228results about How to "Increase flight distance" patented technology

A multilayer solid golf ball comprising a core and a cover of four layers is characterized in that a first layer of the cover enclosing the core has a Shore D hardness of up to 60, a second layer of the cover enclosing the first layer has a Shore D hardness of at least 45, a third layer of the cover enclosing the second layer has a Shore D hardness of up to 45, the second layer is made harder than the first layer, and a fourth layer of the cover enclosing the third layer is made harder than the third layer.

The solid golf ball of the invention is a one-piece golf ball or a multi-piece golf ball having a solid core enclosed directly in a cover or with an intermediate layer disposed therebetween. The one-piece golf ball or the solid core and/or intermediate layer of the multi-piece golf ball is formed of a rubber composition comprising a base rubber, an unsaturated carboxylic acid or a metal salt thereof, and a sulfur halide. Owing to the optimal degree of deformation and high resiliency of the elastic rubber portion therein, the solid golf ball has an excellent feel and an excellent flight performance.

A golf ball is provided that has improved aerodynamic efficiency, resulting in increased flight distance for golfers of all swing speeds, and more particularly for golfers possessing very high swing speeds, such as those who can launch the balls at an initial speed greater than 160 miles per hour and more particularly at initial ball speed of about 170 miles per hour or higher. The golf ball of the present invention combines lower dimple count with multiple dimple sizes to provide higher dimple coverage and improved aerodynamic characteristics.

Fine-grained (average grain size 1 nm to 1,000 nm) metallic coatings optionally containing solid particulates dispersed therein are disclosed. The fine-grained metallic materials are significantly harder and stronger than conventional coatings of the same chemical composition due to Hall-Petch strengthening and have low linear coefficients of thermal expansion (CTEs). The invention provides means for matching the CTE of the fine-grained metallic coating to the one of the substrate by adjusting the composition of the alloy and/or by varying the chemistry and volume fraction of particulates embedded in the coating. The fine-grained metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling. The low CTEs and the ability to match the CTEs of the fine-grained metallic coatings with the CTEs of the substrate minimize dimensional changes during thermal cycling and prevent premature failure.

An objective of the present invention is to provide a golf ball striking a balance between the flight distance on the driver shots and the approach performance on the approach shots and having the excellent shot feeling and durability. The present invention provides a golf ball comprising a core consisting of a center and a surrounding layer covering the center; at least one intermediate layer covering the core; and a cover covering the intermediate layer; wherein at least one piece or one layer of the intermediate layer is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic resin having a flexural modulus in a range from 700 MPa to 5,000 MPa and (B) an ionomer resin having a flexural modulus in a range from 150 MPa to 1,000 MPa in a content ratio ((A)/(B)) of (A) the highly elastic resin to (B) the ionomer resin (B) being (20 mass % to 80 mass %)/(80 mass % to 20 mass %) (the total is 100 mass %), and wherein a surface hardness (Hm) of the intermediate layer and a surface hardness (Hs) of the core satisfy the equation: Hm≧Hs, and the cover has a slab hardness (Hc) of 45 or less in Shore D hardness.

An object of the present invention is to provide a golf ball having an excellent properties like flight distance and low temperature durability. The present invention provides a golf ball comprising: a core consisting of a center and one or more intermediate layers covering the center; and a cover covering the core, wherein at least one piece or one layer of said intermediate layers is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic polyamide resin having a flexural modulus in a range from 700 MPa to 5,000 MPa; (B) a metal-neutralized product of ethylene-(meth)acrylic acid copolymer and (C) a resin having a polar functional group in a specific way.

An object of the present invention is to provide a golf ball having an improved controllability and shot feeling while maintaining a flight distance on driver shots. The present invention provides a golf ball having a core, an intermediate layer disposed around the core, and a cover disposed around the intermediate layer, wherein the core has a center and an envelope layer disposed around the center, and has a specific hardness distribution, and the intermediate layer is formed from an intermediate layer composition comprising, as a resin component, (A) a modified polyester elastomer and (B) a binary ionomer resin, and having a flexural modulus ranging from 150 MPa to 450 MPa, a maximum loss factor (tan δ) between −20° C. and 0° C. of 0.08 or less, a repulsive modulus of 55% or more, and a slab hardness ranging from 60 to 90 in JIS-hardness.

The present invention relates to a method of manufacturing an FRP tubular body. The manufacturing method includes the steps of winding a fiber reinforced resin member containing a fiber and a matrix resin around a mandrel, thereby obtaining an intermediate formed body, winding a wrapping tape around an outer peripheral surface of the intermediate formed body (6) with an application of a tension, curing the matrix resin in the intermediate formed body having the wrapping tape wound therearound, and pulling the mandrel out and removing the wrapping tape after the curing step, thereby obtaining a cured tubular body. It is preferable that a fabric tape should be used as the wrapping tape. It is preferable that a tensile stress to be applied to the fabric tape (8) should be set to be equal to or higher than 5 (Mpa) and is equal to or smaller than 150 (Mpa) at the tape winding step. In the manufacturing method, the matrix resin can be effectively extracted at a subsequent step to the winding step.

The invention relates to the technical field of an aerocraft, in particular to a screw propeller and the aerocraft. The screw propeller comprises an oar hoop and at least two blades which are connected with the oar hoop, wherein at a position (the proportion of the distance from the position to the center of the oar hoop to the radius of the screw propeller is P), the attack angle of the blades is beta, beta is the continuous function of the radius proportion P and satisfies the following conditions that when P is more than or equal to 0 and less than or equal to 25 percent, beta is more than or equal to 10 degrees and less than or equal to 12 degrees; when P is more than 25 and less than or equal to 90 percent, beta is more than or equal to 8.75 degrees and less than 12 degrees; when P is more than 90 percent and less than or equal to 100 percent, beta is more than or equal to 8 degrees and less than or equal to 9 degrees. Due to the fact that different attack angles are arranged at different positions of the blades of the screw propeller, the air resistance is reduced, the efficiency is improved, and the flying speed and the flying distance of the aerocraft are increased; due to the fact that the attack angle beta of the screw propeller is continuously changed, the stability of the screw propeller is improved, and the flying performance of the aerocraft is improved.

