating shaft and the other ends of the upper baffles are hinged to the side rotating shafts, and the upper ends of the side baffles are hinged to the side rotating shafts. The upper end of the anchor rod is anchored at the top of the roadway, and the lower end of the anchor rod is hinged to or fixedly connected with the top rotating shaft, the top rotating shaft is arranged along extending direction of the roadway, and the upper baffles hinged to the two sides of the top rotating shaft form a reversed-U shape or a reversed-V shape. The two sides of the elastic slice are separately and fixedly connected with the lower surfaces ofthe upper baffles hinged to the two sides of the top rotating shaft, the limiting elastic slices are of C-shaped structures and are arranged on the lower surfaces of the upper baffles connected with the side rotating shafts and the inner side faces of the side baffles, and one sides of the limiting elastic slices are fixedly connected with the lower surfaces of the upper baffles or the inner surfaces of the side baffles. The movable suspended protection rib plate supporting structure can effectively overcome the defects of a traditional roadway supporting structure, and can effectively protectroof falling and rib spalling of a mine roadway and a temporary traffic tunnel.