Abstract: The structure of lay board according to the present invention is composed of a front board, a middle board, and a rear board. Those three boards are pin-jointed by several pivots, one pad is installed on each board and several wheels are installed at the bottom such that the chassis can be easily accessed or a tool can be easily taken while maintaining or repairing a vehicle. Besides, since the lay board is foldable, not only maintenance man can sit or lay on it during maintenance or repairing, but the space for storing is saved as well. The lay board according to present invention is thus a multiple purpose appliance.

Abstract: A door and panel dolly apparatus has a frame having a telescoping center frame member with a perpendicular wheel frame member on one end and a perpendicular panel support frame member on the other end. Both the wheeled frame member and the floor support frame member have a pair of generally perpendicular panel support post extending therefrom and a swinging door clamp attached thereto. Each swinging panel clamp is positioned to swing from an open position to a closed clamping position for clamping a panel between two clamps or against a perpendicular clamp post. The pair of swinging panel clamps are each attached to a clamp post and have a rod with a clamping surface on one end thereof for threadedly adjusting each of the swinging clamps to clamp a panel of different widths. Each swinging panel clamp is a toggling clamp mechanism.

Abstract: A wheel for rolling bags and associated assembly methods are provided. The wheel includes a non-inflatable outer tire, a plurality of segments positioned inside the tire concentrically about an axis of the tire and supporting an inner surface of the tire, and first and second rims capping first and second openings in the tire, respectively, and supporting the plurality of segments.

Abstract: A trolley includes a frame which is constructed having storage elements and moving elements. The storage element is adapted to allow equipment to be stored therein and the moving element allows the trolley to be easily moved with or without any equipment stored thereon.

Abstract: Method of allowing control of a vehicle provided with at least two wheels in case of puncture of a tire, each wheel having a rim and a tire associated therewith, including the steps of inflating each tire to an operating pressure at a reference temperature; admitting a fluid compressed to a first pressure higher than the operating pressure of the tire at the reference temperature into at least one tank associated with at least one of the rims; bringing the tire into communication with the tank when the inner pressure of the tire is lower than the operating pressure by a predetermined first threshold value; measuring the inner pressure of the tire with a predetermined frequency; calculating a variation of the inner pressure in the time unit; generating an alarm signal when the variation of the inner pressure corresponds to a reduction and is higher than a predetermined value; and transmitting the alarm signal to the driver.

Abstract: The present invention provides a passive vehicle suspension system providing optimal camber gain and avoiding the “bump camber” problem. This vehicle suspension system utilizes a conventional sway bar and a kinematic system to rotate the tire(s) of a vehicle in a direction opposite the roll of the vehicle during turning or cornering, for example. The kinematic design allows for adjustability and optimization, providing optimal camber gain. Although an automotive vehicle suspension system is illustrated and described, and, specifically, a racing or everyday automotive vehicle suspension system, the concepts of the present invention are capable of much broader applicability.

Abstract: A walker device for assisting an individual with mobility which is temporarily convertible to a wheeled transportation chair, includes a frame structure having two front legs and two rear legs supported or rotatable wheels. A seat is attached to the frame structure. A backrest is selectively disposed in a front position for a rearward seating condition or in a rear position for a forward seating condition. A footrest assembly is optionally attached to the frame structure and is adapted to pivot about first and second pivoting axes parallel to each other, between a folded position and an unfolded position.

Abstract: A stabilizer bar includes at least one bushing that is adapted for mounting to a vehicle structure. A crimp ring is secured to the stabilizer bar to prevent relative axial movement between the bushing and the stabilizer bar. The crimp ring initially has a horse-shoe or C-shape that allows the crimp ring to be easily slid onto the stabilizer bar right next to the bushing. The crimp ring is then deformed around the stabilizer bar to permanently secure the crimp ring to the stabilizer bar.

Abstract: An independent suspension for a steerable wheel of a mining vehicle and a suspension unit. The wheel of the mining vehicle is mounted to a frame via the suspension unit alone. The suspension unit comprises an outer tube attached to the frame and an inner tube arranged partly inside the outer tube, the hub of the wheel being attached to the lower part of the inner tube. The inner tube may move in a longitudinal direction as required by suspension movements and, further, the inner tube may be rotated about its longitudinal axis to steer the wheel. The suspension unit is further provided with hydropneumatic members for producing suspension movement and dampening.

