111 results about "Directional stability" patented technology

A golf club head has a face plate of high strength and high resilience and which provides excellent directional stability of the ball trajectory. The golf club head comprises a thick-walled portion 3 at the center of the face plate 2, and at least four narrow ribs 4a and 4b. Each of the ribs is formed with a thickness not substantially exceeding the thickness of the thick-walled portion, and extends radially from the thick-walled portion toward the perimeter of the face plate. Thin-walled portions 5 are formed between the thick-walled portion and the narrow ribs.

A single-tilt-rotor VTOL airplanes have a tiltable rotor attached to an elongated power pod containing the collective and cyclical pitch mechanism, and transmission. The power pod is pivotably attached to a base that is slidably mounted on a pair of slotted guide beams attached on top of the roof of the fuselage. The guide beams run longitudinally from the front of the aircraft to past the center of gravity (CG) of the aircraft in order to transport the power pod from the front section to the center section when converting from the horizontal cruising mode to the VTOL mode. In the horizontal cruising mode, the power pod perched horizontally on top of the fuselage front section with sufficient clearance for the rotor to rotate in front of the aircraft. Upon transitioning to the VTOL mode, a telescopic actuator is used to pivot the power pod vertically while a cable-winch system is used to move the entire power pod and base assembly rearwardly to stop at the center of gravity of the aircraft, and vice versa, thus allowing the power pod to travel significantly rearward and forward as required for proper balancing of vertical lift as the power pod pivots 90 degrees during transition from VTOL mode to the cruising mode. A single piston engine, or a single or pair of turbofan engines, mounted slightly to the rear of the CG, have drive shafts that can be clutched and mated onto respective receiving shaft from the transmission within the power pod in order to power the tiltable rotor. The engine is also attached to a propeller for horizontal propulsion, or if turbofan engines are used, jet thrust is generated for horizontal cruise. A small anti-torque rotor or ducted fan toward the tail of the aircraft is mechanically coupled to the engine via a drive shaft to provide the necessary side-way thrust to overcome the main rotor's torque. In the horizontal cruising mode, the tiltable rotor is allowed to windmill slowly at a minimum rotational speed necessary to maintain the integrity of the rotor blades. The same propulsion principle can be applied to VTOL airplanes having more than one tiltable rotor, thereby can potentially increase the speed, range and reliability of current twin-wing-mounted-tilt-rotor aircraft. A pair of high-aspect-ratio wings on both sides of the fuselage provide highly efficient lift during cruising flight with very little induced drag. Conventional horizontal and vertical tail planes are used for directional stability in the cruising mode.

This invention proposes a new, improved method and apparatus for applying web segments to a traveling web. Ears, or wings, are placed on a running web of disposable diapers. Because these webs are often asymmetrical or otherwise incompatible with the principle of slipping over the surface of a moving vacuum roll, the webs may float from side to side or otherwise be drawn out of square by asymmetrical forces. A vacuum groove is provided on a vacuum roll to counter these effects. Alternatively, a ridge with vacuum about the ridge is provided, also to pull a machine direction line of material into the groove or over the ridge, thereby giving the web some degree of cross-directional stability.

An aerial platform comprising a kite providing a level of directional stability when elevated by the wind, and an inflated balloon attached above the kite with a cord. The payload is attached to the kite. The physical separation of the balloon from the kite isolates the payload from shocks generated by the balloon. Additional isolation is provided by use of an elastic attachment cord. Electric power is supplied to the aerial platform by means of an optical fiber receiving optical power from a ground-based source, and conversion of the optical power to electrical power on board the platform. In order to provide a strong tether line, the optical fiber is plaited with a jacket braided from high tensile strength fibers. An aerial laser transmitter is described using a ground based laser source transmitting laser power through an optical fiber to an aerial platform for transmission from the platform.

