Patent application number | Description | Published |
20090005188 | Analysis method of golf club - According to the present invention, a torque applied from a golf player to a golf club during a swing is analyzed in a time-series manner. A DLT method is suitable as a determination procedure. Preferably, a link model is used in this analysis. Preferably, the three-dimensional coordinate of the mark provided at a position that corresponds to the link model is determined by a DLT method. Preferable analysis method includes: modeling using a golf club, and at least a part of a golf player who grips a grip member of the golf club to provide a link model in which the golf club is connected with the golf player via a joint; and analyzing the torque that acts on the joint is analyzed during the swing in a time-series manner. This joint is positioned in the vicinity of the grip member. This analysis can be applied to a method of diagnosing a swing, a method of selecting a golf club, and a method of designing a golf club. | 01-01-2009 |
20090298618 | PROCESS FOR DESIGNING RUGGED PATTERN ON GOLF BALL SURFACE - A golf ball | 12-03-2009 |
20100234141 | GOLF BALL - A golf ball | 09-16-2010 |
20100260955 | TUBULAR BODY AND MANUFACTURING METHOD THEREOF - A manufacturing method of the present invention includes the steps of: winding a fiber reinforced resin member containing a fiber and a matrix resin around a mandrel to obtain an intermediate formed body; winding a wrapping tape around the intermediate formed body with an application of a tension; heating the intermediate formed body to cure the matrix resin; and pulling the mandrel out and removing the wrapping tape after the step of heating to obtain a cured tubular body. A base polymer of a base material of the wrapping tape is a polyolefin resin and/or a polyester resin. The step of heating includes: a first heating stage for heating the intermediate formed body at a temperature of 70° C. or higher and 90° C. or lower for a time of 120 minutes or longer and 4320 minutes or shorter; and a second heating stage for heating the intermediate formed body at a temperature of 120° C. or higher and 200° C. or lower for a time of 5 minutes or longer and 20 minutes or shorter after the first heating stage. | 10-14-2010 |
20100326175 | GOLF BALL - On the basis of a surface shape appearing at a predetermined point moment by moment during rotation of a golf ball having numerous dimples on its surface, a data constellation regarding a parameter dependent on a surface shape of the golf ball is calculated. A preferable parameter is a distance between an axis of the rotation and the surface of the golf ball. Another preferable parameter is a volume of space between a surface of a phantom sphere and the surface of the golf ball. Fourier transformation is performed on the data constellation to obtain a transformed data constellation. On the basis of a peak value and an order of a maximum peak of the transformed data constellation, an aerodynamic characteristic of the golf ball is determined. The peak value and the order of the maximum peak are calculated for each of PH rotation and POP rotation. | 12-30-2010 |
20110130214 | METHOD FOR DESIGNING GOLF CLUB AND GOLF CLUB - A designing method of the present invention includes the steps of: measuring a golf swing to obtain a measured result; obtaining a swing model provided with a link model and joint torque data based on the measured result, the link model having at least two links; performing simulation for swing the golf club using the swing model; and obtaining head information in a specific situation during a swing based on a result of the simulation. In the designing method, a plurality of specifications of the golf club and/or the plurality of swing models are used to obtain the plurality of head information, and stability is evaluated using a difference between the head information. In the designing method, it was found that a great lateral moment of inertia of a head and a small depth of a center of gravity of the head contribute to the stability. | 06-02-2011 |
20110136590 | GOLF BALL - A cross-sectional shape of each of dimples | 06-09-2011 |
20110177881 | GOLF CLUB HEAD - A golf club head is provided with a crown, a sole, and a continuously extending rib (X). The rib (X) is provided on an inner surface of the head. Preferably, the rib (X) is substantially parallel to a toe-heel direction. When a maximum amplitude of vibration in a first-order mode in a state where the rib (X) is removed is defined as Ma1 and an amplitude ratio with respect to the maximum amplitude Ma1 is defined as Rh (%), disposal of the rib (X) satisfies the following items (a), (b), and (c):
| 07-21-2011 |
20110300959 | GOLF CLUB FITTING METHOD, DEVICE THEREOF, AND ANALYSIS METHOD - The analysis method includes steps of acquiring measurement data obtained from swings and values of hitting results (flight distance or the like) (STEP | 12-08-2011 |