Abstract: A bicycle shock absorber and methods for differentiating between rider-induced forces and terrain-induced forces includes a first fluid chamber having fluid contained therein, a piston for compressing the fluid within the fluid chamber, a second fluid chamber coupled to the first fluid chamber by a fluid communication hose, and an inertial valve disposed within the second fluid chamber. The inertial valve opens in response to terrain-induced forces and provides communication of fluid compressed by the piston from the first fluid chamber to the second fluid chamber. The inertial valve does not open in response to rider-induced forces.

Abstract: A bicycle shock absorber and methods for differentiating between rider-induced forces and terrain-induced forces includes a first fluid chamber having fluid contained therein, a piston for compressing the fluid within the fluid chamber, a second fluid chamber coupled to the first fluid chamber by a fluid communication hose, and an inertial valve disposed within the second fluid chamber. The inertial valve opens in response to terrain-induced forces and provides communication of fluid compressed by the piston from the first fluid chamber to the second fluid chamber. The inertial valve does not open in response to rider-induced forces.

Abstract: The present invention relates to a push chair for elderly or disabled adults, of the type formed of two tubular sides, with a seat and a backrest with collapsible structure fixed between them, capable of being brought closer and farther by means of two pantograph-shaped crosspieces interposed between them, characterised in that the two sides are simultaneously moved close and folded, in such a way that the front wheel of each side is placed in vertically aligned position above the back wheel.

Abstract: An open center trailer with spring suspended axels which straddle a detached cargo bed, which was loaded on the ground, said trailer level lifts the cargo bed by pulling said cargo bed up its channel ramps to an elevated transport height, and consequently level lowers and detaches from this load bed at another location. This load may be a cargo utility platform, or an enclosed cargo box, or a horse traveling compartment, or a dump bed, or a highway light, or a traffic speed sign.

Abstract: A hitch coupling features a hitch ball receiving socket, a guide body connected thereto and a mounting body extending from the guide body at an end opposite the socket. The guide body features two generally vertical side walls horizontally spaced apart adjacent the socket and diverging horizontally away therefrom and a ramping surface defined between the two generally vertical side walls extending upward away from the mounting body toward the socket. The sloped ramping surface encourages mating of the hitch and socket under the weight of a trailer. A rear wall of the socket extends downward toward the ramping surface to block inadvertent withdrawal of a hitch ball. When the coupling is not in use, access to the socket can be blocked by a unique anti-theft device that is removable to avoid interference with subsequent use of the sloped ramping surface.

Abstract: A stroller utilizes a handle folding assembly and a front frame folding assembly for a compact, easy storing folded size. An axle of the handle folding assembly rotates when a wrench is operated with single hand and two first sliders are brought to approach axially to each other and detach from two fastening elements, making the handle rotatable and folding to a rear frame. A button of the front frame folding assembly is pressed with single hand (or a seat is detached from a seat bracket) to detach a second slider of the front frame from a roller to make the front frame rotatable and folding to the rear frame. The position pins accompanied with a plurality of position holes enable the stroller an adjustable height of a seat and the handle.

Abstract: A safety lock mounted on an umbrella stroller comprises at least a release actuator movably mounted on a pair of push bars of an umbrella baby stroller, an articulated joint mounted with the umbrella baby stroller, a latch member for locking the articulated joint, an associating member for connecting between the release actuator and the latch member, and a resilient member for keeping the latch member biased in a locked position. The umbrella baby stroller may include an upper frame, a lower frame connected to the upper frame by the articulated joint, and a spread mechanism pivotally connected between the upper frame and the lower frame. When the spread mechanism is unlocked, the safety lock shall stop any further folding in longitudinal direction, and the user can complete the full folding in longitudinal direction if only if to pull the release actuator to unlock the safe lock.

Abstract: A mobility device includes at least a first front leg and at least a first rear leg connected to the first front leg connected to the first front leg. The first rear leg includes an upper member having a first end a second end and a lower member having a first end and a second end. The first end of the upper member is pivotally connected to the first end of the lower member, and the lower member is preferably pivotal between an extended use position and a folded storage position.

Abstract: The present invention is an improved shopping cart with retractable legs that allows the cart to be loaded into a vehicle while contents remain in the shopping cart basket.

