265 results about "Ball diameter" patented technology

A golf ball with aerodynamic coefficient magnitude and aerodynamic force angle, resulting in improved flight performance, such as increased carry and flight consistency regardless of ball orientation. In particular, the present invention is directed to a golf ball having increased flight distance as defined by a set of aerodynamic requirements, at particular spin ratios and Reynolds Numbers. The invention is also directed toward golf balls with dimple diameters of greater than 6.5 percent of the ball diameter and dimples with a profile defined by a catenary curve.

A resistive shunt valve (RSV) for draining cerebrospinal fluid. The RSV is comprised of a conduit housing and a valve member. The conduit housing is adapted for continuously conveying a flow of cerebrospinal fluid (CSF) with the valve member metering the flow of CSF therethrough. The valve member has a plurality of balls and at least one valve seat, with the number of balls being greater than the number of valve seats. The balls register within the valve seats in the direction of CSF flow. Small notches or irregularities are provided in the valve seats. Metering of CSF can be controlled by the housing diameter, ball diameter, number of balls, ball weight, irregularity of the valve seats, surface characteristics of the ball, and ball material.

A corrected ball diameter calculating method includes: preparing a reference gauge that has at least one reference peripheral surface of an outer peripheral surface and an inner peripheral surface; valuing of diameter values of the reference peripheral surface at a plurality of different height positions from a bottom surface of the reference gauge; calculating calibrated diameter values per each of the height positions; placing the reference gauge on the rotary table and causing the stylus tip to touch a plurality of measurement sites on the reference peripheral surface at each of the height positions to calculate measured diameter values that are diameter values of a circle passing through the neighborhood of center points of the stylus tip; and calculating the corrected ball diameters per each of the height positions from the calibrated diameter values and the measured diameter values that are calculated per each of the height positions.

A method of conditioning participants in games of billiards or the like to visualize the geometry underlying the pocketing of an object ball as the result of impact by a cue ball through the employment of a training device adapted to be positioned above the playing surface. The device includes a base member rotatable in a horizontal plane, said base member housing three laser light-emitting sources, the first of which is focused downwardly to illuminate a selected object ball, the second of which downwardly projects a line path from the illuminated object ball to the designated pocket, and the third of which is directed downwardly to emit a beam focused on the “aim spot,” said first and third laser light emitting sources being positioned perpendicular to the playing surface, parallel to each other, and spaced one object ball diameter apart, whereby when the propelled cue ball rolls over the “aim spot,” it impacts the proximate object ball causing it to travel along the illuminated line path to the designated target.

The invention provides a desert green planting structure and method which are particularly suitable for planting bare-rooted seedlings, shrubs and the dungarunga, the soil ball diameter of the shrubs and the dungarunga is lower than 50cm, and the shrubs and the dungarunga are suitable for being planted in the desert. The structure comprises a planting bag, a planting matrix, an irrigating device and a plant. The planting bag is filled with the planting matrix which completely buries the root of the plant. The irrigating device is arranged inside the planting bag and used for being connected with an irrigating water pipe, the tail end of the lower portion of the irrigating device faces the root of the plant, and the top end of the upper portion of the irrigating device is exposed out of the ground plane of the desert soil. According to the desert green planting structure and method, the plant can be planted in the desert conveniently and rapidly, the planting survival rate of plants in the desert area is improved, meanwhile, the irrigating efficiency can be improved, and irrigation water is saved.

Internal dimensions for fixed-type constant velocity universal joints are defined to optimize the geometry of the components of the joints and to readily achieve a larger operating angle of the joints. In the joint, the track grooves of an outer ring and an inner ring are tapered by an angle not exceeding 12°. The ratio (f/PCR) of the cage offset amount f to PCR is greater than 0 and smaller than or equal to 0.12. The ratio (Do/d) of the cage outer diameter (Do) to the ball diameter (d), the ratio (t/d) of the cage wall thickness (t) to the ball diameter (d), and the ratio (w/d) of the cage width (w) to the ball diameter (d) are such that 3.9≦Do/d≦4.1, 0.31≦t/d≦0.34, and 1.8≦w/d≦2.0, respectively. The end of the spherical outer surface of the cage adjacent to the open end is axially extended, and the end of the spherical inner surface of the cage adjacent to the open end is tapered so that the tapered surface has an increasing diameter toward the end of the spherical outer surface adjacent to the open end. Part of the spherical outer surface of the cage is cut on the open end side of pockets, and the outer diameter of the cage across the two opposing planer cut faces is smaller than the spigot diameter of the outer ring.

