Abstract: Weft threads are presented to a gripper in shuttleless looms by needles, each guided by at least one straight guide held askew in a needle guide carrier (9). These straight needle guides due to their askew arrangement make sure that all needles together are located in and displaceable in a fan type plane twisted in space. In the working position for presenting a weft thread each needle eye is located on a short line (7) extending approximately in parallel to a gripper path. Thus, all weft threads in their presenting position are close to each other in a narrow presenting zone within the reach of the gripper path for a sure gripping at the beginning of the forward gripper motion. At its beginning the gripper speed is still slow so that the weft threads are gripped gently. The straight needle guides held askew in the at least one guide carrier (9) form a row of guides which is slanted by a given angle relative to the gripper path to form the fan type plane twisted in space.

Abstract: The invention relates to a method of stoppering a pipe, or the like. The method uses a two-compartment flexible container, with one compartment containing an activating agent, and the other a foamable resin. After mixing a nipple is attached to a container wall. The nipple, on one end, has rupturing elements to rupture the wall and the other end is connected to a supply hose whose free end is brought to the desired location in the pipe for stoppering the same with foamed resin flowing from the container.

Abstract: A body is provided with members for coupling it to one end of a bottle or the like. The body has a seat for housing the free end of a syringe, with a hole for allowing for the syringe needle to pass through. The free end of a syringe may be housed and threaded in the seat. On the side opposite surfaces of the body seat and at the syringe end provided for insertion in the seat, there are formed radially projecting longitudinal teeth and slanted resilient fins which are deflected by the teeth as the syringe is threaded to the body. The teeth abut against the fins, thereby preventing the syringe from being screwed off the body.

Abstract: A vessel for receiving fluid includes a flexible part having a closed end and an opening at its opposite end, and a rigid protective cover, the edges of the opening in the flexible part being attached to the rigid cover in a manner such that the inside of the flexible part and the inside of the cover define a closed interior space, the flexible part being capable of being drawn up against the inside of the protective cover upon evacuation of the interior space whereby the flexible part is received within the protective cover. A connection member is provided on the outside of the protective cover, the connection member having a bore therethrough and a perforatable, resilient, self-sealing membrane extending across the bore, through which membrane a puncturing member may be inserted for removing material from or adding material to the interior space.

Abstract: An apparatus for processing wood, comprising a cylindrical drum mounted for rotation about its longitudinal axis, a cutting member, means for mounting the cutting member upon the circumferential surface of the drum such that its cutting edge is positioned a first distance from the drum surface, means for rotating the drum such that the cutting element passes along a circular path concentric to the surface of the drum, a pair of parallel ring sections each having a first and a second end and a substantially uniform cross section, and having an arcuate configuration along their length substantially conforming to the circumferential surface of the surface of the drum, the first ends of the spacing elements being positioned laterally adjacent to the path of travel of the cutting member, and extending in parallel relationship in front of the cutting member such that a gullet is defined in front of the cuting edge by the cutting member, the ring sections, and the surface.

Abstract: A high performance tire, in which the profile of radially outer ground contacting tread surface is radially outwardly expanded at both shoulder parts when the tire is inflated, and the tread pattern circumferential stiffness as well as index of groove volume is optimized so that resistance in wear, durability to high speed running (low degree of heat generation), resistance to cutting, and resistance to rolling (low fuel consumption) including wet grip performance and stability in vehicle driving may be advantageously improved without reducing comfortableness in vehicle riding.

Abstract: A method of mounting dual tires on motor vehicles, in which the tires have lateral grooves in the circumferential direction includes positioning the tires so that the neighboring lateral grooves on the respective tire faces nearest each other have phase differences in the circumferential direction. The phase difference between the neighboring lateral grooves is preferably one half of a pitch and the pitch is preferably smaller than 16 cm, and more preferably smaller than 13 cm.

Abstract: To improve steering controllability and stability, radial tire treads are usually formed with a plurality of inclination grooves arranged on both sides of a tire tread at regular intervals along a tire circumference and extending from both tread ends to a main central circumferential groove at an acute angle with respect to tire equator so as to converge to the tire outer circumference. To further improve the steering controllability and stability on both dry and wet roads, the inclination grooves are formed asymmetrical on both sides of the tie tread. The inclination grooves with a large pitch length P.sub.1 and a small inclination angle .alpha..sub.1 are effective on dry roads, while those with a small pitch length P.sub.2 and a large angle .alpha..sub.2 are effective on wet roads.

