Abstract: Apparatuses, systems, and methods for transporting logs through a debarker are shown and described. The disclosed embodiments of roller assemblies can be used for quickly and conveniently moving logs along a processing line. Some disclosed embodiments include fluted rollers that carry replaceable inserts. The inserts can protect the logs and the rigid flutes of the roller. The insert can be made of a wear resistant material for a prolonged life. A worn insert can be replaced with another insert to ensure proper functioning of the roller assemblies.

Abstract: A portable supporting frame for a cutting machine includes a leg frame, a tabletop frame, and a frame locker. The leg frame includes two opposing pairs of first and second supporting legs. The tabletop frame includes two table arms pivotally connected to the first crossed legs respectively. The frame locker is used for locking the top ends of the second crossed legs to the table arms respectively to retain the portable supporting frame at a set up position. When the frame locker is released, the tabletop frame is adapted to pivotally fold at 180° to overlap on the folded leg frame at a folded position.

Abstract: A work bench (10) including at least two work piece supports (57), the two supports are positioned at intervals along an elongate member (24) and define a substantially horizontal plane in which a work piece can move, a mounting (20) for a power tool (12), the mounting is affixed to the elongate member and can rotate about an axis that is substantially parallel to the length of the elongate member, a ground engaging member (106) which supports the power tool mounting at a point spaced away from the elongate member and adjustment means for adjusting the effective length of the ground engaging member.

Abstract: The invention is a pre-conformed cover consisting of panels of a relatively strong flexible material assembled in a conformation that can protectively stretchedly cover and lockedly secure one or more hair clippers on a hair clipper rack. A locking means that has at least one first grommet positioned in an edge panel of the pre-conformed cover, and at least one strap terminated with a second grommet, where the at least one strap is attached to an opposing edge panel of the pre-conformed cover, such that by extending the strap, a lock can pass through the first and second grommet. Exemplary of a strong flexible material is rip-stop nylon, heavy-duty cloth, reinforced scrim plastic film, and ballistic cloth. The pre-conformed cover can be further comprised of pre-extended elastic strips or bands sewn in the edges panels.

Abstract: A run-flat tire of improved load bearing capacity after being punctured is disclosed. The tire has two circumferential sidewalls, at least one circumferential intermediate wall interposed between the sidewalls, and a transverse base extending from one sidewall to the other and defining a compartment between a sidewall and an adjacent intermediate wall or between two adjacent intermediate walls. Each compartment is adapted to assume an expanded symmetrical configuration when an adjacent sidewall or intermediate wall is punctured. A carcass portion is provided within each sidewall, each intermediate wall and base. A shock absorber is provided in the vicinity of a junction connecting each intermediate wall to the base. A padding element is affixed to the inner liner portion applied to the bead wrap of each intermediate wall.

Abstract: A plasticizing system used for plasticizing a diene rubber composition is based on an MES or TDAE oil and on C5 fraction/vinylaromatic copolymer resin, in particular a copolymer of a C5 fraction and of styrene resin. A rubber composition exhibiting an improved abrasion and cut resistance is based on at least a diene elastomer, a reinforcing filler, a crosslinking system, and a plasticizing system comprising between 5 and 35 phr of an MES or TDAE oil and between 5 and 35 phr of such a resin. A tire is formed of the above mentioned rubber composition. A process for preparing such a composition, use of said composition for the manufacture of a finished article or of a semi-finished product intended for a motor vehicle ground-contact system, in particular a tire and a tread of such a tire.

Abstract: A pneumatic tire having shoulder blocks defined on a shoulder side of the tread surface by lateral grooves extending in the widthwise direction of the tire beyond a ground contact end of the tire, the shoulder blocks being arranged in the circumferential direction of the tire. A bottom-raising portion is provided only on a bottom of every other lateral groove of the lateral grooves. Two shoulder blocks adjacent in the circumferential direction of the tire are connected by the first bottom-raising portion.

Abstract: An attachment system for a snow chain is disclosed, comprising a rolling track (1, 2a, 2b, 12) joined to a plurality of connecting arms (3) converging towards a common central structure (4), wherein a plurality of elastic ropes (5) forming elastic attachments between said plurality of connecting arms (3) and an anchoring ring (7) fixed to a rim (C) of a wheel, and wherein at least an inextensible linear element (9) is further provided, which may be engaged with or disengaged from a working position in which it is apt to replace the elastic attachment of at least one of said elastic ropes (5) with an inextensible attachment.

