Abstract: Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished using two groups of charges which are contained in protective pressure chambers which are arranged radially around the outside of the wellbore casing. The pressure chambers form longitudinally extending ribs which conveniently serve to center the casing within the well bore. One group of charges is aimed inward in order to perforate the casing. A second group is aimed outward in order to perforate the formation. In an alternative embodiment, only one group of bi-directional charges is provided.

Abstract: The present invention involves a pack-off system for use in packing off an area of interest within a wellbore. The pack-off system comprises at least two packing elements disposed on a tubular body. The packing elements of the present invention comprise overlapping leaves which are pivotally mounted on the tubular body. The present invention further involves a method for using the pack-off system, wherein the packing elements are placed adjacent to an area of interest within a wellbore. The overlapping leaves of the packing elements are extended radially to effectively obstruct fluid flow in the annular space between the outermost portions of the packing elements and the wellbore. The bulk of the fluid introduced into the wellbore is trapped between the packing elements and is thereby forced into the area of interest.

Abstract: A GTL facility for a fixed offshore hydrocarbon production platform which comprises a deck attached to a base that is secured to the sea floor. The GTL facility comprises a syngas reactor for converting natural gas into syngas and a liquids production unit for converting the syngas into a hydrocarbon liquid. Furthermore, at least one of the syngas reactor and the liquids production unit comprises a catalyst which is constructed using PI micro-reactor technology. As a result, the GTL unit is sufficiently small to be located on the deck of the platform.

Abstract: A device in the riser-tensioning device or a vessel (1), in which a wire (30) is connected to a riser (8) and extends from the riser (8) up to and over pulley wheels (18′, 18″) and on to a wire-tensioning device (22), the two parts of the wire (30) extending in opposite, essentially horizontal directions out from the pulley wheels (18′, 18″).

Abstract: Methods and apparatus for installing electrically heated composite umbilicals within subsea flowlines containing produced hydrocarbons as immersion heaters to prevent waxes and hydrates from forming within the subsea flowlines that could block the flowlines. The electrically heated composite umbilicals may be installed, or retrofitted, into existing subsea flowlines. Such retrofitted electrically heated composite umbilicals provide an alternative for previously installed, but failed, permanent heating systems. A hydraulic pump installed on the distant end of an electrically heated composite umbilical also provides artificial lift for the produced hydrocarbons. Other electrically heated umbilicals used as immersion heaters are described. Such immersion heater systems may be removed from the well, repaired, and retrofitted into flowlines without removing the flowlines. Near neutrally buoyant electrically heated umbilicals are described which may be installed great distances into flowlines.

Abstract: The invention relates to jet devices for extracting oil from wells and intensifying the oil influx rate. An output cone, a packer and a jet pump are mounted on a tubing string. One or several active nozzles are arranged inside the pump body, and a stepped pass channel provided with a mounting seat for a pressure-sealing unit which is disposed between stages and several channels for supplying a pumped-out medium are embodied inside said pump body. The axes of the nozzles are disposed in a parallel position with respect to the axis of the pass channel at a certain distance therefrom. The inventive device is provided with a radiator and a receiver-transducer of physical fields mounted on a cable in such a way that it is replaceable by other instruments. Said cable passes through the axial channel of the sealing unit which is arranged in such a way that it is successively replaceable by functional inserts such as a testing and depression inserts etc.

Abstract: Apparatus and method for controlling pressure surges in a wellbore. One embodiment provides a downhole surge control tool equipped with a fluid motivator. The fluid motivator may be, for example, any type of motor or a venturi. The fluid motivator motivates wellbore fluid through a bypass channel formed in the tool and then out an exhaust port of the tool.

Abstract: An electrical actuator is particularly suited for driving a wellhead valve for regulating the flow of natural gas from a production well. The electrical actuator can be driven using the existing local power supply in wellhead valve systems, typically a solar panel and a battery. The electrical actuator may include a gear reduction train, a brake and a manual input override with clutch protection. The electrical actuator can be configured in three different operational modes that provides a predetermined position upon power loss including fail-bias fixed, fail open and fail bias closed.