Abstract: A rim mount for a tire uniformity machine. The upper rim has bolts that cooperate with keyhole slots in an adaptor to mount the upper rim. The lower rim has keyhole slots that cooperate with bolts threaded into a lower chuck to mount the lower rim.

Abstract: A device for breaking the beads of a tire, such as a farm tractor tire, from the bead seat on a rim, has a pair of jaws that clamp along the edge of the rim, with one jaw forming claws that pry between the tire and the outer flange of the rim. The jaws are clamped in place on the rim, and a pusher member is mechanically, directly actuated through a screw to push the tire substantially transversely to the plane of the rim to push the bead off the rim seat. Mechanical operation is provided, and because the pusher member can be directly operated a substantial force urging the tire bead off the bead receiving seat surface can be generated without having the device slip off the rim.

Abstract: A drapery traverse rod and support assembly including a pulley housing at each end of the rod and a mounting bracket for mounting the pulley housing on a supporting surface. The pulley housing has a bottom wall, upstanding inner and side walls and a front wall and a rod engaging portion for supporting an end of a traverse rod with the rod extending transverse to the inner side wall of the pulley housing adjacent the front wall. The mounting bracket has a rear mounting pad portion and pulley housing support arms extend forwardly from the mounting pad portion and into the pulley housing. The pulley housing support arms have cord guides adapted to guide traverse cords from the end of the rod rearwardly toward the wall, and the mounting bracket has cord guides adapted to guide traverse cords downwardly adjacent the rear mounting pad portion of the mounting bracket.

Abstract: A traverse rod having a lengthwise extending slot at the bottom and forward and rear guide rails along opposite sides of the slot. A master carrier is movable along the rod and includes a carrier body having first and second carrier guide heads extending laterally from opposite sides of the carrier body and the carrier body is adapted to be reversibly mounted in the rod with the first carrier guide head guidably engaging either the forward or the rear guide rail on the rod. A cord engaging means is provided on the first carrier guide head for supporting a traverse cord at a location laterally offset from one side of the carrier body. An elongated arm support bracket is detachably and reversibly mounted on the carrier body so that the arm support bracket can be selectively positioned at either side of the carrier body. A drapery support arm is detachably and reversibly mounted on the arm support bracket so that it can extend from either end thereof.

Abstract: A progressive die process for making medical needles attached to a carrier strip, as well as the product of the process. The process includes steps of forming a flat blank in unitary attachment with a carrier strip and coining edges of the tip of each flat blank, arcuately shaping the blank, and closeably forming the arcuate blank to create a medical needle having a holding portion, a cannulated portion and a tip. In addition, the cannulated portion may be encased for fluid delivery or grooved so the needle may be split.

Abstract: The free energy of a metal which will fill the sinkhead of an ingot mold is calculated by assuming the dimensions of a liner sized to achieve the selected sinkhead volume and calculating the maximum temperature which the liner would achieve upon filling the sinkhead with a molten metal. The free energy is maximized until the mass of the liner is minimized at a calculated temperature less than the melting temperature of the liner. A liner is formed having dimensions corresponding to those of the calculated minimum mass liner. The liner is inserted into a support structure which will rest on the ingot mold.

Abstract: An improved expendable pattern casting process and an improved refractory composition for coating expendable patterns used in the process containing substantially spherical refractory material.

Abstract: A static casting method for a hollow cast product using a mold with bottom comprising a top lid, a core and an outer mold section, the core being attached to the top lid and disposed inside the outer mold section. The outer mold section includes a lateral mold section and a lower mold section. The lateral mold section is formed at its inner peripheral wall portion with a composite cooling section by stacking chiller blocks and interposing therebetween refractory sands and at its outer wall portion with refractory sands. Cooling pipes include first and second pipes. A first pipe extends longitudinally through the refractory sands at the outer wall portion and a second pipe extends longitudinally through the inner wall portion in contact with at least a part of each of the chiller blocks, the first and second pipes being connected at their lower portions through the bend portion. The chiller blocks are cooled by water flowing in the second pipes. The entire casting cavity is first filled with molten metal.

Abstract: A casting powder for use in ingot steel production through bottom pour process is provided. The powder combines the crucial properties of existing bottom pour fluxes and hot topping compounds into a single, easily dispensed mixture. The present invention provides a significant simplifying and savings over present methods while producing steel with fewer impurities.

