Abstract:
A golf shaft made of fiber reinforced plastic and including a tip portion attached to a head, a butt portion attached to a grip, and a middle portion located between the tip portion and the butt portion. The golf shaft has a generally tapered shape in which the outer diameter generally increases gradually from the tip portion to the butt portion. The golf shaft includes a first portion in which linear density is generally uniform. A second portion is defined by the part of the shaft excluding the first portion. The first portion occupies 30% or more of the entire shaft length, and the linear density of the first portion is greater than that of the linear density.
Abstract:
There is provided a golf club shaft in which the shaft is properly flexed at the time of swing and an excessive deformation of the shaft is restricted at the time of impact, a high repelling force is generated, and thereby an initial speed of the ball and the carry of the ball are further improved and which is quite suitable for using a club head having a low center of gravity or a large sized club head. This golf club shaft is filled with the resilient material having a feature in which a rapid application of force against the entire inner part of the hollow shaft or its extremity end causes a high repelling force to be acted on to cause it to be hardly deformed and in turn a gradual application of force causes itself to be easily deformed.
Abstract:
The present invention relates to a golf club shaft having improved torsion characteristics comprising a base shaft having an internal surface and an external surface, and at least one wave shaped reinforced part on at least one of said surfaces, said wave shaped reinforced part comprising a plurality of reinforcement pieces. The wave shaped reinforced part is located on at least one of the upper portion, midpoint or lower portion. The golf club shafts of the present invention can be made by applying a base section of a prepreg sheet or assembly having a plurality of finger like elements to a portion of a base shaft, wrapping the finger like elements around the base shaft to provide a wave shaped reinforced part having a plurality of reinforcement pieces, and curing the shaft having the wave shaped reinforced part thereon to produce a golf club shaft having a wave shaped reinforced part. Golf clubs made with the shafts of the present invention impart greater flying distance and/or directional accuracy to golf balls struck by the golf clubs. The wave shaped reinforced part provides a means of moving the kick point of the shaft to achieve a desired effect on flying distance and/or accuracy. The present invention provides a convenient means of adjusting the characteristics of a golf club shaft according to the skill level of the intended user.
Abstract:
In a golf club shaft hollow pipe-shaped and composed of a laminate of prepregs, a vibration absorption member (10) made of an elastic material whose tannull at 10null C. is not less than 0.7 is installed at least one portion inside the hollow pipe-shaped golf club shaft. The vibration absorption member (10) has a body having a hollow portion, a central part connected to the body through a plurality of connection parts and disposed inside the hollow portion, a plurality of projected parts formed on a peripheral surface of the body and contacting an inner peripheral surface of the pipe-shaped golf club shaft. It is preferable that the weight of the vibration absorption member (10) is not less than 1 g nor more than 10 g, that the number of the connection parts is not less than two nor more than 10, and that the weight of the central part is not less than 10 wt % nor more than 60 wt % of a whole weight of the vibration absorption member.
Abstract:
A tubular structural member that provides directional resistance. The tubular structural member has a flexural resistance that is greater in one direction than in another. The tubular structural member can be employed in variety of devices or structures so as to effect the overall stiffness of the device.
Abstract:
A golf club shaft having a fiber reinforced thermosetting resinous material (10) and a fiber reinforced thermoplastic resinous material (20), wherein the fiber reinforced thermoplastic resinous material (20) having a vibration-damping factor not less than 1.0 has a weight not less than 10% nor more than 60% of a weight of the golf club shaft. The fiber reinforced thermoplastic resinous material (20) is disposed on a part of a peripheral surface of the golf club shaft, on an inner peripheral surface thereof or between layers of the fiber reinforced thermosetting resinous material (10).
Abstract:
A golf shaft which features lightness, high crushing strength and high torsion strength with no interlayer peeling, as well as an excellent aesthetic design with a three-dimensional effect which gives the user a sense of depth, and a method for forming the same and a golf club using the same. The golf shaft is produced by baking a plurality of fiber prepreg layers. The shaft is a laminate comprising: a main layer of resin-impregnated high-strength high-elasticity fiber; a metal wire layer laid over the main layer; and a layer of low-elasticity fiber, laid over the metal wire layer, impregnated with resin through which the underlying metal wire layer can be seen.
Abstract:
A shaft adapted to move through a fluid, wherein the shaft has a surface, diameter, and length, and wherein the shaft comprises at least two ridges extending along at least a portion of the length, such that fluid resistance encountered by the shaft as it is moved through the fluid is reduced.
Abstract:
The present invention provides a bio-characteristic value measuring apparatus comprises an input device, a storage device, a measuring device, an arithmetic and control device, and a display device, in which: said input device inputs a personal body data of a test subject; said storage device stores said inputted personal body data; said measuring device measures a physical characteristics of a living body; said arithmetic and control device evaluates a condition of the living body of the test subject based on said physical characteristics and said inputted personal body data; and said display device indicates the inputted personal body data and evaluated result and the likes; wherein in said input device, upon setting the personal body data, a luminescent element corresponding to a section available for an entry operation is lighted up.
Abstract:
This invention, relates to golf club putters, and golf clubs, and the improvement of this invention, is the lead filled shaft system, for the golf club putters, golf clubs, golf club shafts, and golf club putter shafts components, which improves the existing golf club putters with its unique ability, that allows the ball to die in the hole, or get next to the hole, with the correct line of sight. The specific method of the golf club shaft design simulates kind of a semi-anti-gravity effect, on a horizontal plane. In plane terms, this invention used as a golf club putter, slows the speed of the golf ball, using a normal golf putting swing, and the correct line of sight. This invention is described as follows: Utilizing existing, or manufacturing golf club shafts, filled with melted lead, also a variety of these putters will have a hollow area at the bottom of the shaft, right above the putter head, this is where the hollow area is, on the lead filled shaft, from zero to three inches, or more. This invention is not limited, to melted lead filled shafts, the shaft can also be filled with any element, compound or substance.