Abstract: A process to transport a blow out preventer for a drilling rig having a drawworks wherein the blow out preventer is transported between a storage area and a use position over a wellbore. The process includes the steps of connecting an upper connector end of an elongated running tool to the drawworks of the drilling rig. The elongated running tool is moved in position parallel to the wellbore using the drawworks of the drilling rig. The running tool is lowered so that a stab connection is made between a lower connector end of the running tool and the blow out preventer. The blow out preventer is thereafter moved over and in alignment with the wellbore.

Abstract: An apparatus for releasably connecting a wireline to a downhole tool comprises a connector having a first member adapted for connection to the downhole tool and a second member adapted for connection to the wireline. A plurality of locking elements are constrained to engage the first and second members by a moveable release member, where the plurality of locking elements maintain the first and second members in a connected position when the moveable release member is in a first locked position. An electromechanical actuator moves the moveable release member to a second released position, releasing the plurality of locking elements from engagement with the first and second members. This allows the first and second members to release the wireline from the tool.

Abstract: There is disclosed a method of forming a tubing lined borehole, the method comprising the steps of forming a borehole; enlarging part of the borehole by increasing the diameter thereof; and locating bore-lining tubing in the borehole with at least part of the tubing located in the enlarged part of the borehole, and a corresponding a tubing lined borehole.

Abstract: Disclosed is an energy absorbing compound comprising an epoxidized vegetable oil, a thermoplastic polymer and a prepolymer. The energy absorbing compound is a polymeric compound which exhibits low rebound velocity and hysteresis. The energy absorbing compound possesses good energy-attenuating properties and is capable of absorbing repeat shocks without structural damage.

Abstract: A sprinkler head cover including an end wall and a side wall extending from and around the end wall to form a cavity therebetween. The cavity is sized for receiving a deflector and arms of a sprinkler head. The side wall is adapted for engaging the sprinkler head to thereby releasably mount the cover to the sprinkler head.

Abstract: A non-electrically actuated ganged fire extinguisher system for use in an enclosure of a size larger than the capacity of a single pre-engineered fire extinguisher comprises at least two pre-engineered fire extinguishers positioned at spaced locations in the enclosure. An actuation valve is mounted on the outlet of each fire extinguisher. A fluid operated valve actuator for each valve retains the valve in a closed state when the actuator is pressurized and opens the valve when the actuator is depressurized. A vent line connects the valve actuators and provides fluid communication therebetween, such that the actuators are maintained at the same pressure state. At least one non-electrical temperature sensor is mounted in fluid communication with the vent line. The temperature sensor opens an outlet to the vent line and releases the pressure therein when the temperature in the vicinity of the sensor reaches a predetermined value indicative of a fire hazard.

Abstract: A better structure of fire-fighting bomb which refers on the moment of producing huge amounts of gases on explosion by the gunpowder room on shooting the bomb, by utilizing the pressure of huge gases to better the operation of said fire-fighting bomb which increases the mutual reaction time of chemical reactants in the internal space of the bomb to complete the reaction and elevate the efficiency of inhibiting combustion substances produced by chemical reactions such as the liquid containing huge amounts of carbon dioxide bubble; wherein when the bomb hits the target, the inhibiting combustion substance produced by the bomb is sprayed out to the target fire source to achieve the purpose of extinction of fire.

Abstract: A portable tool comprising a spindle defining a longitudinal axis, a spring extending around the spindle in the axial direction for biasing a component of the tool, a stop ring extending around the spindle and against which the spring bears. The spindle includes a plurality of circumferentially spaced radially outward projections and the stop ring includes on its internal surface a corresponding plurality of recesses extending from the bearing face of the stop ring to an opposite face, and a corresponding plurality of pockets open at the opposite face. During assembly, the stop ring is fitted over the spindle or sleeve by the passing the recesses over the projections and then rotating the stop ring to align the pockets with projections. The stop ring is axially fixed on the spindle by the pockets engaging the projections under the biasing force from the spring.

Abstract: A Swiveling Valve Operator Mounting System assembly that consists of a mounting frame that has telescoping components. A turntable or thrust bearing is attached to the mounting frame the turntable bearing also being attached to a truck or trailer bed, and allows rotational motion of the mounting frame relative to the truck or trailer bed. A bearing plate is mounted onto the truck or trailer bed and allows a series of wheel assemblies to bear against the bearing plate to allow smooth rotational motion of the Swiveling Valve Operator Mounting System assembly. The mounting frame has rotation locks that engage holes defined in the bearing plate, and angularly lock the mounting frame into position. The swiveling valve operator mounting system also contains tabs integrated into the bumper or rear of the vehicle or trailer that acts as stops, preventing any unwanted vertical movement of the mounting system while in transit.

