Certain exemplary embodiments can provide a system that comprises a valve coupled to a water supply to a showerhead. The valve is constructed to turn a water flow on and off to the showerhead. The system comprises a first switch mounted outside of a shower stall. The first switch can be constructed to, responsive to a first user action, cause the valve to turn the water flow on.

The invention relates to a method for producing a continuous driving force by providing kinetic energy of a liquid medium by means of bringing about differences in pressure in a closed system that is filled with liquid medium, in particular water, and gaseous medium, in particular air, and relates to a device for implementing the method, wherein the device consists of a vessel (1), which is enclosed on all sides, in which there is inserted an insert (2) that is open on its underside and in which a hollow body (3) with an outlet opening (4) is arranged on the upper side of the insert (2). Within the insert (2), a rotor (8) is arranged on a vertical shaft (7), said rotor (8) being driven by a motor (9). Fitted in the vessel (1) outside the insert (2) are one or more riser pipes (10), which are open at their lower ends and are inserted with their upper ends in the hollow body (3) above the insert (2) in a sealed-off manner.

The invention relates to a method for producing a continuous driving force by providing kinetic energy of a liquid medium by means of bringing about differences in pressure in a closed system that is filled with liquid medium, in particular water, and gaseous medium, in particular air, and relates to a device for implementing the method, wherein the device consists of a vessel (1), which is enclosed on all sides, in which there is inserted an insert (2) that is open on its underside and in which a hollow body (3) with an outlet opening (4) is arranged on the upper side of the insert (2). Within the insert (2), a rotor (8) is arranged on a vertical shaft (7), said rotor (8) being driven by a motor (9). Fitted in the vessel (1) outside the insert (2) are one or more riser pipes (10), which are open at their lower ends and are inserted with their upper ends in the hollow body (3) above the insert (2) in a sealed-off manner.

Various multi-stage radial turbine configurations that provide highly efficient momentum transfer between a fluid and the mechanical interface in both power producing and power consuming undertakings.

Various multi-stage radial turbine configurations that provide highly efficient momentum transfer between a fluid and the mechanical interface in both power producing and power consuming undertakings.

A method of mounting a guide apparatus of a large hydraulic machine with a vertical axis of rotation and wherein the axes of the guide blades extend vertically as well. The method includes the following steps: assembling an assembly with at least the upper guide wheel ring or the turbine cover and all the guide blades of the guide apparatus. This assembly does not take place in the machine shaft and the guide blades are mounted in a suspended manner, lowering the guide blades to mutually different height levels within the assembly such that the lowered guide blades can be displaced upwardly, installing the lower guide wheel ring in the machine shaft, and installing the assembly in the machine shaft by continuous lowering, wherein the guide blades present in the assembly are successively inserted into the openings provided in the lower guide wheel ring.

A fluid turbine 65 is provided, including a rotor 16, including a vertical rotation axis 12, on which at least two rotor blades 18, 20, 22 are arranged, wherein the rotor 16 is arranged within a housing 70, wherein a top 72 and a bottom 74 of the housing 70 are arranged essentially vertical to the rotation axis 12. Each rotor blade 18, 20, 22 has at least a first height 68 at a second distance 69 parallel to the rotation axis 12 and the second height 66 at a second distance 67 parallel to the rotation axis 12, wherein the first distance 69 and the first height 68 are smaller than the second distance 67 and the second height 66, wherein the rotor 16 is rotatable relative to the housing 70. Due to the design of the housing 70, the fluid turbine 65 has particularly high efficiency.

A multi-stage radial turbine for usage in energy capture from fluid streams with low to moderate relative speed.

A multi-stage radial turbine for usage in energy capture from fluid streams with low to moderate relative speed.

Provided are a floating structure fluid dynamic force use system and a wind-propelled vessel which uses the system whereby it is possible to compensate for overturning moment due to fluid dynamic force and to alleviate both tilting and size increases of a floating structure. A floating structure fluid dynamic force use system (1) comprises an assembly (12) which extracts energy from wind or water, and a floating structure (13) which supports the assembly (12). The assembly (12) comprises a wind receiving part (10) which receives fluid dynamic force, and a support column (11) which supports the wind receiving part (10). The assembly (12) is positioned with the center of gravity (15) thereof below the water line and is supported to be capable of tilting in an arbitrary direction upon the floating structure (13).