Abstract: Prior to reaching the nozzle's exit, the belt is pressed from outward against the nozzle by means of a rail supported by springs whereby the mould is reliably sealed off under all working conditions. Pressing the belt against the nozzle can also be achieved by means of pistons or the direct hydrostatic and/or hydrodynamic effect of the coolant from the outside or through various combined measures. In order to reduce friction and wear, the nozzle in the area of contact with one belt can be provided with a wear-resistant coating or wear-resistant inserts. This sealing method enables a casting process with high metallostatic pressure, consequently resulting in a high quality product.

Abstract: A sealed accumulator is positioned at a location remote from the conventional pressurized liquid cooling system of an internal combustion engine. An overflow conduit communicates between a high point in the system and the accumulator. A make-up conduit communicates between the accumulator and a low point in the system. A normally closed pressure valve, opening in response to system pressure exceeding a predetermined value, is in series with the overflow conduit. In series with the make-up conduit, is a normally closed one-way check valve. Minimum and maximum pressures within the accumulator are regulated respective relief valves. Optionally, a vent valve is installed at a high point for escape of air as coolant is introduced into the system.

Abstract: A heat pipe system particularly adapted for use with finned evaporators. In accordance with this invention, a separate liquid working fluid return conduit is provided which communicates with a liquid working fluid distribution means for distributing working fluid uniformly to all of the evaporator fins. Means are also provided in accordance with this invention for storing excess liquid working fluid either as a column of liquid within the liquid return pipe which is developed by a flow restrictor, or by selecting a distribution wick from a material having low capillary pressure which enables it to become saturated with liquid working fluid.

Abstract: A heat recovery system including a closed working fluid loop constituted by connecting an evaporating apparatus supplied with warm waste water, a steam turbine having an output shaft to be coupled to the load, and a condensing apparatus supplied with cooling water, works on the basis of a Rankine cycle and is adapted to utilize a non-azeotropic mixture as the working fluid.

Abstract: Shell-and-tube transfer line heat exchangers are disclosed, having inlet ends with a flow streamlining device comprising, in combination:flared ends, preferably in the form of hollow truncated cones, whose smaller ends are aligned with and mated to the inlet ends of the heat exchange tubes in a conventional transfer line heat exchanger, the ends of these heat exchange tubes being contained within tubesheets, the flared ends extending away from the inlet and tubesheet, andpeaked gas guides, preferably in the form of closed, concave gables having rounded, smooth tops, which rise between the rims or edges of adjacent larger ends of the flared ends and enclose the spaces between these rims or edges.Methods of quenching high temperature gases while recovering useable heat therefrom using these modified transfer line heat exchangers are also disclosed.

Abstract: A spiral heat exchanger composed of two separate pipe systems, wherein each heat exchange medium runs in its own pipe system. The heat-emitting and the heat-absorbing pipe sytems are arranged in a tight, intermeshing fashion, in order to improve the heat exchange between the separate spirals, these are interconnected by employing a medium metal. The medium metal is applied by soldering, by dipping the heat exchanger into molten metal or by casting the molten metal on top of the exchanger.

Abstract: A counter flow heat exchanger comprising a plurality of tubes disposed in a bundle array or tube within tube configuration to enhance heat transfer between high and low pressure tubes in the array or tube in tube configuration. Also disclosed are a method of increasing the heat transfer capacity of a tube bundle heat exchanger and a liquid helium temperature refrigerator or a reliquefier utilizing the heat exchanger.

Abstract: An apparatus for automatically dispensing chemicals into the well bore of a hydrocarbon producing well utilizes a double acting cylinder and piston to sequentially operate a plurality of valves associated with the well. The handles of each valve have a spring steel tine secured thereto which engages with a portion of the piston shaft which actuates the operation of each valve.

Abstract: A plastic well (10) includes a plastic well casing (12) with a hole (16) that is disposed transversely to a casing axis (14). A plastic adapter plug assembly (38) is disposed inside the casing (12) and is forced toward the transversely-disposed hole (16) in the casing (12) by a plastic locking cam (58) that is a part of the adapter plug assembly (38). The adapter plug assembly (38) is supported by a plastic support plate (26) that engages the top (28) of the casing (12), and by a plastic support tube (32) that is bonded to both the support plate (26) and the adapter plug assembly (38). A plastic saddle (18) is disposed outside the casing (12) and is bonded over the hole (16) in the casing (12).