Abstract: The present invention is directed to a wheeled luggage item with an ergonomic telescopic handle assembly. The ergonomic telescoping handle assembly of the present invention allows a user to use the luggage using just one hand. Furthermore, the ergonomic telescoping handle assembly shifts the weight of the bag onto the bag, rather than the user's arm, reducing strain on the user's arm, and it provides for a greater space between the user's heel and the bag, reducing the chance that the user will kick the bag while walking. Finally, the ergonomic telescoping handle assembly of the present invention is stored compactly within the luggage, maximizing the volume available within the luggage for storage of personal items.

Abstract: The invention relates to a trailer, comprising a U-shaped frame with a pole and with two legs each provided with a wheel, as well as a platform, drive means and guiding means, for the up and down movement of the platform parallel to the frame. The minimal three guiding means are embodied as two under a 45 degree angle slanted profiles that can move along two wheels that are attached to the frame, and drive means are accommodated in an also under a 45 degree angle slanted central profile that connects the platform to the U-shaped frame.

Abstract: An interior trim material for a vehicle has a base member, a band-like plate, and a cloth material, which is formed by applying double stitches on at least the band-like plate and the cloth material. The band-like plate is provided with a projecting portion formed in a longitudinal direction on the based member side and a cored bar inserted into the projecting portion, the base member is provided with a first groove portion capable of accommodating the whole band-like plate and a second groove portion engaging with the projecting portion of the band-like plate, the cloth material and the band-like plate are simultaneously sewn together in a disposition region of the band-like plate, the double stitches are applied on the cloth material, and the band-like plate sewn together with the cloth material is positioned on respective groove portions of the base member to be joined to the base member.

Abstract: A vehicle knee bolster assembly including a cross member extending laterally across a vehicle and a knee bolster including a frame having a closed cross sectional configuration with a hollow interior. The knee bolster further has a plurality of partition walls dividing the interior of the frame so as to form, together with the frame, a plurality of inner frames each having a closed cross sectional configuration and a hollow interior. The plurality of inner frames define at least two crush zones that collapse sequentially as the knee bolster is forcibly deflected.

Abstract: A webbing guide mechanism includes an upper webbing guide (58) and a lower webbing guide (60) that are disposed on the side portion of a seat back (30) of a front seat (24) that is a tumbling seat. A webbing (50) is wound in a looped manner on these guides (58, 60). The webbing (50) is pulled forward and a loading/unloading space (78) is easily enlarged by sequentially changing the seat back (30) from a standard state to an inclined state and then to a tumbled state. According to the invention, a webbing guide mechanism is provided which can easily secure, without troubling a passenger, loading/unloading space behind the front seat (24) when the passenger climbs into or out of the space or when the passenger loads items into or unloads items from the space.

Abstract: A seat belt apparatus includes a belt reel having a belt wound thereon, a motor for driving the reel to take up the belt; a control section for adjusting an amount of electric current supply to the motor to thereby control a belt-taking-up driving force of the motor, a current detection section for detecting the current supplied to the motor, and a rotation detection section for detecting a rotational position of the reel. The control section includes a constant current control section for executing a constant current control mode so that the current supply to the motor takes a target value, and a target current supply value change section for changing the target value when a detection signal from the rotation detection section has satisfied a predetermined condition in the constant current control mode.

Abstract: The self-adhesive label (3) is provided on a web of siliconised polyester liner (4) and has a base label (30) with an upper printable surface and a lower adhesive coated surface and at least one patch of release material (38) located between the base label (30) and the web of siliconised polyester liner (4). By forming the patches of release material (38) on the adhesive surface of the base label (30) and then applying a siliconised polyester liner (4) over the patches (38) and the exposed adhesive surface of the base label (30), the resultant self-adhesive label is more robust and as the siliconised polyester liner (4) has a substantially continuous upper surface, the risks of snagging as a result of edges and windows in the web of backing material is avoided.

Abstract: The present invention generally provides a writing pad. The writing pad has a grouping of pages of paper, a generally rigid backing substrate for supporting the grouping of pages of paper, and a connector rotatably connecting the backing substrate to the grouping of pages of paper. The grouping of pages of paper has a first side, a second side and an edge, and the pages of the grouping of pages of paper are joined toward the edge thereof. Further, since the connector is rotatably connected to the backing substrate, the connector allows the backing substrate to be rotated about the edge of the grouping of pages of paper such that both sides of the pages of paper can be written on at different times with a supporting backing substrate thereunder. Preferably, individual pages of paper can be removed from the grouping.

