The present disclosure relates to an overhead rail system having a pair of parallel rails, mountable to an overhead structure, and a rack line fixedly mounted underneath each rail. A pair of chariots is mounted on the pair of parallel rails. Each chariot has upper and lower bearings rollably connecting the chariot to a respective one of the pair of parallel rails. The bearings allow longitudinal movement of the chariot along a length of the parallel rails while limiting movement of the chariot in other directions. Each chariot has a pinion configured to engage respective rack lines. A drive system is operatively connected to the pinion of at least one of the chariots.

The present disclosure relates to an overhead rail system having a pair of parallel rails, mountable to an overhead structure, and a rack line fixedly mounted underneath each rail. A pair of chariots is mounted on the pair of parallel rails. Each chariot has upper and lower bearings rollably connecting the chariot to a respective one of the pair of parallel rails. The bearings allow longitudinal movement of the chariot along a length of the parallel rails while limiting movement of the chariot in other directions. Each chariot has a pinion configured to engage respective rack lines. A drive system is operatively connected to the pinion of at least one of the chariots.

An inflatable dam sized to secure to a foundation structure. The inflatable dam includes a double layered flexible membrane extending with an inner membrane and an outer membrane, the double layered flexible membrane including a port configured to facilitate inflation and deflation of the inner membrane such that, upon inflation of the inner membrane, the outer membrane is configured to expand with inflation of the inner membrane, the outer membrane including a reinforcement element embedded therein.

An inflatable dam sized to secure to a foundation structure. The inflatable dam includes a double layered flexible membrane extending with an inner membrane and an outer membrane, the double layered flexible membrane including a port configured to facilitate inflation and deflation of the inner membrane such that, upon inflation of the inner membrane, the outer membrane is configured to expand with inflation of the inner membrane, the outer membrane including a reinforcement element embedded therein.

An opening/closing device according to the present invention includes a gate, a fall prevention unit, a support release unit, a first float, a floating prevention unit, a second float, and a floating prevention release unit. The gate receives a flow of fluid, and is able to fall down toward a downstream direction of the flow. The fall prevention unit supports the gate, thereby preventing the gate from falling down. The support release unit releases the support for the gate by the fall prevention unit. The first float is arranged on an upstream side of the gate, is arranged on one of the left side and the right side of the gate viewed from upstream, and is less in the specific gravity than the fluid. The floating prevention unit prevents the first float from floating.

The disclosure provides a high-efficient swift stepless layering water intaking gate device, is including setting up the water intaking gate slot of the relative setting of the inlet port both sides on the dam body, its characterized in that: a plurality of sections of door leaves are arranged in the water taking gate groove from bottom to top; all the door leaves in the water intaking gate groove are divided into a group, and the adjacent door leaves are connected by adopting an internode connecting plate to form an integral water intaking gate; or all the gate leaves in the water intake gate groove are divided into a plurality of groups to form a plurality of sets of stop log type water intake gates, each set of stop log type water intake gate is provided with a plurality of sections of gate leaves.

The invention relates to improved water control gates and related inflatable actuators, and associated sealing, manufacture and operation apparatus and methods. Advancements in technologies related to air fitting design, inflated bladder stress relief, inflatable bladder strength enhancement, water gate related slide friction mitigation, abutment and other impounded water seals, gate panel fabrication, traffic accommodating water impoundment structures, and water gate panel system operation efficiency, as well as nappe aeration, hinges, and bladder manufacture technology are disclosed herein.

The invention relates to improved water control gates and related inflatable actuators, and associated sealing, manufacture and operation apparatus and methods. Advancements in technologies related to air fitting design, inflated bladder stress relief, inflatable bladder strength enhancement, water gate related slide friction mitigation, abutment and other impounded water seals, gate panel fabrication, traffic accommodating water impoundment structures, and water gate panel system operation efficiency, as well as nappe aeration, hinges, and bladder manufacture technology are disclosed herein.

According to one embodiment, a flood vent includes a frame configured to form a fluid passageway through an opening in a structure. The flood vent further includes a panel configured to be coupled to the frame in the fluid passageway so as to at least partially block the fluid passageway through the opening in the structure. The flood vent also includes one or more connectors configured to couple the panel to the frame. The one or more connectors are further configured to uncouple the panel from the frame when 0.5-5.0 pounds per square inch (PSI) of pressure is applied to a portion of the panel by one or more of a fluid or an object carried by the fluid, so as to reduce an amount of blockage of the fluid passageway provided by the panel.

An Herodotus machine, or bottom-source, up-stair, hybrid pump and step lock system, includes synchronized reciprocating cross-gate displacers with commonly synchronized gates and floating body movers; specifically including a sequence of ascending adjacent step locks separated by gates with reciprocating gears on axles aligned over respective gates. A chain over each reciprocating gear has a displacer on each end, with one displacer in the upper lock and the other displacer in the lower lock. Rotating first, the downstream displacer descends to raise the lower lock water level, while the upstream displacer rises to lower the upper lock water level, and vice versa on the reverse gear rotation. Displacers are sized such that water levels in alternate pairs of upper lock and lower lock are made the same. The gate is then opened and a watercraft can be transferred from the lower lock to the upper lock or vice versa.