Abstract: A combination wheel and valve assembly has a plurality of spokes each having at least one aperture through a rim-end thereof. A rim has an inner surface and a spoke mating element opposite the inner surface. A plurality of through-holes extend through the spoke mating element of the rim. A plurality of bolts are shaped to fit through the aperture of the rim-end of each of the spokes, and into one of the plurality of through-holes of the spoke mating element, to fasten each spoke to the rim. A conduit extends through the inner surface of the rim to one of the through-holes of the rim, such that a valve assembly can extend through the aperture of one of the spokes and engage the through-hole having the conduit, thereby enabling fluid flow through the valve assembly and the conduit to the inner surface of the rim.

Abstract: A radial tire for airplane comprises a pair of bead cores, a radial carcass, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt(N) satisfies Tbelt/WD?1.5×106 when an outer diameter of the tire is D (m) and a width of the tire is W (m), and at least one layer of the belt layers is constituted with an organic fiber cord spirally winding at an angle of approximately 0° with respect an equatorial plane of the tire and satisfying the following equations (I) and (II): ???0.01E+1.2??(I) ??0.02??(II) (wherein ? is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).

Abstract: Apparatus for bonding rubber O-Rings from cord stock, rubber extrusions and extruded tubing materials, consists of heated die-sets, holding fixtures, electronic module, assembly device, spring clamping and pneumatic clamping arrangement. The combined heated die-set and holding fixture are two separable heat conductive blocks having a common interface. Apertures are located across the interface having diameters or matching shapes of extrusions, these apertures are slightly less than the cord or extrusion dimensions, the rubber is axially mated in the open heated aperture, and will stay unlovable when the clamping device is closed. The electronic module controls both a heating and timing device for proper control of maintaining a constant temperature and accurate timing cycle.

Abstract: A laminating apparatus is composed of a thermo compression bonding section, a first bobbin holder and a second bobbin holder. The thermo compression bonding section pulls a laminating film having a member for forming a protective film out from a roll of the laminating film, which is wrapped around a core bobbin in a cylindrical shape, and overlaps the protective film on one surface of a card and thermally compresses the protective film against the one surface of the card so as to be bonded.

Abstract: A tool is disclosed comprising a thin, ribbon-like but semi-rigid material which can be “snaked” in between ductwork and the surface to which it is attached. The tool is configured to enable the temporary attachment of a tape material thereon. Further, the tape material includes a non-adhesive “release tape” attached to the adhesive portion of the adhesive tape. Using the method and apparatus described herein, a user can insert the tape, with the protective tape release thereon, around the ductwork, release the tape and remove the tool, and use the tool as it is being withdrawn to urge the adhesive tape onto the seam being taped.

Abstract: A tire changing machine for changing difficult to mount tires is provided. The machine utilizes various implements configured about the machine's chassis in such a way that they do not interfere with each other's operation. In this way, the machine enables an operator to effectively change various tires.

Abstract: Disclosed is a method for making a non-metallic, fiber-reinforced barrel tube having particular application for use in a barrel system to be attached to a paintball marker in order to direct paintballs propelled by the marker towards a target. A mandrel is first dipped in a releasing agent. The mandrel is then coated with a thin layer of metal (e.g., nickel or chrome) by means of a nano vapor deposition process. Next, a fiber-reinforced resinous sheet is wrapped over the thin metal layer to establish a tube therearound. A heat-sensitive plastic tape is wound around the tubular resinous sheet. The mandrel is heated in an oven to cause the thin metal layer to bond to the tubular resinous sheet. At the same time, the heat-sensitive tape shrinks to squeeze any air bubbles from the resinous sheet.

Abstract: To destructively remove a casting core from a cast part, the part is exposed to a combination of nitric acid and sulfuric acid. The combination may have, by volume, a nitric acid concentration of 4-20 times the sulfuric acid concentration. The combination may be an aqueous solution including, by volume, 40-60% nitric acid and 3-10% sulfuric acid. The method may remove a ceramic casting core and a refractory metal-based casting core. A first leaching step may remove a major portion of the ceramic casting core and may comprise alkaline leaching. A second leaching step may remove a major portion of the refractory metal-based casting core and may comprise acid leaching. The acid leaching may comprise the combination of nitric acid and sulfuric acid.

Abstract: Systems and methods for reducing the potential for riser backfilling during investment casting are provided. In this regard, a representative method for performing investment casting includes: providing a mold having an opening communicating with an interior, the interior having a part cavity and a riser; providing an insert; and using the insert to form a physical barrier to reduce a potential for molten metal to backfill into the riser while the molten metal is introduced into the interior of the mold via the opening.