Abstract: An electric screwdriver is disclosed to include a main body, a socket, an actuator, a switch, and a wrenching portion. The actuator is installed inside the main body, which has a front end and a rear end. The socket is rotatably positioned at the front end of the main body and is connected with the actuator. The switch is mounted on the main body. The wrenching portion is positioned at a position in proximity to the front end of the main body.

Abstract: A presently-preferred embodiment of a cover for a ball-grid array connector comprises a top member and a first and a second side member adjoining opposing ends of the top member. The first and the second side members each have a mating feature formed thereon for engaging a housing of the ball-grid array connector by way of a respective complementary mating feature formed in the housing so that the cover is movable between a first and a second position in relation to the housing.

Abstract: An outer-coating layer of a signal cable is sandwiched and is fixed between a rear end portion of a cylindrical member and a step portion of the inner diameter of a substrate fixing portion. A slip stop fixes the outer-coating layer in the pull-out direction. An electro-magnetic shielding layer is fixed by a fixing nut and is sandwiched and is fixed between a side end portion of a camera head portion in a pipe member and a step portion of the inner diameter of the cylindrical member.

Abstract: A connection box system comprising an anchor configured to be removably secured to a fixture for delivery of a signal to a consuming device. The anchor may have a first engagement mechanism. A connection box may be configured to house lines proceeding from a signal source and terminating in the connection box for connection to the fixture. A receiver may be configured in association with the connection box to receive and retain the anchor. The receiver may have a second engagement mechanism to engage the first engagement mechanism of the anchor when the anchor is inserted therein without the aid of tools. Likewise, a face plate may be attached to the electrical fixture or connection box using clips hidden behind the surface thereof, without the use of tools. The clips may contact and retain the face plate by connecting to one or several engagement regions on the back face of the face plate.

Abstract: The invention provides nanocomposites comprising a clay and an organic compound, in which the clay is a clay bridged by a metal compound, preferably iron oxide and/or aluminum oxide. The organic compound is preferably a polymer. The clay-based nanocomposites of the invention have good mechanical properties and good heat resistance. The invention also provides cables comprising such a nanocomposite, preferably in their sheath or outer coating. Finally, the invention provides a process for producing said nanocomposite.

Abstract: An assembly is provided having a first circuit board and a second circuit board, each circuit board having a plurality of electrical connection points, electrical connection points on the first circuit board being connected to specified electrical connection points on the second circuit board by solder structures, the first and second circuit boards being stacked with respect to each other and with a defined standoff distance there between, the assembly comprising one or more stops having an inserted portion placed between the first and second circuit board along the perimeter of at least one of the electrical circuit boards, the inserted portion of each of the stops having a fixed, predetermined height.

Abstract: A circuit board comprises a base film that is a base layer, a first conductive circuit manufactured by hardening conductive paste material formed in a predetermined shape on the base film, a first insulating layer manufactured by hardening insulating paste material formed on the base film and the first conductive circuit, and a second conductive circuit manufactured by hardening conductive paste material in a predetermined shape on the first insulating layer, wherein an electronic part built-in by the first insulating layer and second insulating layer is connected to the second conductive circuit, and the first conductive circuit is connected to the second conductive circuit through a via hole.

Abstract: The present invention has for its object to provide a process for manufacturing multilayer printed circuit boards which is capable of simultaneous via hole filling and formation of conductor circuit and via holes of good crystallinity and uniform deposition can be constructed on a substrate and high-density wiring and highly reliable conductor connections can be realized without annealing.

Abstract: A waveguide which is particularly suitable for transmitting electrical signals between or to and/or from electronic circuits, for example between integrated circuits disposed on a printed circuit board, has an over-voltage protection region. The over-voltage region of the waveguide region is specifically formed by the actual geometric configuration of the waveguide.

Abstract: A composite of at least two flat elements that includes a first support substrate having a first solder pad, and a second support substrate having a second solder pad that is soldered together with the first solder pad. Strip conductor structures are applied to the first support substrate and the second support substrate and a link area that connects a solder shunting area with the first solder pad, wherein the link area is narrower than the first solder pad and the solder shunting area.

