Sand filter cleaning system
Sea water lifting device
Sea wave energy conversion
Sealing and dynamic operation of a liquid ring pump
Selectively pressurized tank for hydraulic fluid
Self-cleaning submersible pump
Self-regulating deicer valve
Sewage system
Shoreline air compressors wherein swell water pumps the air
Side entry fish pump
Sliding vane pump
Slurry continuous pressure-feeding apparatus
Slurry conveyor device
Slurry pump
Snap action float valve assembly for liquid feeding device
Snap action float valve assembly with reversible plate spring fo
Solar powered liquid metering device
Solar-powered pump
Stable vacuum mounting plate adapter
Start-up for hydrokinetic amplifier