Abstract: In order to provide more secure binding of physical media, activation and deactivation mechanisms for media binders are presented. As such, internal spine clamp deactivation mechanisms for deactivating a spine clamp in a media binder are presented, the mechanism including: a tension sheet configured to operate the spine clamp in response to opening the media binder in a range of approximately 270 to 360 degrees (°), normally, greater than approximately 270°; a tear line disposed along the tension sheet and oriented along the spine clamp wherein when the tension sheet is torn at the tear line, the spine clamp is deactivated. In some embodiments, the mechanism further includes a cosmetic sheet disposed between the tension sheet and a cover of the media binder for providing a cover for the spine clamp such that when the tension sheet is torn, the spine clamp remains covered.

Abstract: A book grip comprises a lower grip body formed with a first support projection, and defined with an upper grip body insertion opening; a upper grip body formed with a second support projection, having a lower end slidably inserted into the upper grip body insertion opening of the lower grip body, and defined with a page fastening clip installation hole; a handle installed on a rear surface of the lower grip body; a fastening string having one end supported by the second support projection and the other end extending over a distal end surface of the first support projection and supported by a length adjustment screw; and a page fastening clip having an elastic support part which supports a wide area of a page and a coupling part which is coupled into the page fastening clip installation hole of the upper grip body.

Abstract: A coupon for providing an incentive for a user to participate in physical activity. The coupon detects the physical activity of a user and indicates to the user when the threshold of physical activity has been reached. Once the coupon has indicated that the threshold has been reached, the user may redeem the coupon for a reward.

Abstract: A label assembly that includes a face sheet with at least one label shape defined by one or more tearable lines of separation, a back sheet adjacent to the face sheet, and an adhesive material disposed between the face sheet and the back sheet. The back sheet has a removable panel disposed over the label shape adhesive material and a registration structure aligned with the label shape. The registration structure is raised or raisable above the back sheet to allow an object for labeling to be positioned against the registration structure for proper alignment with the label. Once positioned against the registration structure, the object can be rolled over the adhesive coated back of the label to apply the label to the surface of the object.

Abstract: A label assembly including a carrier sheet and label sheets, including a first sheet and a second sheet and defining at least one label portion. The label portion is adhesively bonded to the carrier sheet and removable with respect to the carrier sheet. A label comprises a first sheet having a first outer periphery and a second sheet having a second outer periphery. The first outer periphery may be coextensive with the second outer periphery. At least a portion of the first sheet is adhesively bonded to the second sheet by a first adhesive. The label further includes a second adhesive at least partially covering a back surface of the label. When the label is in a mounted position with respect to an object, the second adhesive contacts a surface of the object. Voids and/or openings within the label, or any part thereof, may be aligned with or over certain areas on a surface of an object to allow visual and/or physical access to such areas on the surface of the object.

Abstract: A label assembly that includes a face sheet with at least one label shape defined by one or more tearable lines of separation, a back sheet adjacent to the face sheet, and an adhesive material disposed between the face sheet and the back sheet. The back sheet has a removable panel disposed over the label shape adhesive material and a registration structure aligned with the label shape. The registration structure is raised or raisable above the back sheet to allow an object for labeling to be positioned against the registration structure for proper alignment with the label.

Abstract: A rotary leadthrough for an assembly is disclosed. The rotary leadthrough includes a stator having a first fluid channel; a rotor connectable to the assembly for rotation in common around an axis of rotation and having a second fluid channel cooperating with the first fluid channel; first sealing elements on either side of the first fluid channel and the second fluid channel, the first sealing elements bearing sealingly against the rotor and the stator; second sealing elements on either side of the first fluid channel and the second fluid channel, the second sealing elements bearing sealingly against the rotor and the stator; and first leakage channels. Each first leakage channel leads away from a respective space defined by the first sealing element and the second sealing element on the same side of the first fluid channel and the second fluid channel, the rotor and the stator.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) assembly comprising an HVAC system having an air box with a wall having an inside, an outside and an opening, a collar extending through the opening in the wall, with the collar including a base flange and a cylindrical wall extending from the base flange, the cylindrical wall including a hook member, the base flange abutting the inside of the wall and the cylindrical wall extending through the opening in the wall, and a flexible hose having a corrugated cylindrical and flexible shell, corrugated cylindrical and flexible shell having an inside and an outside, the flexible hose being connected to the collar by inserting the cylindrical wall of the collar into the inside of the shell, with the hook member of the cylindrical wall of the collar extending into grooves on the inside of the shell.