Abstract: A method of forming a printed circuit board with a metal power plane layer between two photoimageable dielectric layers is provided. Photoformed metal filled vias and plated through holes are in the photopatternable material, and signal circuitry is on the surfaces of each of the dielectric materials connected to the vias and plated through holes. A border may be around the board including a metal layer terminating in from the edge of one of the dielectric layers. Copper foil with clearance holes is provided. First and second layers of photoimageable curable dielectric material are on opposite sides of the copper. Patterns are developed on the first and second layers of the photoimageable material to reveal the metal layer through vias. Through holes are developed where holes were patterned in both dielectric layers. The surfaces of the photoimageable material, vias and through holes are metallized by copper plating, preferably using photoresist.

Abstract: A boring tool moves having a pitch orientation, a yaw orientation and a roll orientation and is steerable underground using the roll orientation. A maximum drill string curvature is established for steering. The boring tool is advanced over a path segment. An averaged roll characteristic is determined for movement of the boring tool along the path segment. A path segment pitch orientation is established based on at least one measured pitch orientation along the path segment. Using the maximum drill string curvature in combination with the averaged roll characteristic and the path segment pitch orientation, the yaw orientation is determined. The averaged roll characteristic is determined based on a series of incremental roll measurements that are spaced across the path segment. A set of coupled ordinary differential equations is used to characterize movement of the boring tool.

Abstract: An expandable reamer apparatus and methods for reaming a borehole, wherein a laterally movable blade carried by a tubular body may be selectively positioned at an inward position and an expanded position. The movable blade, held inwardly by blade-biasing elements, may be forced outwardly by drilling fluid selectively allowed to communicate therewith by way of an actuation sleeve disposed within the tubular body. Alternatively, a separation element may transmit force or pressure from the drilling fluid to the movable blade. Further, a chamber in communication with the movable blade may be pressurized by way of a downhole turbine or pump. A ridged seal wiper, compensator, movable bearing pad, fixed bearing pad preceding the movable blade, or an adjustable spacer element to alter expanded blade position may be included within the expandable reamer. In addition, a drilling fluid pressure response indicating an operational characteristic of the expandable reamer may be generated.

Abstract: A drill bit (1) comprises, on its face, either only curved cutting edges (2) or a combination consisting of at least one straight cutting edge (2′) and at least two curved cutting edges (2). The cutting edges (2,2′) on the face of the drill bit (1) are arranged such that they start from the axis (4) of the drill bit (1) or end directly adjacent thereto. Three channels (10) start from a blind hole (5) serving to attach the drill bit (1) to an anchor rod of an injection boring anchor, and their openings (11) are not located in the area of the face of the drill bit (1) but are situated in the area of the lateral surface (13) of the same, said lateral surface conically expanding toward the cutting edges (2, 2′). The openings (11) of the channels (10) are placed in the area of concave recesses (12) of the lateral surface (13) of the drill bit (1) in such a manner that they are recessed with regard to the periphery of the face of the drill bit (1).

Abstract: In a combination weighing device, weight measurement devices are respectively connected to pool hoppers and weighing hoppers. When the results of a combination calculation indicate that a combination is not complete, a control unit determines whether or not a total value of a weight value from predetermined weighing hoppers and a weight value from pool hoppers that supply articles to the weight hoppers exceeds a predetermined value. Thus, an over-scale state in the weighing hoppers can be avoided by supplying additional articles stored in the pool hoppers to the weighing hoppers. The present invention—provides a combination weighing device that is capable of improving operational efficiency.

Abstract: A method and system for authenticating the sender of a mailpiece is described for identifying certain mailpieces as originating from known trusted senders. In one configuration, biometric information and/or biometric metadata is captured when a user writes on a mailpiece with a digital pen. That data is then compared to reference data in a database. Registrant data is then loaded into storage device on the mailpiece and may be digitally signed and/or encrypted by the trusted third party. In another configuration, a mailpiece includes the signature of a sender and the biometric data includes authentication data obtained from the signature that is compared to the biometric data related to the signature obtained during a sender registration process.