A bearing apparatus for supporting a pinion shaft comprises a pair of rolling bearings which rotatably support a pinion shaft to a case and are arranged side by side in a shaft direction between a pinion gear arranged at one end of the pinion shaft, and a companion flange attached outside the other end thereof. The rolling bearing on a companion flange side comprises an angular ball bearing, and a radius of curvature Ri of an inner ring raceway, a radius of curvature Ro of an outer ring raceway, and a ball diameter Bd of the rolling bearing may satisfy a relationship given by equations of Ri<Ro, 0.502×Bd≦Ri≦0.512×Bd, and 0.510×Bd≦Ro≦0.520×Bd.

To provide a wheel bearing device which is made light and compact while increasing the rigidity of a bearing. In the wheel bearing device, a pitch circle diameter PCDo of a ball group 3 located close to a wheel mounting flange 7, out of double row ball groups 3, 4, is set to be larger than a pitch circle diameter PCDi of the ball group 4 located far from the wheel mounting flange 7. A ball diameter do of the ball group 3 located close to the wheel mounting flange 7 is set to be larger than a ball diameter di of the ball group 4 located far from the wheel mounting flange 7, the ball number of the former is set to be more than that of the latter. A mortary recessed portion 14 is formed in the end on the outer side of a hub ring 5. The depth of the mortary recessed portion 14 reaches the vicinity of at least shaft portion 8, and the shell of the hub ring 5 is shaped with its thickness approximately uniform. This solves conflicting problems on the device which is lighter/compacter as well as highly rigid.

Internal dimensions for fixed-type constant velocity universal joints are defined to optimize the geometry of the components of the joints and to readily achieve a larger operating angle of the joints. In the joint, the track grooves of an outer ring and an inner ring are tapered by an angle not exceeding 12 DEG . The ratio (f/PCR) of the cage offset amount f to PCR is greater than 0 and smaller than or equal to 0.12. The ratio (Do/d) of the cage outer diameter (Do) to the ball diameter (d), the ratio (t/d) of the cage wall thickness (t) to the ball diameter (d), and the ratio (w/d) of the cage width (w) to the ball diameter (d) are such that 3.9<=Do/d<=4.1, 0.31<=t/d<=0.34, and 1.8<=w/d<=2.0, respectively. The end of the spherical outer surface of the cage adjacent to the open end is axially extended, and the end of the spherical inner surface of the cage adjacent to the open end is tapered so that the tapered surface has an increasing diameter toward the end of the spherical outer surface adjacent to the open end. Part of the spherical outer surface of the cage is cut on the open end side of pockets, and the outer diameter of the cage across the two opposing planer cut faces is smaller than the spigot diameter of the outer ring.

The invention discloses a two-layer variable ball diameter packed bed heat storage device and provides a preparation method of a heat storage ball. A large-diameter heat storage ball is arranged on the upper layer of the packed bed heat storage device, and a small-diameter heat storage ball is arranged on the lower layer of the packed bed heat storage device. The packed bed heat storage structurecomprehensively considers two important evaluation indexes of the heat storage device, namely heat storage rate and heat storage density, the maximum heat storage rate of the packed bed heat storage device serves as a design principle, and an optimal combination of diameters of the heat storage balls in the packed bed is obtained by virtue of an optimization design, so that the heat storage devicehas optimal heat storage performance. According to the preparation method of the heat storage ball provided by the invention, the heat storage ball with advantages of high heat storage density, excellent heat-conducting property, high mechanical strength, excellent sealing property and simple preparation process can be prepared.

The invention discloses nanometer blue titanium dioxide colloid and a preparation method and application thereof. The colloid is a nanometer blue titanium dioxide ball, wherein the ball diameter is 20-40nm and the ball is composed of tetravalent titanium ions and trivalent titanium ions according to an atomic percent ratio of 51%: 49%. The preparation method comprises the following steps: firstly, mixing white rutile phase titanium dioxide powder with deionized water according to a weight ratio of (1-10): 1, uniformly stirring to obtain emulsion, and then, irradiating the emulsion by using laser with a wavelength of ultraviolet, power of 0.5-4.5W, frequency of 8-12Hz and a pulse width of 4-8ns for 10-30min to prepare a target product. An aqueous solution of the target product can be used as a detection reagent to detect glucose through a colorimetric method, or a mixed solution of the aqueous solution of the target product, glucose oxidase and a phosphate buffer solution is used as the detection reagent to detect glucose through the colorimetric method; and when used for detection, the target product has the advantages of simple process, good quickness and sensitivity, low detection cost, short time, environmental protection and the detection accuracy is hardly influenced by external factors.