Abstract: A clamp for coupling mating radially projecting flanges, each flange having a coupling surface and a tapered face remote from the coupling surface. The clamp comprising at least a pair of component halves, each half comprising a general U-shaped cross-sectional profile having a base portion and two opposing side limbs projecting from the base portion defining a recess intermediate the side limbs for receiving the mating radially projecting flanges and means for fastening the component halves together. The recesses face each other defining a central aperture therebetween. Each side limb has one or more distinct faces comprising face and a non-contact face and the base portion has a non-contact face. The contact faces of the side limbs are remote from the non-contact face of the base portion.

Abstract: A bushing (58) has an entry portion (68) which is secured to a urinal housing (50) and an exit portion (70) which faces a drain pipe (54, 54a, 54b). The entry portion interior surface (74) is fittable about and sealingly grips the urinal exit tube (52). The interiors of the entry and exit portions lie on a common axis (58x) and with the axis (52x) of the urinal exit tube. These axes define a sloped incline and, thus, a built-in, gravitationally-directed downwardly-disposed inclination. Because the axes usually do not fall on the axis (56x) of the conduit, they are angled and offset from the conduit axis. The offset of the bushing raises it above the axis of the conduit. Tubing (60, 60a) is secured at its end (62, 62a) to the bushing exit portion so that the tubing axis at its end (62, 62a) similarly is raised above the conduit axis. The tubing extends from the bushing at an incline that is determined by the built-in incline of the bushing.

Abstract: A clampless tube connection is disclosed, wherein at least one of a conduit and a tube has integrated sealing and locking features.

Abstract: A pipe joint consisting of the end portions of pipe sections (1, 2) to be joined together, said end portions having a collar (3, 4) preferably protruding substantially perpendicularly, and of flange parts (8, 9) placed on different sides of the collars relative to the junction and tightened by means of suitable fastening elements, such as screws (10) and nuts (11). The flange part (8, 9) has been arranged to be adaptable against the shoulder of the collar (3, 4), most suitably against its back surface (6, 7), at least when the joint is being tightened.

Abstract: A flanged pipe coupling for connecting together two pieces of pipe, the coupling having a flat circular flange having an upper surface and a lower surface, the flanged pipe coupling further having a cylindrical portion of lesser outer diameter than that of the circular flange and extending upwardly from the upper surface of the circular flange, the outer diameter of the cylindrical portion being preferably less than the diameter of the hole through the floor, the cylindrical portion having an upper end with a first bore therein for receiving a first pipe therein, the cylindrical portion having an lower end with a second bore therein for receiving a second pipe therein, the cylindrical portion being provided with an internal flange projecting inwardly between the bores and having an internal diameter less than the outer diameter of the pipes to be connected together.

Abstract: Combustion devices described herein comprise a compliant combustion chamber wall or segment. The compliant segment deforms during combustion in the combustion chamber. Some devices may include a compliant wall configured to stretch responsive to pressure generated by combustion of a fuel in the combustion chamber. A coupling portion translates deformation of the compliant segment or wall into mechanical output. One or more ports are configured to inlet an oxygen source and fuel into the combustion chamber and to outlet exhaust gases from the combustion chamber.

Abstract: An aircraft starting and generating system includes a first starter/main machine assembly that includes a first exciter and a first main machine, and second starter/main machine assembly that includes a second exciter and a second main machine. The system also includes a permanent magnet generator (PMG) that is connected to the first and second starter/main machine assemblies. The system further includes a first inverter/converter/controller (ICC) that is connected to the first starter/main machine assembly and to the PMG, and a second ICC that is connected to the second starter/main machine assembly and to the PMG.