Abstract: In a ventilation system of a motor vehicle, a film valve can selectively open and close an air path opening defined by a housing with a rib or projection that encircles such opening. The rib can define a point contact between the film valve and the housing when viewed in cross-section. The rib geometry can include substantially straight edges in cross-section and/or can include arcuate edges. Different geometry can define the rib at different cross-sections. The point contact defined between the rib and the film valve substantially reduces noise generated when the film valve moves relative to the rib, especially when the film valve has been subjected to a harsh environment.

Abstract: A freestanding self-propelled device for moving objects. The device includes a chassis having lower frame portions and upright frame portions. A single motor-driven drive wheel is centrally located between the lateral ends of the chassis and coupled to the chassis so as to be pivotable about a substantially vertical axis. The drive wheel is located between sets of support wheels coupled to the lower frame portion of the chassis. In combination, the drive wheel and the support wheels result in the device being freestanding. The drive wheel projects below the sets of support wheels so that the device is supported by the drive wheel and by only one of each set of support wheels at any given time, thereby establishing a three-point contact with the surface supporting the device. A tiller equipped with controls is pivotably coupled to the drive wheel for pivoting the drive wheel about its vertical axis.

Abstract: A cooling system for an electric motor of a vehicle comprises an electric motor which drives the vehicle, a reduction gear which adjusts a driving force of an output shaft of the electric motor and transmits the driving force to a drive shaft, and an in-shaft refrigerant passage provided in a shaft of the reduction gear and the output shaft of the electric motor. In the cooling system, a refrigerant which has passed through the in-shaft refrigerant passage is collected outside a motor case housing the electric motor, and is circulated.

Abstract: A battery powered shuttle car (10) incorporates features and components that facilitate use and operation and effect efficient application in a mining environment. The shuttle car (10) incorporates at least one battery (20) that is secured to the vehicle frame (11) between one of a left front wheel (17) and a left rear wheel (17) or the right front wheel (17) and the right rear wheel (17). A battery change-over mechanism (51) facilitates battery replacement. Additionally, the shuttle car (10) may be provided with an integral discharge end (81) having a substantially fixed height (82). A full load indicator mechanism (83) provides an indication when the conveyor (16) is substantially full to maximize use and operation of the shuttle car (10).

Abstract: A drive system of a motor vehicle comprising a combustion engine with a crankshaft, an electric polyphase machine and a polyphase power electronics unit for the electric machine. Said electric machine is designed as a starter, generator, or starter-generator, and is seated on the crankshaft of the combustion engine or an extension of the crankshaft. Said power electronics unit is located at the combustion engine and axially and radially to the electric machine. The electric machine and the power electronics unit are electrically connected by means of rigid electric lines.

Abstract: A hybrid vehicle includes an internal combustion engine, an electrical motor, and a drive wheel associated with the electric motor. The drive wheel has a hub, and an axle extending into the hub. The hybrid vehicle also includes a rechargeable battery, and a power circuit for driving the electric motor by drawing power from the rechargeable battery. An electronic torque management unit controls the internal combustion engine and the electric motor. The electric motor is reversible and includes a ferromagnetic pack mounted on the axle for forming a stator within the hub of the drive wheel, and a rotor is mounted adjacent the stator within the hub of the drive wheel.

Abstract: A control device for a vehicle including a motor, an engine, wherein the motor can be drivingly connected with the engine, a torque converter, a transmission mechanism for transmitting the drive torque, which is transmitted via the torque converter from the engine and the motor, to drive wheels, and a controller that controls a driving state of the motor, controls a driving state of the engine, and outputs a torque reduction command for controlling a drive torque of the motor in order to place the drive torque of the motor within a maximum input torque of the transmission mechanism, wherein the maximum input torque is calculated based on a torque ratio of the torque converter when the engine begins driving after the motor begins driving.

Abstract: A rotational shaft receives drive power from an engine and a first motor, and drives front wheels through front clutches. A second motor drives rear wheels. The first motor and the second motor are supplied with electric power from a battery. A main ECU controls an electric vehicle mode in which the first clutches are disengaged, the supply of fuel to the engine is stopped, and the second motor drives the rear wheels to propel a hybrid vehicle, by dividing the electric vehicle mode into a first propulsion mode and a second propulsion mode. In the first propulsion mode, the first motor is de-energized. In the second propulsion mode, a load imposed on the second motor is greater than that of the first propulsion mode, and the first motor is supplied with electric power to rotate the rotational shaft at a predetermined speed.