The invention mainly aims at precision testing of characteristic parameters such as facial form and surface roughness of a large-scale sphere and an aspheric surface and particularly relates to an outline scanning measuring method and a device of the large-scale sphere and the aspheric surface. The large-scale sphere and the aspheric surface can separate an axial end jump error and a rectilinear motion guide rail error in an X direction in real-time, achieve real-time self-detaching of the axial end jump error of a drive shaft system and an aspheric surface outline measurement value, adopt a reference beam with high direction stability to monitor and compensate a guide rail motion error in real-time and be capable of conduct autonomous detaching and real-time compensation on the high-precision large-scale sphere and the aspheric surface such as the axial end jump error of the drive shaft system and the rectilinear motion guide rail error in the X direction. The outline scanning measuring method and the device of the large-scale sphere and the aspheric surface provides a new method and a new technology for high-accuracy measurement of parameters such as the facial forms of the large-scale sphere or aspheric surface, surface roughness, radius of curvature and the like.

This invention relates to front fork, telescoping type suspension systems for bicycles. The main focus of the invention is the brake bridge assembly, the fork crown assembly and the joinder of these assemblies to form the fork suspension. The brake bridge assembly serves two main functions: 1) it provides a stiff structural connection between the right and left telescoping struts, to reduce wheel wobble during high speed wheel impacts, and 2) it provides a structural support for the brake cable stop. The invention provides for increased stiffness and lower stresses in the brake bridge, which translates into improved directional stability for the front wheel, less displacement for the brake cable stop .(when the brake loads are applied) and improved fatigue life for the assembly. It also provides for a simpler and less expensive means for mounting the brake bridge to the fork assembly. The invention also encompasses the fork crown producing a lightweight structure with high torsional and bending rigidity. The connections of the stanchions to the crown are achieved through a variety of methods including, (a) interference fit and bonding, (b) collet assembly and (c) "pinch-bolt" connections.

The invention is directed to an arrangement for providing a reproducible target flow for the energy beam-induced generation of short-wavelength radiation. It is the object of the invention to find a novel possibility for providing a reproducibly supplied target flow for the generation of a plasma that emits short-wavelength radiation which ensures a high directional stability of the target flow over a large number of individual plasma generation process for any target materials under given process conditions. According to the invention, this object is met in that a nozzle protection device is provided in the interaction chamber between the target nozzle and the interaction point for the generation of the plasma, and the nozzle protection device contains a gas pressure chamber which has an aperture along the target path for unobstructed passage of the target flow and which is filled with a buffer gas that is maintained at a pressure of some 10 mbar.

This invention proposes a new, improved method and apparatus for applying web segments to a traveling web. Ears, or wings, are placed on a running web of disposable diapers. Because these webs are often asymmetrical or otherwise incompatible with the principle of slipping over the surface of a moving vacuum roll, the webs may float from side to side or otherwise be drawn out of square by asymmetrical forces. A vacuum groove is provided on a vacuum roll to counter these effects. Alternatively, a ridge with vacuum about the ridge is provided, also to pull a machine direction line of material into the groove or over the ridge, thereby giving the web some degree of cross-directional stability.

A high maneuverability towcraft has a hull, a primary water-engaging device, and a towline attachment above a waterline of the hull. A towline line-of-tension extends through an effective centerline of the primary water-engaging device. The towcraft also has a castering device for providing directional stability to the towcraft which allows the towcraft to follow the lead of the primary water-engaging means. The stability of the towcraft is not negatively impacted either by any lateral force of the towline or by an instantaneous position of the towline with respect to a front of the towcraft.

A skateboard truck insert is positioned between an axle and a base plate of a skateboard truck to reduce turning radius but still maintain directional stability. The insert is comprised of an intermediary member with a pin on top for mating with a pin receiving hole in the base plate. The intermediary member includes a mounting portion with a through hole. First and second bushings are positioned on either side of the mounting portion. First and second washers are positioned against respective outer ends of the bushings. A bolt is positioned through the washers, bushings, and the hole for mating with the bolt receiving hole on the base plate of the truck. A pin receiving hole and a bolt receiving hole are positioned on a bottom of the intermediary member for respectively receiving a pin and a bolt extending from the axle of the truck.

An aircraft (10), in particular a trainer aircraft with improved aerodynamic performance, having a configuration able to keep a directional stability and a very good aerodynamic behaviour even at very high angles of attack, where, traditional configurations prove themselves inefficient. In particular, this configuration foresees a forebody (52) with variable section, optimised for high angle of attack flights, a LEX vortex control device (72) at least one diverterless air intake (46), and a wing profile (18, 20) optimised in order to reduce the buffet effects typical of low aspect ratio wings with thin profile and variable camber. The aircraft (10) presents, finally, staggered tails (44 and 38), to optimise the aerodynamic performance.

