The invention relates to a hydraulic rotator (11) for rotating a tool with respect to a crane arm, the hydraulic rotator comprising a first attachment piece (12) for connection to a crane arm and a second attachment piece (13) for connection to a tool; and a stator (14) and a rotor (15), the rotor (15) being rotatably arranged inside the stator (14) to rotate around an axial axis (A), wherein the rotor (15) comprises vanes (18) that are biased to extend radially outwards from said rotor (15), and wherein the stator (14) comprises an inner circumferential surface (25) to receive said vanes (18), which inner circumferential surface (25) comprises at least two chambers (19a) arranged to receive each vane of said vanes (18) to a first extent, and at least two shallow portions (19b) arranged to receive each vane of said vanes (18) to a second extent, which is substantially less compared to said first extent, wherein said inner circumferential surface (25) is arranged to receive at least a tip portion of the vanes (18) throughout its whole periphery.

The pneumatic drill has member defining an air input and an air output and a housing defining an internal cylindrical chamber having bearing surfaces having a through axis. A driven shaft is coupled to the tool engaging chuck that defines a plurality of longitudinal slots. The driven shaft is disposed within the chamber and has a longitudinal axis offset from the through axis. A plurality of vanes each being partially formed of graphite that are individually disposed within one of the plurality's of longitudinal slots. Two of the vanes, the housing, and the driven shaft define a moving compression chamber.

Prime movers are provided that can include: a fixed member in operational relationship to a rotating member; a reciprocating vane assembly operationally engaged with the rotating member; and a track member about the rotating member and engaging the reciprocating vane assembly. Engines are provided that can include: a stator in operational relationship to a rotor; a reciprocating vane assembly operationally engaged with the rotor; and a track member about the rotor and engaging the reciprocating vane assembly. Processes for powering a prime mover are also provided, the processes can include engaging vanes between a fixed member and rotating member to create compression and expansion zones, the engaging comprising guiding the vanes from a track member about the rotating member.

A pump body assembly, a compressor and an air conditioner are provided. The pump body assembly includes a cylinder assembly, which is connected to a first flange and a second flange respectively and is disposed between the first flange and the second flange; a rotation shaft, which is provided and passes through the first flange, the cylinder assembly and the second flange in sequence, and which is provided thereon with sliding vane grooves; and a sliding vane, which is provided inside the sliding vane groove and fits the cylinder assembly to form a working cavity in the cylinder assembly. The first flange is provided thereon with an exhaust channel which is in communication with the working cavity, and the second flange is provided thereon with a gas flow balance portion.

An arc turbine system includes an elliptical housing, a rotor having two sliding channels positioned centrically to the housing, and two sliding arcs disposed within the rotor sliding channels and slide therein. The sliding arcs are engaging the housing simultaneously at both ends in a near friction-free environment supported by repulsion force of like-pole magnets. Four chambers disposed within two static chambers between the rotor and the long-axis of said housing, the two static chambers further include proper inlet and outlet ports configured to allow fluid and gas flow into and flow out of the static chambers. The system configured in two distinct settings for two distinct uses. 1) To generate dense rotating energy with optimum efficiency, and high power-to-weight ratio by burning fuel and 2) to pump, compress, vacuum, convey, pressurize, turbocharge, allow precision and micro-movement of gas and liquid, conversion of pressurized gas and liquid to rotating energy, all with optimum efficiency, near-zero vibration, near-zero friction, capability of handling all viscous fluids and 100% increased flow rate using dual inlet and dual outlet ports.

The engine comprises an outer shell in the shape of a fixed ring with two lids, an internal rotor with an inlaid central shaft and bearings. On the inner surface of the shell, inlet, compression, explosion and escape chambers are positioned. The internal rotor is endowed with drive axle having a cylindrical body endowed with radial slots which house at least one vane pressed radially against a shell by spring. The outer shell of the Otto engine has a carburetor and a feed duct of the air-fuel mixture. At the start of the explosion chamber the spark plug is positioned. At the end of the explosion chamber an escape chamber with an escape duct is positioned. The outer shell of the Diesel engine has a butterfly valve and an air feed duct. At the start of the explosion chamber a fuel injection spout is positioned, and at the end of the explosion chamber an escape chamber with an escape duct is positioned.

A gas delivery augmenter may include a pump mechanism for facilitating inflation of an inflatable. The pump mechanism is generally configured to be driven/powered by pressure-volume energy from a primary gas received by the gas delivery augmenter, and the pump mechanism of the gas delivery augmenter is configured to entrain a secondary gas deliver the entrained secondary gas (and any remaining primary gas) to the inflatable. The pump mechanism, as described in greater detail below, enables secondary gas to be pumped/delivered to the inflatable even as the inflatable backpressure increases, thus providing improved inflation over conventional aspirators.

A rotary engine having an outer body having an internal cavity with a peripheral wall having an insert opening defined therethrough in communication with the internal cavity, and a plurality of coolant passages defined through the peripheral wall in proximity of the insert opening, a rotor body rotatable within the internal cavity, and an insert removably received in the insert opening of the peripheral wall, the insert having a subchamber defined therein communicating with the internal cavity, with a minimum width of the insert opening being at least 0.75 inches. An outer body for a rotary engine and a method of inspecting in an internal cavity in an outer body of a rotary engine are also discussed; also, a rotary engine including a fuel injector having a tip received in the injector hole of the peripheral wall without protruding in the insert opening.

A rotary engine having an outer body having an internal cavity with a peripheral wall having an insert opening defined therethrough in communication with the internal cavity, and a plurality of coolant passages defined through the peripheral wall in proximity of the insert opening, a rotor body rotatable within the internal cavity, and an insert removably received in the insert opening of the peripheral wall, the insert having a subchamber defined therein communicating with the internal cavity, with a minimum width of the insert opening being at least 0.75 inches. An outer body for a rotary engine and a method of inspecting in an internal cavity in an outer body of a rotary engine are also discussed; also, a rotary engine including a fuel injector having a tip received in the injector hole of the peripheral wall without protruding in the insert opening.

The invention comprises a paddle board apparatus and method of use thereof, comprising: a manual crank connected to a drive shaft, a rotatable housing, and a set of paddle wheels connected to an outer surface of the rotatable housing, where a child manually turning the crank simultaneously propels the paddle board forward in water through use of the paddle wheels and drives an air pump in the rotatable housing to blow bubbles about the paddle board for enjoyment of the child riding the paddle board.