Abstract: There is provided a body construction of an electric car, in which a flat floor construction of the car body allowing batteries to be easily built therein and removed therefrom and to be accommodated under the floor in a space-effective manner is formed and in which power lines are rationally wired.

Abstract: An agricultural vehicle includes a chassis and a cab supported on the chassis by means of a support system which maintains the cab level. The support system comprises two pairs of hydraulic actuators. Each pair of actuators is operative to tilt the cab relative to the chassis about a respective one of two mutually inclined axes. The two actuators of each pair are connected to a common pumping element in such a manner that whenever the volume of hydraulic fluid in one of the actuators in the pair is reduced, the volume of hydraulic fluid in the other actuator of the same pair is correspondingly increased.

Abstract: When a constant speed running control is released during a changing operation of target vehicle speed, a target vehicle speed in just before the changing operation of target vehicle speed is set to a target vehicle speed at the time when the constant speed running control is resumed.

Abstract: A snowmobile assembly including a snowmobile chassis having a motor compartment at a front portion and an endless belt channel at a rear portion. A motor is located substantially in the motor compartment substantially in front of the endless belt channel. The motor includes at least one fuel control mechanism arranged toward a front portion of the snowmobile chassis. By arranging the at least one fuel control mechanism toward the front portion of the snowmobile chassis, the snowmobile assembly provides for greater mass centralization and/or a lower center of gravity than it would otherwise have if the at least one fuel control mechanism arranged toward the rear t portion of the snowmobile chassis. The greater mass centralization and/or a lower center of gravity can also be achieved by arranging the at least one exhaust port toward the rear of the snowmobile chassis. A drive train couples the motor to an endless belt drive shaft located in the endless belt channel.

Abstract: In a two-wheeled motor vehicle in which a front fork including a pair of telescopic fork legs disposed on opposite sides of a front wheel, and a top bridge and a bottom bridge which connect upper cases of the fork legs to each other at two points vertically spaced apart from each other, is steerably supported by a head pipe at a front end of a vehicle body frame assembly, and a steering handlebar is connected to an upper end of the front fork, part-mounting fixtures (45L, 45R) for supporting a front part (37) disposed in front of the steering handlebar (22) are detachably mounted on the upper cases (32) of the front fork (21). Thus, the front part can be mounted easily with an increase in degree of freedom of the disposition thereof.

Abstract: An articulate vehicle comprises a first frame disposed at one of front and rear portions of the vehicle and a second frame disposed at the other of front and rear portions of the vehicle. The first frame supports a first transaxle apparatus supporting a first axle. The second frame supports a second transaxle apparatus supporting a second axle. Proximal ends of the frames with respect to the vehicle are coupled to each other through a coupling part so that the first and second frames are rotatable relative to each other around a vertical axis according to steering operation. An engine is mounted on the first frame. A first hydraulic motor is integrally assembled in the first transaxle apparatus so as to drive the first axle. A working vehicle is equipped at a distal side of the second frame with respect to the vehicle. A second hydraulic motor is integrally assembled in the second transaxle apparatus so as to drive the second axle.

Abstract: The present invention relates to a safety device for lifting a bonnet (1) of a motor vehicle in the event of a collision, this device being situated under the said bonnet (1) and comprising a mechanism (2) for lifting the said bonnet (1) and a gas generator (31), the said bonnet (1) comprising a structure allowing it, in normal operation, to be opened or closed about an axis (10) known as the rotation axis. This device is characterized in that it comprises an actuator (3) comprising mechanical means actuated using the said gas generator (31) and able to deploy the said lifting mechanism (2).

Abstract: The invention relates to a device to prevent the formation of solid matter due to projections on an air outlet, for example that of an armored vehicle, located near to such projections.

Abstract: An all terrain vehicle (“ATV”) with a frame and only four wheels suspended from the frame is disclosed. Two of the wheels are front wheels and two of the wheels are rear wheels. The front wheels define a front axis and the rear wheels define a rear axis. The front axis and the rear axis define a wheelbase of greater than 51 inches, and each wheel includes an ATV-type tire. The ATV has two shock absorbers connected to the frame. The shock absorbers are associated with the rear wheels. A power unit for driving at least one of the wheels is disposed on the frame. The ATV also has a straddle-type seat disposed on the frame, and handlebars for steering at least one of the wheels disposed on the frame.