An aerial platform comprising a kite providing a level of directional stability when elevated by the wind, and an inflated balloon attached above the kite with a cord. The payload is attached to the kite. The physical separation of the balloon from the kite isolates the payload from shocks generated by the balloon. Additional isolation is provided by use of an elastic attachment cord. Electric power is supplied to the aerial platform by means of an optical fiber receiving optical power from a ground-based source, and conversion of the optical power to electrical power on board the platform. In order to provide a strong tether line, the optical fiber is plaited with a jacket braided from high tensile strength fibers. An aerial laser transmitter is described using a ground based laser source transmitting laser power through an optical fiber to an aerial platform for transmission from the platform.

An improved walk behind polisher and grinder is disclosed. The improved walk behind polisher and grinder provides a surface polishing machine capable of operation with increased directional stability and reduced dust accumulation to the essential internal components of the machine. The improved walk behind polisher and grinder includes a drive motor mounted on a frame. The drive motor rotates a central shaft, and the central shaft supports a belt pulley and a rotary housing. The belt pulley mechanically communicates with at least one pinion shaft through an endless drive. Each pinion shaft is mechanically engaged by an internal gear such that rotation of the central shaft causes the pinion shaft to rotate about their own axes in a given direction and to revolve around the central shaft in the opposite direction.

An improved bi-center with improved directional stability and wear resistance is disclosed, said bit optimally utilizing a plurality of shaped PDC cutting elements selectively situated about the cutting surfaces of the pilot and the reamer to produce a minimal force imbalance, where further said pilot bit and the reamer are force balanced to further reduce imbalance in the operation of the tool.

The invention discloses a four-wheel drive vehicle-based moment of force distribution control system. The four-wheel drive vehicle-based moment of force distribution control system comprises an ECU (Electronic Control Unit), wheel rotating speed sensors, a steering wheel rotating angle sensor, a vehicle body speed sensor, a hydraulic control brake, a yaw velocity sensor and an inter-axis electric control limited slip differential, wherein all of the wheel rotating speed sensors, the vehicle body speed sensor, the yaw velocity sensor and the steering wheel rotating angle sensor are connected with the input end of the ECU; both the inter-axis electric control limited slip differential and the hydraulic control brake are connected with the output end of the ECU. According to the four-wheel drive vehicle-based moment of force distribution control system, a vehicle shows high dynamic performance and operating stability after moment of force distribution comprehensive control and inter-axis moment of force distribution control are applied to the vehicle, so that the four-wheel drive vehicle-based moment of force distribution control system has high practicability in the application of improving the traction trafficability, the directional stability or the steering maneuverability of the vehicle.

A battery separator is a microporous membrane. The membrane has a major volume of a thermoplastic polymer and a minor volume of an inert particulate filler. The filler is dispersed throughout the polymer. The membrane exhibits a maximum Z-direction compression of 95% of the original membrane thickness. Alternatively, the battery separator is a microporous membrane having a TMA compression curve with a first substantially horizontal slope between ambient temperature and 125° C., a second substantially horizontal slope at greater than 225° C. The curve of the first slope has a lower % compression than the curve of the second slope. The curve of the second slope is not less than 5% compression. The TMA compression curve is graphed so that the Y-axis represents % compression from original thickness and the X-axis represents temperature.

The invention discloses an underwater recovery device for an autonomous underwater vehicle (AUV), and relates to the technical field of underwater engineering. The underwater recovery device is used for underwater recovery of the AUV through a deep-sea carrier and comprises an AUV butting mechanism, a recovery frame, a hydraulic cylinder and a rotating mechanism; the AUV butting mechanism comprises a guiding opening and a storage depot which are connected; a quadrilateral connecting rod structure is formed by the recovery frame and the storage depot; the hydraulic cylinder is arranged on the recovery frame to drive the movement of the AUV butting mechanism in the vertical direction; and the rotating mechanism is arranged between the recovery frame and the deep-sea carrier and drives the recovery device to rotate. The underwater recovery device utilizes the adjustability in the vertical direction and direction stability during transferring of a parallelogram frame and utilizes the direction adjustability of the rotating mechanism, thus it is ensured that the AUV can be in accurate butt joint with and smoothly recovered into the deep-sea carrier, and the underwater recovery device has the advantages that direction adjustability is good during butting and recovering, and the transferring mode is easy and convenient.