The invention discloses a preparation method of a contact-type optical fiber micro probe based on an optical fiber tapering technology. Through the optical fiber tapering technology, the diameter of a single mode fiber is attenuated to be in a range of less than 40 micrometers. Then, the single mode fiber after being attenuated is accurately put into a V-type groove in an optical fiber welding machine, and at the same time, the tapered portion of the optical fiber is placed on a discharging region of the optical fiber welding machine. The tapered portion of the optical fiber is heated and fired through the optical fiber welding machine, and the optical fiber is evenly rotated until the end of a tapering optical fiber is melted to be a high-quality micro probe ball. In the process of firing of the optical fiber, process control parameters of the optical fiber welding machine are reasonably arranged based on a taguchi method, the optical fiber is rotated to overcome the impact caused by gravity, and accordingly the micro probe ball which is small in ball diameter, good in sphericity and small in eccentricity is obtained on the end portion of the tapering optical fiber. The micro probe ball and the tapering optical fiber form the contact-type optical fiber probe.

An engine crankshaft of automobile is prepared from cast iron material. It features that material intensifying process is applied on said cast iron material i.e. utilizing isothermal hardening heat treatment to process normal graphite cast iron to be austenit-bainite graphite cast iron and making cast-state blank bailing grade be 1-2 grade as well as making graphite ball diameter be above 6grade.

The invention relates to an ordered ball type big mesoporous Alpha-Fe2O3 material, belonging to the technical filed of material preparation. The ball type big mesoporous Alpha-Fe2O3 material with an aperture diameter of 37 plus or minus 3nm and an aperture wall of 12 plus or minus 2nm, which orderly extends along the three-dimensional direction, is obtained by taking the polymethacrylic methyl rosmarinate milk-globule the ball diameter of which is 71 plus or minus 5nm and the colloidal crystals which are closely accumulated and distributed along the three-dimensional direction as templates, and through dipping the templates by the ethanol-water mixture of FeC2O4.2H2O, and then removing the PMMA templates through heating, solidifying and roasting. The structure and the magnetic performance of the big mesoporous are determined into a novel ordered ball type big mesoporous Alpha-Fe2O3 material through SEM, TEM, XRD and N2 adsorption test and squid. The material of the invention has the advantages of crystal aperture wall, particular ball type big mesoporous and weak ferromagnetism. The material can be used for preparing for catalyst and sensor.

The present invention provides a light and compact slide-type constant velocity universal joint that can have a maximum operating angle of 30 DEG or more through optimization of a ball contact angle relative to ball grooves, a ball contact ratio, and a cage offset amount. The present invention is the slide-type constant velocity universal joint including an outer ring 12 in which six linear ball grooves 12b are formed on a cylindrical inner circumferential surface 12a in an axial direction, an inner ring 13 on which six linear ball grooves 13b are formed on a spherical outer circumferential surface 13a in the axial direction and a connecting hole for connecting a shaft is formed in a center section, six torque transmission balls 14 disposed on ball tracks formed by a pair composed of the a ball groove 12b on the outer ring 12 and a ball groove 13b on the inner ring 13, and a cage 15 having pockets 15c for storing the torque transmission balls 14, a convex spherical outer circumferential surface 15a that is in contact with and guided by the inner circumferential surface 12a of the outer ring 12, and a concave spherical inner circumferential surface 15b that is in contact with and guided by the outer circumferential surface 13a of the inner ring 13 and in which a spherical surface center O C0 of the outer circumferential surface 15a and a spherical surface center O CI of the inner circumferential surface 15b are offset to opposite sides of a pocket center O in the axial direction. In the slide-type constant velocity universal joint, a ratio of ball diameter to outer ring outer diameter is 0.21 to 0.25, a ratio of ball pitch diameter to outer ring outer diameter is 0.64 to 0.68, a contact angle of the ball groove is 30 DEG to 35 DEG , a contact ratio of the ball groove is 1.02 to 1.08, and a ratio of cage offset amount to ball pitch diameter is 0.07 to 0.09.

The invention relates to a method for preparing titanium alloy TA15 metal balls by employing a plasma auxiliary rotating electrode centrifugal process. In a sealed container protected by inert gas, a glow discharge plasma arc is generated between a plasma auxiliary electrode and a consuming electrode made of a rotating cylinder titanium alloy TA15. The high temperature caused by the plasma arc forms droplets on a section of the titanium alloy TA15 electrode, close to the plasma arc, and the droplets are thrown out by centrifugal force. The droplets of the titanium alloy TA15 is air cooled and solidified into a ball shape in the inert gas environment of the sealed container, thus, the titanium alloy TA15 metal balls are obtained. The method can obtain titanium alloy TA15 metal balls with the average sphere diameter between 0.1mm and 1.5 mm and good monodispersity by changing process parameters. The prepared powder metal balls have the advantages of good sphericity, lower proportion of abnormal granule and controllable ball diameter and can be used in the field of laser solid forming to prepare special components of aviation spacecraft.