Abstract: Hydrocarbons are produced from a subterranean reservoir by maintaining the effective reservoir pressure below the reservoir crushing pressure during a first production period, causing the effective reservoir pressure to exceed the reservoir crushing pressure after such first production period so as to crush the reservoir and reduce the reservoir permeability, and then producing hydrocarbons from the reservoir during a second production period in which hydrocarbon production is enhanced due to better sweep efficiency as a result of the lowered permeability of the reservoir.

Abstract: The permeability of subterranean oil-bearing formations is controlled by injection of an organic polysilicate ester. The ester may be derived from simple, monohydroxylic alcohols such as methanol, ethanol, propanol or butanol, from diols such as ethylene glycol, from polyols such as glycerol and alkylene oxide polymerization products and from other organic compounds containing functional hydroxy groups, for example, partial ethers and esters of glycols and polyols. The polysilicates are injected into a formation through injection wells, suitably in an amount from 10 to 100% of the pore volume of the zone to be treated. In the formation, the polysilicate esters form gels which selectively decrease the permeability of the high permeability regions of the formation, to divert the flow of flooding liquid used in flooding operations to the less permeable regions of the formation.

Abstract: A proppant composed of particulate material coated with a solid thermosetting resin that can consolidate and cure at tempertures below about 130.degree. F. An acidic catalyst in a solvent system is used to cure the resin underground.

Abstract: An apparatus and method for drilling a bore hole (B) along an underground arcuate path (P) between two surface locations (O,E). The bore hole (B) is drilled in one direction with a drill string (10) having a leading pipe section 12 with a drill bit (14) thereon. Drilling fluid is supplied to the drill bit (14) during the drilling operation. Upon completion of the initial bore hole (B), the hole (B) may be enlarged by a reamer (40). Then, a production conduit (38) is connected to the reamer (40) for being pulled by the drill string (10) through the enlarged bore hole (D). Cement is supplied through the drill string (10) for discharge at the reamer (40) into the bore hole (D) adjacent the leading end of the production conduit (38) and fills the annulus A between the conduit (38) and the inner peripheral surface of the enlarged bore hole (D). In one embodiment (FIG. 12), the drill string (10B) is encased in cement in the initial bore hole (B) and forms a casing for receiving a small diameter production cable.

Abstract: A method is provided for producing at least a first fluid or desired fluid contained in a geological formation this formation further comprising at least a second fluid, or undesired fluid, which risks hindering production of the desired fluid, this latter being produced by means of at least one deflected or substantially horizontal drain.According to this method, a second drain is disposed in said geological formation, this second drain being situtated between the first drain and the undesired fluid for drawing off a part at least of the undesired fluid and allowing the first drain to produce essentially the desired fluid.

Abstract: A sprinkler head is adjustably supported in three dimensions by an assembly including a first bracket having a cut-out and a second bracket having a cut-out. The first bracket has a circumferentially evenly spaced array of three threaded apertures around the cut-out. The second bracket has a similar set of unthreaded holes around its cut-out. Bolts extend through the second bracket and are threaded into the apertures of the first bracket. Nuts on the bolts may be used as stop elements. The second bracket is attached to fingers extending from the downcomer pipe to which the sprinkler head is attached. In a second embodiment, three fingers are provided, and they replace the second bracket. Adjustment of the sprinkler head about two orthogonal axes and along a third orthogonal axis parallel to the downcomer pipe can be achieved by turning the bolts from beneath the false ceiling through which the sprinkler head extends.

Abstract: In the particular embodiments of the quick response sprinkler described in the specification, a sprinkler housing is sealed with a valve plug supported on a deflector which is movable between a closed position and an open position. A thermally responsive element supported from a first lever which engages the valve plug has a plunger supporting a second lever and a third lever maintains the spacing between the first and second levers. When the thermally responsive element is actuated by elevated temperature, the plunger moves away from the levers, permitting the levers to separate and releasing the entire valve-retaining mechanism from the sprinkler housing.