Abstract: A coring system for producing a flash-free one-piece die-cast body for an electrical connector. The electrical connector of produced by the coring system of the present invention may be used for securing two electrical cables to an electrical panel or electrical box through a single knockout hole. The coring system includes a first core, a second core, and a connecting arrangement for connecting the first and second cores in such a manner that there are no gaps between the joined portions of the two cores. When the cores of the coring system are joined together by the connecting arrangement and placed in a mold, molten metal may be introduced to the mold at the joined area of the two core pieces to form a one-piece flash-free connector body according to the present invention.

Abstract: A method and apparatus is disclosed for casting metals in a DC mold to form an ingot or product having at least two layers formed by sequential solidification. The apparatus has at least one cooled divider wall at the entry end portion of the mold to divide the entry end portion into at least two feed chambers. Metal is fed to the chambers to form an inner layer and at least one outer layer. The divider wall has a metal-contacting surface for contacting the metal for the at least one outer layer, the surface being arranged at an angle sloping away from the metal for the outer layer in a downward direction. The angle is larger at the center of the divider wall compared to the angle adjacent to each longitudinal end thereof. The apparatus is suitable for co-casting metals having similar coefficients of contraction to minimize problems of adhesion between the layers of a resulting ingot or rolled products produced therefrom.

Abstract: A two-phase heat transfer system includes an evaporator unit configured to receive heat from a source, a liquid line fluidly connected to the evaporator unit, a vapor line fluidly connected to the evaporator unit, and a condenser. The evaporation unit includes a thermal capacitance device and an evaporator integrated with the thermal capacitance device.

Abstract: A loop type heat dissipating apparatus with a sprayer for transferring heat between a heat source and a heat sink includes an evaporator, a condenser, and a working fluid. The evaporator contacts the heat source and includes a first chamber, a second chamber, and a sprayer disposed between therebetween. The condenser contacts the heat sink and includes a third chamber communicating with the second chamber and a wick structure disposed on one side of the third chamber. The working fluid fills the loop type heat dissipating apparatus and is turned into microdroplets via a sprayer. The sprayer impinges the microdroplets into the second chamber where the microdroplets are then evaporated by the heat source before proceeding to the third chamber for condensation, liquefaction and adhering to the wick structure. Eventually, the working fluid flows back to the first chamber under a pumping force actuated by the sprayer and completes the cycle.

Abstract: A cooling system for a heat-generating device includes: coolant fluid; an evaporator for holding the coolant fluid and for heating the coolant fluid; said evaporator in close proximity to the heat-generating device for removing unwanted heat. The cooling system also includes a plurality of tubes for providing a flow path for the coolant fluid and gases produced by the evaporator; a heat exchanger through which the tubes pass for cooling the coolant fluid. The heat exchanger includes: a reservoir, a coolant, and a heating element for heating the gas so that it expands and pushes cool coolant fluid back to the evaporator. The heating element may be located inside the reservoir.

Abstract: A precision surface plate has a hollow casing with a reference plane used as a surface on which either or both of a workpiece and mechanical equipment are placed, a honeycomb structure, which is a collection of substantially identically-shaped enclosed cells disposed inside the casing, and a heat transfer device provided in the honeycomb structure to allow cells of the honeycomb structure to communicate with each other and transfer heat. The precision surface plate further includes casing ventilation openings provided in a wall of the casing to allow cells of the honeycomb structure inside the casing to communicate with the outside of the casing, and a shutter for opening and closing the casing ventilation openings. The heat is transferred effectively between the cells of the honeycomb structure through the heat transfer device.

Abstract: Well for production of hydrocarbons, comprising a hole drilled down into an underground, a casing fastened to the hole wall, a production pipe that extends into the casing from the surface and down to a hydrocarbon-containing zone, a hanger on the surface in an upper end of the well, in which hanger the production pipe and casing are hung up and electrically short-circuited, and a packer arranged sealingly and electrically short-circuiting in the annulus between the production pipe and the casing, in or close to a lower end of the well, distinguished in that the well further comprises: a primary coil arranged concentrically about the production pipe, a secondary coil arranged concentrically about the production pipe, a load connected to the secondary coil, and an alternating current generator/signal unit connected to the primary coil.