Abstract: An apparatus controls a state of charge (SOC) of a battery mounted on a vehicle provided with an internal combustion engine driving a generator mounted on the vehicle. The generator charges the battery. In the apparatus, a setting unit sets a target value directed to controlling the SOC of the battery such that the target value is higher as an efficiency of the internal combustion engine depending on the number of rotations of the engine is higher. A determining unit determines whether the vehicle is in a decelerated state. A controlling unit controls a state of rotation of the generator to enable the generator i) to perform regeneration when it is determined that the vehicle is in the decelerated state and ii) to perform generation to enable the SOC of the battery to be the target value when it is determined that the vehicle is not in the decelerated state.

Abstract: A wave energy device converts the motion of waves on a body of water into a usable form of energy, for example a flow of pressurized water or an electrical current. The device includes a buoyant body for tracking the rise and fall of the wave and a working surface coupled for movement with the buoyant body and which is designed to capture and convert both heave and surge forces of the waves. The device includes a rapid deployment and retrieval capability and a capability to rotate to accommodate changes in wave direction. The device is universally attached to the sea floor, which allows the device to pitch, yaw and roll with the wave forces from any direction, thereby reducing the likelihood of damage due to extreme weather or damage to or from marine traffic in the event of an encounter.

Abstract: A method for operating an electrical machine includes coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to and from the electrical machine. The method also includes configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time.

Abstract: The invention relates to Method of operating a wind turbine, wherein rotor windings of an induction generator, which comprises stator coils coupled to a voltage grid, fed with rotor currents by a feed-in unit are driven by a rotor of the wind turbine; wherein the frequencies of the fed-in rotor currents are controlled depending on the rotor rotation frequency and the feed-in unit is electrically decoupled from the rotor windings in the case predetermined variations of the grid voltage amplitude and the rotor current feed-in is resumed after the decoupling caused by the variation of the grid voltage amplitude, when the currents generated in the rotor windings by the variation have declined to a predetermined value.

Abstract: A wind turbine includes a rotor having a hub, at least one rotor blade coupled to the hub, and a rotor shaft coupled to said hub for rotation therewith. The wind turbine also includes an electrical generator coupled to the rotor shaft, and a generator-side frequency converter electrically coupled to the electrical generator for converting variable frequency AC received from the electrical generator into DC. The generator-side frequency converter is electrically coupled to an electrical load and is configured to at least one of supply reactive power to the electrical load and absorb reactive power from the electrical load. The wind turbine also includes a grid-side frequency converter electrically coupled to the generator-side frequency converter for converting DC received from the generator-side frequency converter into fixed frequency AC.

Abstract: A method of controlling the output power from a wind energy installation to a utility grid (7) having a specified nominal frequency (fN) is provided, in which the output power (P) is controlled depending on the actual grid frequency (f) in the utility grid (7) such that the output power (P) is reduced when the grid frequency (f) exceeds a predetermined value. The predetermined value is at most two per mill higher than the nominal frequency (fN) of the grid (7) and the output power (P) is reduced as soon as any increase of the grid frequency (f) above the predetermined value is detected.

Abstract: A wind energy installation and a method of controlling the output power from a wind energy installation to an electrical grid with a specified nominal grid frequency are provided, in which the output power is controlled as a function of the time derivative of the grid frequency.

Abstract: A method and apparatus for harnessing power associated with ocean waves and converting that power into electricity. The apparatus is a buoy that houses a vertically oriented central shaft, a pendulum, and a generator. As the buoy tilts from the vertical under the influence of wave motion, the pendulum is accelerated and rotates about the central shaft. A centrally-placed generator is mechanically coupled to, and driven by, the rotating pendulum so that the pendulum's kinetic energy is converted into electricity. The electricity may be stored at or near the buoy or transferred to a remote facility. Moreover, a fin array located along the bottom of the buoy serves as an anti-torque mechanism and improves the operational efficiency of the electricity production. The method involves employing use of the centrally located generator and the fin array to efficiently harness wave power.

Abstract: An improved tidal and river energy converter having a semi-submerged device designed to harvest energy from the tidal and river sites. Each device is connected to other like devices to form an interconnected array of tidal and river energy devices that are anchored to the shore at right angles to the prevailing tidal and river current. Each device is composed of a supporting floatation hull attached to a submerged strut supporting an air compressor driven by a slow rotating propeller. The air compressor is connected through a streamlined mooring system to the other air compressors in the array and those in turn are connected to a high pressure line leading underwater to an onshore air turbine electric generator connected to the local power grid.