Abstract: A turf coring tool includes a tubular cut out wall section turf coring tine having an upper tubular end for receiving force contained within a socket and having this upper end of the coring tine walls severed with an axial slit from the cut out area, allowing the slit walls to become flexible counter to the axis of the tine. A tube having elastic qualities is placed in the slit section and compressed by a washered screw wrenched into the socket base to allow the distortion of the inserted elastic tube to distort the flexible slit tine walls against the inner walls of the socket. The resultant pressure against the distorted tine walls will allow them to become bound in the socket. Wrenching to relieve the elastic compression will cause the tine to be free and released from socket.

Abstract: The specification discloses an improved row cleaning apparatus to selectively clean away mulch from conservation tilled fields without cultivation of the soil. When mounted on a tractor-drawn planter unit, the cleaning action of the present invention improves depth control and planting speed of the planter unit and facilitates seed germination while retaining the mulch between crop rows for erosion control and yield enhancement. In its planter embodiment, the row cleaner disclosed herein comprises a pair of pointedly toothed wheels journaled for rotation about intersecting axes mounted on the planter unit ahead of the furrow opener. The toothed wheels are mounted with their teeth intermeshed above the soil surface and rotate in planes symmetrically inclined downwardly, outwardly, and forwardly of the direction of travel of the planter unit.

Abstract: A disc ridger having an arrangement of disc gangs that substantially eliminates sidewise draft or clogging tendencies found in previous disc ridgers, also incorporating additional discs located for completing the tillage of the area swept by the disc ridger is described.

Abstract: A combined pile driver, pile drawer and drilling machine comprises a carriage (1), a turntable (1A) mounted on the carriage (1), support device (2), lifting device (4) and a mast system (5) comprising two mast units (3). The support device (2) comprises a tubular support bearing (9) which is hinged to the turntable (1A) at (6A) and the lifting device (4) comprises two hydraulic cylinder (6) which are hinged to the turntable (1A) at (6B) and to a bearing sleeve (9A) at (6C). The support device (2) further comprises a mast support (10) which surrounds the bearing (9) and extends through the sleeve (9A) and can be rotated about its own axis by means of an hydraulic cylinder (11) and a coupling (11A). Each mast unit (3) is mounted on the mast support (10) by brackets (14) and comprises a guide rail (13), a mast (12) which is slidable on the guide rail (13) by an hydraulic cylinder (15) and a cradle (30) which is movable on the mast (12) by an hydraulic feed cylinder (28).

Abstract: Demolition apparatus which is attached to a movable boom-like member of a machine. The demolition apparatus includes support structure which carries a power plunger and an actuator plunger. The plungers are mounted in adjacent relationship and are movable with respect to the support structure. A compression spring urges the power plunger in a direction from the support structure. The actuator plunger includes a latch device which engages a portion of the power plunger. In operation, the support structure is moved toward a surface to be demolished. The actuator member engages the surface and remains fixed as the support structure continues to move toward the surface. Therefore, as this occurs, there is relative movement between the support structure and the actuator plunger. A latch carried by the actuator plunger engages a part of the power plunger and retains the position of the power plunger with respect to the actuator plunger.

Abstract: An earth drilling bit incorporating a bit wear indicator. The bit wear indicator includes: a sensor to detect wear at a selected point on the bit; a device for altering the resistance of the bit to receiving drilling fluid from the drill string; and, a tensioned linkage extending between the wear sensor and the flow resistance altering means. On detecting a predetermined degree of wear, the wear sensor releases the tension in the tensioned linkage. This activates the flow resistance altering device, causing the flow rate and/or pumping pressure of the drilling fluid to change. This serves as a signal that the predetermined wear condition has been achieved. The bit wear indicator can be adapted to monitor many different types of bit wear, including bearing wear in roller-cone type bits and gauge wear in all types of bits.

Abstract: An earth drilling bit incorporating a tensioned linkage type bit wear indicator. A tensioned linkage extends through the bit between a wear sensor and a device for altering the resistance of the bit to receiving drilling fluid from the drill string. On detecting a predetermined degree of wear, the wear sensor releases the tension in the tensioned linkage. This activates the flow resistance altering device, causing the flow rate and/or pumping pressure of the drilling fluid to change. The tensioned linkage passes through two intersecting passageways in the bit. A guide element is inserted at the intersection of the two intersecting passageways. The guide element routes the tensioned linkage between the two passageways.