Abstract: A method of oil production is provided. The method includes forming an injection well and a production well. The method also includes pumping a mixture of oxygen and carbon dioxide (CO2) into the injection well. In addition, the method also includes minimizing gravity segregation by providing a relatively high level of CO2 in the mixture.

Abstract: Methods are providing, including methods comprising providing a liner disposed within a well bore that penetrates a subterranean formation, such that the well bore comprises an annular space between the exterior surface of the liner and the well bore wall; providing a jetting tool disposed within the liner; introducing a stimulation fluid to a treatment interval of the well bore via the jetting tool, such that the stimulation fluid is introduced with sufficient pressure to create or enhance a plurality of perforations in the liner in the treatment interval; introducing a proppant slurry comprising a plurality of resin-coated particulates to the treatment interval of the well bore; and allowing the resin-coated particulates to fill at least a portion of the liner in the treatment interval and at least a portion of the annular space in the treatment interval.

Abstract: A method for fracturing an oil or gas formation. The method includes introducing a gas impulse device into a wellbore followed by pumping a pressurized liquid into a wellbore at a pressure equal to or lower than the estimated fracture pressure of the formation. Finally, the method includes firing the gas impulse device periodically so that the device releases high pressure compressed gas impulses. The impulses when expanding through the pumped pressurized liquid substantially instantaneously increases the fracturing liquid flow rate into the oil or gas formation. It causes the total pressure to exceed the actual fracturing pressure of the formation thereby initiating or extending fractures in the formation stimulating the flow of the oil or gas therefrom into the wellbore.

Abstract: A seafloor pump assembly is installed within a caisson that has an upper end for receiving a flow of fluid containing gas and liquid. The pump assembly is enclosed within a shroud that has an upper end that seals around the pump assembly and a lower end that is below the motor and is open. An eduction tube has an upper end above the shroud within the upper portion of the caisson and a lower end in fluid communication with an interior portion of the shroud. The eduction tube causes gas that separates from the liquid and collects in the upper portion of the caisson to be drawn into the pump and mixed with the liquid as the liquid is being pumped.

Abstract: The device of the present invention is located in a closed containment enclosure surrounding a storage bin and comprises a closed tank (28) positioned on the storage bin containing a liquid (26) and having a fireproof shield enclosing the tank and a liquid level control system for controlling the level of liquid in the tank with the tank (28) comprising at least one opening in communication with the closed container enclosure, and at least one internal chamber in direct communication with the storage bin via a flue pipe and at least one external chamber in direct communication with the containment enclosure via said at least one opening.

Abstract: A quick coupler includes mounting structure for mounting the coupler to a machine, and for mounting the coupler to an implement. The mounting structure on the coupler includes wedge coupling surfaces and a tube. The mounting structure on the implement includes hooks for engaging the tube, and complementary wedge coupling surfaces. The wedge coupling surfaces wedge together during coupling to produce and tight fit and solid hold between the coupler and implement. The mounting structure is robust, and can accommodate future possible wear. The kinematic impact on the performance of the implement due to the use of the quick coupler is minimized.

Abstract: A power tool comprising a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The gear transmission mechanism has a high speed position and a low speed position. The control system is coupled to the gear transmission mechanism for detecting an operating characteristic of the power tool to actuate a ring gear to automatically move from the high speed position to the low speed position and to reduce the rotational speed of the ring gear when the operating characteristic exceeding a predetermined value.

Abstract: A power tool includes a housing, a motor, an output shaft, a gear transmission mechanism and a control system. The gear transmission mechanism is connected between the motor and the output shaft to transmit the rotary power of the motor to the output shaft. The power tool includes a signal generator and a control system electrically coupled to the signal generator and operatively engaged with the gear transmission mechanism such that when the signal generator is manually activated, an electric signal is generated and transmitted to the control system to cause the gear transmission mechanism to vary the gear reduction ratio.

Abstract: A drilling machine is provided for breaking chips formed by drilling action into manageable lengths. The drilling machine comprises a first gear having a first axis of rotation, and a cam follower surface. It has a second gear having a second axis of rotation coincident with the first axis of rotation. A housing is provided configured to support the first gear and the second gear, the housing having a cam surface, a spring and a tool holder spindle having a third axis of rotation. The first and second gears are configured to impart both a linear feed and a rotation to the spindle. The first and second axes of rotation are coincident with the third axis of rotation such that the cam surface is urged into contact with the cam follower surface by the spring. The cam surface and the follower surface are shaped such that when the first gear rotates, the first gear is caused repeatedly to retract and then to advance, breaking chips that are formed.