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 discloses a fixed wing aircraft provided with multiple rotor wings and capable of realizing vertical take-off and landing. The fixed wing aircraft comprises a fuselage, aircraft wings and a tail wing, as well as power rack units arranged on the aircraft wings and the tail wing, wherein the power rack units comprise front rotor wings, rear rotor wings and tail rotor wings. According to the invention, the switching between the helicopter mode take-off and landing and fixed wing flight mode can be realized, the safety performance of the take-off and landing of the aircraft is improved, and the take-off and landing mode of the traditional fixed wing aircraft is changed.

A golf club shaft formed by winding prepregs of an angular layer and those of a straight layer around a mandrel (10) having a steeply tapered part (10B) formed at a tip side thereof and a gently tapered part (10C) formed, at a butt side thereof, continuously with the steeply tapered part (10B). Prepregs (17, 18) of the angular layer are disposed at the tip side of the mandrel (10). Butt-side ends (17a, 18a) of the prepregs (17, 18) of the angular reinforcing layer at the tip side of the mandrel (10) are disposed at the butt side of the mandrel (10) with respect to a boundary position (P2) disposed at a boundary between the steeply tapered part (10B) and the gently tapered part (10C). A distance from the butt-side ends (17a, 18a) of the prepregs (17, 18) of the angular reinforcing layer at the tip side of the mandrel (10) to the boundary position (P2) is not less than 5% nor more than 30% of a whole length of the shaft.

A golf ball is provided that has improved aerodynamic efficiency, resulting in increased flight distance for golfers of all swing speeds, and more particularly for golfers possessing very high swing speeds, such as those who can launch the balls at an initial speed greater than 160 miles per hour and more particularly at initial ball speed of about 170 miles per hour or higher. The golf ball of the present invention combines lower dimple count with multiple dimple sizes to provide higher dimple coverage and improved aerodynamic characteristics.

The present invention provides a hollow golf ball having good shot feel at the time of hitting by making impact force small, while keeping excellent flight performance. Improved shot feel at the time of hitting by improving an impact absorption, while keeping excellent flight performance. The present invention relates to a hollow golf ball comprising:a hollow core composed of a hollow portion and one or more hollow core outer layers formed from a core composition comprising rubber component, resin component or the mixture thereof, anda cover formed on the hollow core, wherein, when a secondary natural frequency of the hollow golf ball is expressed as X and a deformation amount, when applying from an initial load of 10 kgf to a final load of 130 kgf on the hollow golf ball, is expressed as Y, a difference of X-Y is within the range of 0.1 to 1.5.

A multi-piece golf ball excellent in resilience and controllability includes a core composed of a center and an envelope layer covering the center and at least one cover covering the core, wherein the center is formed from a center composition containing (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of the binary copolymer, (a-3) a ternary copolymer composed of the binary copolymer components and an β,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of the ternary copolymer components and (B) a basic metal salt of a fatty acid, and wherein the envelope layer is formed from a rubber composition.

The invention relates to the technical field of unmanned aerial vehicles, and particularly discloses a propeller and an aircraft. The propeller comprises a propeller hoop and at least two propeller blades connected with the propeller hoop. The wing type of the propeller blades is ARA-D, and each propeller blade is composed of a root portion, a main body portion and a blade tip portion which are sequentially connected. The length L1 of the root portion accounts for 20% to 30% of the length L of the propeller blades, and the length L of the propeller blades is the length, in the first direction from the center of the propeller hoop to the farthest end of the blade tip portions, of the propeller blades; the installing inclined angle of the root portions ranges from 10 degrees to 15 degrees, and the blade widths of the root portions are gradually increased in the first direction; the length L2 of the main body portions accounts for 60% to 70% of the length of the paddle blades, and the blade widths of the main body portions are gradually decreased in the first direction; the minimum blade width of the main body portions accounts for 55% to 65% of the maximum blade width of the main body portions; and the length L3 of the blade tip portions is equal to L-L1-L2, and the blade widths of the blade tip portions are gradually decreased in the first direction. According to the propeller, the air resistance is reduced, efficiency is improved, and therefore the flying speed and the flying distance of the aircraft are increased.

The invention belongs to the technical field of fire prevention, suppression or fire extinguishment, and specifically relates to a three-phase compound foam liquid, and an application, a fire extinguishing device and a usage method thereof. The three-phase compound foam liquid comprises a mutually mixed gas-liquid phase foam liquid and a solid phase medium, wherein the solid phase medium is particles with air holes disposed therein. The fire extinguishing device comprises a gas-liquid phase foam liquid storage which is connected with a mixer of the foam liquid and the solid phase medium and a solid phase medium storage, wherein the gas-liquid phase foam liquid storage is also connected with a fire pump; the mixer of the foam liquid and the solid phase medium is connected with a gas-liquid-solid mixer through a high-powder pumping system; and the gas-liquid-solid mixer is connected with a nitrogen gas supply system. The fire extinguishing device can solve long-distance fire extinguishing problems for fighting full-area fire disasters of an oil tank, greatly increase the efficiency of fighting full-area fire disasters of the oil tank, can overcome the disadvantage of low fire extinguishing efficiency, can extinguish the long-distance fire effectively, has high fire extinguishing efficiency, and is safe in operations.