The invention discloses a vehicle anti-skid brake system (ABS) control method suitable for various road conditions, and relates to the technical field of automobile electronic control. In the method, the ABS control process is divided into a primary control cycle and a conventional control cycle; during the primary control cycle, road surfaces are identified through wheel speed difference; and during the conventional control cycle, the road surfaces are identified through a wheel speed peak slope, a wheel speed reduced value in a depressurization section, and pressurization frequency. For a bisectional road, two front wheels are under corrected low selector control and two back wheels are independently controlled by a control strategy for a corresponding road surface according to the identified road surface; and for a single high adhesion or low adhesion road surface, the front wheels are under pressurization synchronous control, and the back wheels are controlled by a method for a single road surface. The control strategy for the corresponding road surface is adopted according to vehicle adhesion road surfaces. The method can solve the problems of braking direction instability and brake distance when a vehicle brakes on various road surfaces.

A golf ball having a predetermined radius, and a spherical outer surface with a multiplicity of dimples formed therein. A protrusion is formed in each of the dimples which are located in hit portions having a diameter of 5–15 mm, or alternatively, is formed in each of all the dimples. The protrusion has a distal end whose radial distance from the center of the golf ball is equal to the predetermined radius of the golf ball. The protrusion has a partition wall which divides a space in each dimple into a plurality of segmental spaces. The protrusion may have two partition walls which are perpendicular to each other and intersect at right angles for dividing a space in each of the dimples into four segmental spaces.

The invention provides an automobile wheel drive anti-slip control method. Based on the slippage rates of various driving wheels of a vehicle, different working ways are selected, when the slippage rates of the wheels on the two sides are different, the wheels run on a bisect adhesion road, and when the slippage rates of the wheels on the two sides are equal, the wheels run on a uniform low-adhesion road. According to one-sided slip and two-sided slip of a vehicle body, different control ways are adopted. The slippage rate is reduced by braking before torsion reduction or simultaneous torsionreduction, the vehicle body is stabilized, excess power output of an engine is reduced, the driving direction stability of a rear-drive vehicle in the acceleration process and the handling stability of a front-drive vehicle in the acceleration process are improved, the situation that drastic fluctuation of acceleration is caused by frequent regulation of an actuator cannot be caused, the gradeability of the vehicles is improved, and tyre wear, power loss and fuel consumption are reduced. An automobile anti-slip system using the method can improve the starting acceleration performance of the vehicles on the bisect adhesion road and the low-adhesion road, and further can ensure the driving comfort and the speed continuity in the starting acceleration process.

A vehicle behavior control device (S) determines, by using a vehicle velocity (V), a transmission function (K(s)) which is determined based on a specification of the vehicle, receives as an input a wheel turning speed (ω) obtained by differentiating a wheel turning angle (δ) of left and right front wheels (FW1, FW2) with respect to time, and outputs a target yaw moment (My). The device (S) also calculates, by using the determined target yaw moment (My), a left-wheel-side forward / backward force (FxCL) imparted to a left wheel side (left front wheel FW1 and left rear wheel RW1) of a vehicle (10) and a right-wheel-side forward / backward force (FxCR) imparted to a right wheel side (right front wheel FW2 and right rear wheel RW2) of the vehicle (10). Then, the device (S) performs control to drive brake units (14-17) and in-wheel motors (IWMfl, IWMfr, IWMrl, IWMrr) depending on a turning direction of the vehicle (10), with the left-wheel-side forward / backward force (FxCL) serving as a braking force (or driving force) and the right-wheel-side forward / backward force (FxCR) serving as a driving force (or braking force). It is thus possible to ensure directional stability and responsiveness when the vehicle turns, taking into account a frequency response characteristic of a motion state amount generated on the vehicle (10).