Abstract: The present invention generally relates to methods and apparatus for improving top drive operations. A method of ensuring safe operation of a top drive includes operating a top drive, thereby exerting torque on a first tubular to makeup or breakout a first threaded connection between the first tubular and a second tubular. The method further includes monitoring for break-out of a second connection between a quill of the top drive and the first tubular; and stopping operation of the top drive and/or notifying an operator of the top drive if break-out of the second connection is detected.

Abstract: A cuttings bed removal tool for use on a drill string in a well bore includes: a sub having a region of enlarged outer diameter over the string diameters indicated by its upper end connection and an indicator disposed downhole of the region of enlarged outer diameter and having at least one bypass port extending through the indicator to permit passage of fluid in an upward direction through the indicator.

Abstract: An apparatus for controlling the direction of drill bit within a wellbore. The apparatus comprises a first housing with a first housing axis therein, and wherein the first housing has a first threaded opening having a first threaded opening axis. The first housing has a helical end. A second housing is included, and the second housing contains a second housing axis, and a second threaded opening having a second threaded opening axis configured to engage with the first threaded opening. A collar is included that has a helical collar end that engages the helical collar end and wherein the helical collar end is configured reciprocal to the helical end, and rotational displacement of the first housing relative to the collar will angularly displace the drill bit axis. The apparatus may further include spline members for locking the collar in place relative to the first and second housing.

Abstract: Drilling systems and methods for enlarging a borehole that include an expandable reamer and an expandable stabilizer axially coupled above the expandable reamer are disclosed. The expandable reamer includes a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending blades carried by the tubular body, and a cutting structure carried by at least one blade of the plurality of blades, wherein at least one blade of the plurality of blades is movable outwardly with respect to the longitudinal axis. The expandable stabilizer includes a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending bearing pads carried by the tubular body, wherein at least one bearing pad of the plurality of bearing pads includes an up-hole cutting structure carried thereupon and is movable outwardly with respect to the longitudinal axis.

Abstract: A drilling and vibratory jarring device is provided. The device has an inner mandrel shiftable upward or downward in an outer housing from an intermediate position in the outer housing. When the inner mandrel is in the intermediate position within the outer housing mating splines, one set of splines attached to inner mandrel, the other set of splines attached to the outer housing, engage and rotatably lock inner mandrel and outer housing together. When the inner mandrel is shifted to the upward position said splines disengage and the saw-tooth surfaces of an upper pair of jars engage creating longitudinal vibratory forces down-hole when inner mandrel is rotated with respect to outer housing. When the inner mandrel is shifted to the downward position said splines disengage and the saw-tooth surfaces of an lower pair of jars engage creating longitudinal vibratory forces down-hole when inner mandrel is rotated with respect to outer housing.

Abstract: The earth boring bit 10 is designed to bore an angular non-vertical hole into underlying strata. The bit 10 includes a plurality of steeply inclined cutting faces or edges 22 that define a relatively narrow included angle A therebetween. The bit's design ensures that the apex of the bit 10 will contact the surface S and/or other hard strata before the radially outwardly disposed gauge portion of the bit 10. This design reduces or obviates drill chattering or “walking” when the bit 10 is used to drill a hole at an angle that is not vertical relative to the surface or strata S. The bit 10 also includes an interchangeable flow control restrictor that optimizes the velocity of fluid pumped through the bit 10 and thus efficiently flushes debris from the hole as the hole is being drilled.

Abstract: A drill, which is used in a hammer drill for drilling holes in stone, concrete and the like, includes a one-piece drilling head (10, 20, 30) formed of a hard material and provided, at its first end (5), with at least one main bit having a tip (4) and at least one cutting structure (3) integral to the one-piece drilling head (10; 20; 30), and at a second end (6) located opposite the first end (5), with a bottom surface (7) for the mounting the drilling head (10; 20; 30) on the drill stem (8), and having a plurality of axially extending through-grooves (11; 21; 31) for removing drillings produced during a drilling process and having a cross-section which increases, at least regionwise, in a direction toward the bottom surface (7) of the drilling head (10; 20; 30).

Abstract: A personal vehicle comprises a frame with a seat, two large, non-drive wheels connected by an axle at one end of the frame, an elongated swing arm attached to the axle, a pair of caster wheels connected to the frame opposite the large, non-drive wheels and a main drive wheel mounted to a fork and connected to the swing arm. The main drive wheel is located central the vehicle frame, intermediate the frame sides and intermediate frame front and rear sections.

