Patents by Inventor Takaharu Takechi
Takaharu Takechi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8231481Abstract: A golf club head of this invention is a hollow golf club head which includes a face portion, a crown portion, a sole portion, and a side portion. The wall thickness of a face/crown bending portion, which is molded by casting and forms the boundary between the face portion and the crown portion, is smaller on the toe side than on the heel side.Type: GrantFiled: July 1, 2009Date of Patent: July 31, 2012Assignee: Bridgestone Sports Co., Ltd.Inventor: Takaharu Takechi
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Publication number: 20120184390Abstract: An iron golf club head includes a hosel part embedded member installed in a hosel part thereof, a sole part embedded member installed in a sole part thereof, and a top part embedded member installed in an upper portion of a face part of thereof. In a shank part (neck part) connecting the hosel part to the body part, a connecting embedded member for connecting the hosel part embedded member to the sole part embedded member is installed. These embedded members are covered with a synthetic resin layer. The hosel part embedded member and the connecting embedded member each are preferably made of a metal.Type: ApplicationFiled: December 30, 2011Publication date: July 19, 2012Applicant: BRIDGESTONE SPORTS CO., LTD.Inventor: Takaharu TAKECHI
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Publication number: 20120157229Abstract: A clubhead of a golf club which is a metallic hollow clubhead includes: a face portion; a crown portion; a hosel portion; and a lower part including a sole portion and side portions, wherein: the hosel portion and the crown portion are welded to the lower part; and the lower part is pressed out of a material plate and is thereafter subjected to a chemical polishing so that a thickness of the lower part varies by position.Type: ApplicationFiled: December 19, 2011Publication date: June 21, 2012Applicant: BRIDGESTONE SPORTS CO., LTD.Inventor: Takaharu TAKECHI
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Patent number: 8177664Abstract: A putter head has the performance and characteristics of a putter, such as appearance, center of gravity, moment of inertia, ease of finding a putting line, and ease of setting, and can be adjusted by easily changing the shape of putter head by the golfer himself or herself, and a putter head set is also provided. A putter head includes a body member having a face surface for hitting a ball, and a back member detachably installed to the body member. The back member is detachably installed to the body member with one screw only.Type: GrantFiled: July 20, 2009Date of Patent: May 15, 2012Assignee: Bridgestone Sports Co., Ltd.Inventors: Daisuke Horii, Takaharu Takechi
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Publication number: 20110256959Abstract: A golf club head (1) comprises a head main body (10) having a concave portion (11) formed in the face side and a face plate (20) fixed to the head main body (10). The face plate (20) is mounted on the head main body (10) such that a concave step portion (21) engages with a convex step portion (16a) of the head main body (10), and the upper edge portion, lower edge portion, and toe-side edge portion of the face plate (20) abut against edge portions (13), (14), and (15) of the head main body, respectively. The face plate (20) is laser-welded along its perimeter and fixed to the head main body (10).Type: ApplicationFiled: June 24, 2011Publication date: October 20, 2011Applicant: BRIDGESTONE SPORTS CO., LTD.Inventor: Takaharu Takechi
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Patent number: 8012040Abstract: A golf club head (1) comprises a head main body (10) having a concave portion (11) formed in the face side and a face plate (20) fixed to the head main body (10). The face plate (20) is mounted on the head main body (10) such that a concave step portion (21) engages with a convex step portion (16a) of the head main body (10), and the upper edge portion, lower edge portion, and toe-side edge portion of the face plate (20) abut against edge portions (13), (14), and (15) of the head main body, respectively. The face plate (20) is laser-welded along its perimeter and fixed to the head main body (10).Type: GrantFiled: February 12, 2009Date of Patent: September 6, 2011Assignee: Bridgestone Sports Co., Ltd.Inventor: Takaharu Takechi
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Publication number: 20110159987Abstract: A hollow golf club head has a head body having a face aperture part and a face member held to the face aperture part by welding, the face member formed by forging a rolled material of a titanium alloy having an ? phase, and the face member comprising a thick-material part positioned in the center of the face member, an outer peripheral part positioned at the periphery of the thick-material part, and a thin-material part partially positioned between the thick-material part and the outer peripheral part. The thick-material part is formed in an area having a shape obtained by depressing a substantially elliptical or substantially circular shape in a substantially arcuate shape toward the center of the ellipse at two opposite sides thereof. The thick-material part, the thin-material part, and the peripheral part are formed by the forging so as to destroy an orientation of the ?-phase.Type: ApplicationFiled: December 21, 2010Publication date: June 30, 2011Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Takaharu TAKECHI, Kozue WADA, Hideo MATSUNAGA
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Publication number: 20110034262Abstract: A wood type golf club head according to this invention includes a face portion and a crown portion. A center-of-gravity position mark which indicates a point where the center of gravity of the wood type golf club head is projected to the crown portion is formed on the surface of the crown portion.Type: ApplicationFiled: August 3, 2010Publication date: February 10, 2011Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Takaharu Takechi, Yasunori Imamoto, Tomoe Watanabe
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Publication number: 20110028236Abstract: An iron golf club head has a faceplate for hitting a golf ball, the faceplate having a back face; a viscoelastic body fixed onto the back face of the faceplate; and a backplate for sandwiching the viscoelastic body with the faceplate, the backplate having a flange that extends out of the periphery of the viscoelastic body and is fixed onto the back face of the faceplate.Type: ApplicationFiled: July 29, 2010Publication date: February 3, 2011Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Takaharu TAKECHI, Daisuke HORII
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Publication number: 20110028232Abstract: A golf club includes a shaft in which a brightness of a color of the shaft from a grip side toward a head side is changed from darkness to brightness in a plurality of stages.Type: ApplicationFiled: July 30, 2010Publication date: February 3, 2011Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Yoshifumi NAKAJIMA, Takaharu TAKECHI, Tomoe WATANABE, Daisuke HORII
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Publication number: 20100167836Abstract: A putter head has the performance and characteristics of a putter, such as appearance, center of gravity, moment of inertia, ease of finding a putting line, and ease of setting, and can be adjusted by easily changing the shape of putter head by the golfer himself or herself, and a putter head set is also provided. A putter head includes a body member having a face surface for hitting a ball, and a back member detachably installed to the body member. The back member is detachably installed to the body member with one screw only.Type: ApplicationFiled: July 20, 2009Publication date: July 1, 2010Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Daisuke Horii, Takaharu Takechi
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Publication number: 20100087271Abstract: A golf club head of this invention is a hollow golf club head which includes a face portion, a crown portion, a sole portion, and a side portion. The wall thickness of a face/crown bending portion, which is molded by casting and forms the boundary between the face portion and the crown portion, is smaller on the toe side than on the heel side.Type: ApplicationFiled: July 1, 2009Publication date: April 8, 2010Applicant: BRIDGESTONE SPORTS CO., LTD.Inventor: Takaharu Takechi
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Publication number: 20090325729Abstract: A golf club head (1) comprises a head main body (10) having a concave portion (11) formed in the face side and a face plate (20) fixed to the head main body (10). The face plate (20) is mounted on the head main body (10) such that a concave step portion (21) engages with a convex step portion (16a) of the head main body (10), and the upper edge portion, lower edge portion, and toe-side edge portion of the face plate (20) abut against edge portions (13), (14), and (15) of the head main body, respectively. The face plate (20) is laser-welded along its perimeter and fixed to the head main body (10).Type: ApplicationFiled: February 12, 2009Publication date: December 31, 2009Applicant: Bridgestone Sports Co., Ltd.Inventor: Takaharu Takechi