Abstract: A load sensing structure for weighing has a rectangular deck with four flexure members supporting the deck. Each flexure member has attachment portions secured to the deck and oppositely facing attachment portions secured to a fixed platform. U-shaped flexure intermediate portions have parallel legs or beams that are connected to one another by a rigid base of the U, and these legs are also cantilever connected to the attachment portions. Two strain gages on one such leg are so located that these gages must sense tension and compression to indicate weight in the bridge circuit. If both detect tension or both compression no weight indication will occur.

Abstract: A weighing device for attaching to the handle of a fish landing net or gaff has a tubular inner housing telescopingly received within a tubular outer housing, with a spring received between an annular collar centrally located on the inner housing and an internal shoulder on the outer housing. An "O" ring located on the side of the collar opposite the shoulder acts as a shock absorber and abuts a retaining ring that limits the travel of the collar in a direction away from the shoulder. A second shoulder spaced from the first shoulder acts to limit movement of the collar toward the first shoulder. A friction retaining adaptor attached at an end of the inner housing secures the net or gaff handle to the inner housing, and scale markings on the other end of the inner housing, which can be zeroed to eliminate the weight of the net or gaff, serve to indicate the weight of the fish.

Abstract: The invention relates to the construction equipment. A device comprises a body (1) internally accommodating a percussion member (2) with ports (5), an air distributing sleeve (6), an elastic element (7) and a threaded bushing (8). Grooves (9) are made on an external surface of the threaded bushing (8) at an angle to the axis of the device. When the device is moving soil gets in the grooves (9) of the threaded bushing (8) and develops a circumferential force fixing the threaded bushing (8) relative to the body (1).

Abstract: A vehicle having spherical-shaped wheels and which may be steered, and whose speed may be controlled, by varying the inclinations of the wheels about respective horizontal axes parallel to the longitudinal axis of the vehicle.

Abstract: A work vehicle having a frame defining a compartment for receiving vehicle components has a compartment closure arrangement which permits ease of access and adequate opening for servicing of the components. The compartment closure arrangement includes a cowl member which is pivotal in a first direction from a first position to a second position, a lid member which is pivotal in a second direction opposite the first direction from a first position to a second position, and a floor member which is pivotal between a first compartment covering position and a second compartment uncovering position. The compartment closure arrangement is particularly suited for use on a material handling vehicle.

Abstract: A rack-pinion type electrically powered steering apparatus is provided with an electronic control circuit adapted to control a motor driving current which is applied to a motor for power assistance, in response to a steering load characteristic and/or a vehicle speed characteristic. The steering apparatus is also provided with a rack end proximity sensor adapted to detect a position adjacent the both ends of the rack during a steering operation, and a device for providing the motor driving current with an attenuation characteristic in response to the detected signal from said rack end proximity sensor.

Abstract: A suction type traveling carriage which can be maintained in very intimate contact relationship with a wall, a ceiling or the like and can be moved in a stable manner by rotation of suction cups.

Abstract: An arrangement for controlling the propulsion or forward drive in the sense of preventing an undesired slippage of the wheels to be regulated in motor vehicles equipped with four-wheel drive, in which a driving velocity-reference signal necessitated for the regulation is derived from the minimum wheel velocity and the reference velocity is set during each regulating cycle anew into the range of the optimum friction.

Abstract: An installation for the propulsion regulation in motor vehicles acting on the output torque of the driving aggregate for preventing the undesired slippage of the driven vehicle wheels, whereby in case of determining the slippage tendency of a driven wheel, the magnitude determining the output torque is stored and subsequently reduced to its minimum value, is increased after the termination of the acceleration phase of this wheel to a value coordinated to the maximum value of the wheel acceleration which had occurred, is kept constant at this value, and in case of a determination of the ending of the slippage tendency, is increased by a further value coordinated to the maximum value of the wheel deceleration that had occurred whereby the delayed reaction of the drive aggregate is counteracted and a more rapid regulation with slight excess torque and fewer regulating cycles is attained.

Abstract: Front suspension device comprising a lateral arm, for supporting and steering a front wheel of a motorcycle, wherein the lateral arm is connected at its upper end to a suspension and/or shock absorbing block with telescopic cylinder of which the external movable rod is articulated at its end on an axis orthogonal to the median longitudinal plane of the motorcycle, the arm comprising in the lower part a ball and socket articulation support of which the center of pivoting is located substantially in the alignment of steering axis and cooperates with a connection arm rotationally mounted on an axle of the chassis perpendicular to the median plane of the motorcycle.