Abstract: A hybrid drive for a motor vehicle includes an internal combustion engine and an electric motor, which, together with at least one auxiliary unit, are connected via a belt/chain drive. The internal combustion engine and the electric motor have respective drive elements with unidirectional freewheeling devices for the belt/chain drive, thus automatically achieving a predefined belt/chain speed.

Abstract: A straddle-type vehicle with enhanced heat exhaust efficiency in a transmission case housing a continuously variable transmission. The continuously variable transmission and an engine are arranged forward of a rear wheel 4. An air intake duct introduces outside air into the transmission case and an air exhaust duct exhausts air from the transmission case. The air exhaust duct is connected to and extends upward from a top portion of the transmission case. The air exhaust duct has an air exhaust port that is positioned above the transmission case.

Abstract: To provide an intake structure for a seat type vehicle which makes it possible to shorten the air intake path and to prevent the taken-in air from being heated with the heat of an engine. An intake structure for a seat type vehicle is provided in which an engine and a fuel tank are mounted side by side in the lateral direction of the vehicle under the occupant seats attached onto a frame. An air cleaner is arranged to the rear of the engine with an intake port for the air cleaner being provided under the occupant seats and above the fuel tank.

Abstract: A cooling module capable of reducing vibration in a compartment attributable to the discharge pulsation of the compressor is disclosed. The cooling module comprises a radiator (1) mounted to a vehicle for cooling the cooling water by heat exchange between the cooling water and the air, and a condenser (2) for condensing the refrigerant by heat exchange between the refrigerant circulated in the refrigeration cycle and the air. The radiator (1) is fixed to the vehicle, and the condenser (2) is fixed to the radiator (1) through elastically deformable rubber bushings (3).

Abstract: A vehicle for terrain travel includes a chassis, an operator platform including space for footing, a first isolation mechanism and a second isolation mechanism operably connected between the chassis and the operator platform. The isolation mechanisms are to be placed either below, above or level with the operator platform and at substantially opposite edges of the operator platform. Each isolation mechanism at least partially absorbs motion from the chassis. The isolation mechanisms may be made up of telescopic members, a biasing member or a dampening device. One of the isolation mechanisms may provide pivotal coupling of the operator platform to the chassis and at least partially absorb motion from the chassis.

Abstract: A vehicle lateral-motion apparatus that, under the direction of a user, moves a vehicle to which it is mounted in a generally perpendicular direction to a vehicle axis that extends between the front and rear of the vehicle includes a vehicle lifting assembly for elevating the vehicle above a roadway and lowering the vehicle back to the roadway as directed by a user and lateral-motion assembly coupled to the lifting assembly for displacing the vehicle to one side or the other of the vehicle axis while the vehicle is elevated above the roadway.

Abstract: A motorcycle in which a central axis of a shaft and a central axis of front forks are not parallel to each other, and assembly work of the shaft, front forks and an upper bracket is not complicated. A steering shaft is rotatably supported by a head pipe. An upper bracket supports the steering shaft and front forks. The steering shaft includes upper and lower steering shafts. The upper steering shaft is inserted in the upper bracket and then fixed to the lower steering shaft.

Abstract: A motorcycle is provided with a vehicle body, front and rear wheels, an engine and a power transmission mechanism for connecting the engine to the rear wheel. A centrifugal clutch and a transmission having a plurality of gears are arranged in the power transmission mechanism. A handle is provided on the vehicle body. An accelerator grip is provided on the right side of the handle and a clutch lever is provided on the left side. A shift pedal for changing the transmission gear ratio of the transmission and a side stand are provided on the left side of the vehicle body. A rear brake pedal for braking the rear wheel is provided on the right side of the vehicle body. The motorcycle is also provided with a rotation suppression mechanism for suppressing the rotation of the rear wheel at least when the engine is stopped.

Abstract: An improved electric motor scooter includes: a front frame; a front wheel assembly coupled to the front frame and residing on a surface; a back frame; a back wheel assembly coupled to the back frame and residing on the surface; and a center pivot mechanism coupled to the front frame and the back frame. The center pivot mechanism includes a pivot and a folding axis around which the pivot rotates. The folding axis is not perpendicular to a longitudinal axis of the scooter and is tilted from the longitudinal axis at an angle. A rotation of the pivot in a direction folds the scooter vertically from the surface and moves the back wheel assembly toward the front wheel assembly according to the angle. During the folding, the front wheel assembly and the back wheel assembly each remains on the surface as the pivot rotates.