20110312439 | GOLF CLUB HEAD - A golf club head | 12-22-2011 |
20120100930 | GOLF CLUB HEAD - A golf club head | 04-26-2012 |
20120108364 | METHOD FOR FITTING GOLF CLUB - A fitting method according to the present invention includes steps of preparing a relationship C of a shaft flex point Y and a face angle X before impact or at impact; measuring a subject's face angle X before impact or at impact by using a test club; and selecting a shaft fitted to the subject on the basis of the measured face angle X and the relationship C. The relationship C is created by using correlation R of the face angle before impact or at impact and a hitting result. The correlation R is based on hitting results of a plurality of golf clubs having different shaft flex point rates. Preferably, the relationship C is a relational expression F | 05-03-2012 |
20120266651 | GOLF BALL - On the basis of a surface shape appearing at a predetermined point moment by moment during rotation of a golf ball having numerous dimples on its surface, a data constellation regarding a parameter dependent on a surface shape of the golf ball is calculated. A preferable parameter is a distance between an axis of the rotation and the surface of the golf ball. Another preferable parameter is a volume of space between a surface of a phantom sphere and the surface of the golf ball. Fourier transformation is performed on the data constellation to obtain a transformed data constellation. On the basis of a peak value and an order of a maximum peak of the transformed data constellation, an aerodynamic characteristic of the golf ball is determined. The peak value and the order of the maximum peak are calculated for each of PH rotation and POP rotation. | 10-25-2012 |
20120278048 | METHOD FOR PREDICTING MODAL DAMPING RATIO OF COMPOSITE HEAD - A prediction method according to the present invention is a method for predicting a modal damping ratio of a composite head including two or more kinds of materials including a first material and a second material. The method includes the steps of: presuming at least a coefficient Px of a generalized Maxwell model M1 in the first material using a known material damping ratio ζ1; obtaining a calculation model of the head using the generalized Maxwell model M1; and calculating the modal damping ratio of the head based on analysis of the head using the calculation model. Preferably, the Maxwell model is further used also for the second material. Preferably, the method further includes the step of presuming a coefficient Py of a generalized Maxwell model M2 in the second material using a known material damping ratio ζ2. | 11-01-2012 |
20130029783 | GOLF CLUB HEAD AND METHOD FOR PREDICTING CARRY DISTANCE PERFORMANCE THEREOF - A hollow golf club head has: a moment of inertia Ix around a vertical axis of 4500 to 5900 g sq·cm; and a moment of inertia Iy around an inclined axis of 5300 to 6800 g sq·cm, which satisfy Iy=<1.071 I×Ix+482 g sq·cm. The vertical axis passes through the center of gravity of the head under a standard state in which the head is set on a horizontal plane so that a shaft center line is inclined at a lie angle of 60 degrees with respect to the horizontal plane within a vertical plane and a club face lies at the loft angle. The inclined axis passes through the center of gravity of the head and is inclined downwardly toward the toe from the heel at 62 degrees with respect to the horizontal plane within a plane parallel with the above-mentioned vertical plane. | 01-31-2013 |
20130095957 | PROCESS FOR DESIGNING DIMPLE PATTERN OF GOLF BALL - A golf ball | 04-18-2013 |
20130109502 | GOLF CLUB HEAD | 05-02-2013 |
20130109507 | GOLF BALL | 05-02-2013 |
20130172095 | MEASURING METHOD OF GOLF CLUB HEAD - A head measuring method of the present invention includes:
| 07-04-2013 |
20130288818 | GOLF CLUB - A golf club c | 10-31-2013 |
20130288829 | FITTING METHOD OF GOLF CLUB - This fitting method includes, for example, the following steps A1 to E1:
| 10-31-2013 |
20130324305 | GOLF CLUB HEAD AND METHOD FOR MANUFACTURING THE SAME - A golf club head comprises a metal member made of at least one kind of metal material and a resin member made of a resin material welded to the metal member. A method for manufacturing the golf club head comprises a step of welding the resin member to the metal member. | 12-05-2013 |
20140128179 | PROCESS FOR DESIGNING RUGGED PATTERN ON GOLF BALL SURFACE - A golf ball has, on a surface thereof, a rugged pattern composed of a land and a large number of dimples. A method for designing the rugged pattern includes the steps of:
| 05-08-2014 |
20140187356 | GOLF BALL - A golf ball | 07-03-2014 |
20140295997 | PROCESS FOR DESIGNING RUGGED PATTERN ON GOLF BALL SURFACE - A golf ball | 10-02-2014 |