The invention relates to the field of complex machinery product assembling programming and discloses a complex machinery product assembling sequence programming method based on a firework algorithm. The method comprises the steps of: carrying out product modeling based on assemblies so as to establish a basis for assembling sequence programming based on the firework algorithm; aimed at characteristics of the assembling sequence programming problem and according to basic principles of the firework algorithm, re-defining relative operation of the firework algorithm, and constructing the firework algorithm facing the assembling sequence programming; using assembling direction change times, assembling direction stability and assembling tool transformation times as three evaluation indexes, and utilizing an optimization searching mechanism of the firework algorithm to carry out optimization on an assembling sequence; and realizing the complex machinery product assembling sequence programming method based on the firework algorithm by means of MATLAB programming, and obtaining an optimized assembling sequence. According to the invention, the manufacturing cost of a complex machinery product is lowered, and the exploitation period of the product is shortened.

An object of the invention is to provide a golf ball excellent in the durability at the normal and low temperatures, flight distance, direction stability and shot feeling on the shots. The present invention provides a golf ball comprising: a core consisting of a center having a diameter of 35 mm or less and a surrounding layer covering the center; at least one intermediate layer covering the core, said intermediate layer having a thickness ranging from 0.5 mm to 1.2 mm and a density of 1.10 g / cm3 or more; and a cover covering the intermediate layer and having a thickness ranging from 0.3 mm to 1.0 mm, wherein the cover is formed of a cover composition that has a slab hardness ranging from 65 to 75 in Shore D hardness and contains as a resin component; (A) a polyamide resin composition having a flexural modulus in a range from 700 MPa to 4,000 MPa and a melt flow rate (240° C., 2.16 kg) of 5.0 g / 10 min or more; (B) at least one member selected from the group consisting of an ethylene-(meth)acrylic acid binary copolymer, a metal-neutralized product of the binary copolymer, an ethylene-(meth)acrylic acid-(meth)acrylic acid ester ternary copolymer, and a metal-neutralized product of the ternary copolymer; and (C) a fluidity improving agent.

A control system that employs closed-loop control for providing active vehicle rear-wheel steering, where the control system receives longitudinal wheel slip inputs to improve the vehicle directional stability. The longitudinal wheel slip inputs can be from one or more of wheel speed, traction control on and automatic braking system on. The control system includes an open-loop controller for generating an open-loop steering control signal, a yaw rate feedback controller for generating a yaw rate feedback signal, and a side-slip rate controller for generating a side-slip rate feedback signal. The open-loop steering control signal, the yaw rate feedback signal and the side-slip rate feedback signal are combined to generate the steering control signal to steer the vehicle rear wheels.

A reclinable office chair includes a reclination adjustment unit disposed at the bottom of the office chair. The reclination adjustment unit balances itself on the floor properly, resiliently and steadily. The office chair tilted in a forward-backward direction and / or a left-right direction displays directional stability relative to the floor in a manner not to lose the directional stability even when a sitter tilts in any direction, thereby allowing the office chair to provide a comfortable seat for the sitter to sit on, regardless of whether the office chair is upright or tilted in any direction.

The invention is directed to an arrangement for providing a reproducible target flow for the energy beam-induced generation of short-wavelength radiation. It is the object of the invention to find a novel possibility for providing a reproducibly supplied target flow for the generation of a plasma that emits short-wavelength radiation which ensures a high directional stability of the target flow over a large number of individual plasma generation process for any target materials under given process conditions. According to the invention, this object is met in that a nozzle protection device is provided in the interaction chamber between the target nozzle and the interaction point for the generation of the plasma, and the nozzle protection device contains a gas pressure chamber which has an aperture along the target path for unobstructed passage of the target flow and which is filled with a buffer gas that is maintained at a pressure of some 10 mbar.

The invention provides a double-loop electric liquid hybrid brake system and a brake control method thereof. The system comprises a manpower brake loop and a line control dynamic loop, wherein the manpower brake loop comprises a brake pedal (1), a manpower cylinder (4) and a first brake group which is in hydraulic connection with the manpower cylinder (4); the line control brake loop comprises a brake pedal stroke sensor (10), a brake controller (7), an electronic cylinder (5) and a second brake group which is hydraulic connection with the electronic cylinder (5). The invention discloses the manpower brake loop which is manipulated by a driver and the line control dynamic loop which is controlled by an electric control system, ideal front and rear axle brake power allocation is achieved, and the reliability of the brake system can be improved. The system has the advantages of being rapid in brake response, good in brake pedal sensation and brake direction stability, high in ground adhesion utilization rate, simple in structure, low in cost and high in reliability.