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: 11806592Abstract: A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.Type: GrantFiled: December 8, 2021Date of Patent: November 7, 2023Assignee: BRIDGESTONE SPORTS CO., LTD.Inventors: Kozue Wada, Takaharu Takechi
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Publication number: 20230201678Abstract: A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion and a back portion. The face portion includes a front face and a rear face facing away from each other, the front face being a ball-striking face. A non-metallic member is fixed to the rear face. An abutment portion including a tip portion with a curved surface is provided on the back portion. The abutment portion is passed through the back portion, and the curved surface of the tip portion contacts the non-metallic member.Type: ApplicationFiled: December 1, 2022Publication date: June 29, 2023Inventors: Kozue WADA, Takaharu TAKECHI
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Publication number: 20230201679Abstract: A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion, a cavity portion provided behind the face portion, and a protrusion provided on a lower part of a rear face of the face portion. The protrusion includes a first recess extending from an upper surface of the protrusion toward a sole, a second recess positioned closer to a toe than the first recess is and extending from the upper surface of the protrusion toward the sole, and a thick portion provided between the first and second recesses in a toe-heel direction. The first and second recesses each has a substantially trapezoidal shape in a cross-sectional view taken along a plane that is parallel to a front face of the face portion and passes through a deepest part of each of the first and second recesses.Type: ApplicationFiled: December 1, 2022Publication date: June 29, 2023Inventors: Hiroshi TAKAHASHI, Takaharu TAKECHI
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Publication number: 20220193508Abstract: A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.Type: ApplicationFiled: December 8, 2021Publication date: June 23, 2022Inventors: Kozue WADA, Takaharu TAKECHI
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Patent number: 11338179Abstract: A golf club head having a hollow structure is provided. The golf club head includes a face, and a body including at least a crown, a sole, and a hosel chamber. The crown, the sole, and the hosel chamber include laminated layers of a fiber-reinforced resin. The crown includes at least one first rigidity control portion that partially extends in a toe-heel direction. The sole includes at least one second rigidity control portion that extends from a back surface side of the face toward a back end of the body. One of the first rigidity control portion and the second rigidity control portion decreases flexural rigidity in a face-back direction, and the other of the first rigidity control portion and the second rigidity control portion increases flexural rigidity in the face-back direction.Type: GrantFiled: June 16, 2021Date of Patent: May 24, 2022Assignee: BRIDGESTONE SPORTS CO., LTD.Inventor: Takaharu Takechi
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Publication number: 20220016497Abstract: A golf club head having a hollow structure and including a face, a body, and a weight portion is provided. The body includes a crown, a sole, and a hosel chamber. The crown, the sole, and the hosel chamber include laminated layers of a fiber-reinforced resin. The weight portion is formed of a material having a specific gravity greater than specific gravities of the crown and of the sole. The head volume is greater than or equal to 450 cc and less than or equal to 470 cc. The head weight is less than or equal to 200 g. The average thickness of each of the crown and the sole is greater than or equal to 0.7 mm. The weight of the weight portion is greater than or equal to 20 g, and the weight portion is attached to one or both of the crown and the sole.Type: ApplicationFiled: June 16, 2021Publication date: January 20, 2022Inventor: Takaharu TAKECHI
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Publication number: 20220016496Abstract: A golf club head having a hollow structure is provided. The golf club head includes a face, and a body including at least a crown, a sole, and a hosel chamber. The crown, the sole, and the hosel chamber include laminated layers of a fiber-reinforced resin. The crown includes at least one first rigidity control portion that partially extends in a toe-heel direction. The sole includes at least one second rigidity control portion that extends from a back surface side of the face toward a back end of the body. One of the first rigidity control portion and the second rigidity control portion decreases flexural rigidity in a face-back direction, and the other of the first rigidity control portion and the second rigidity control portion increases flexural rigidity in the face-back direction.Type: ApplicationFiled: June 16, 2021Publication date: January 20, 2022Inventor: Takaharu TAKECHI
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Publication number: 20210187366Abstract: A hollow golf club head that includes a face portion, a crown portion, a sole portion, a side portion, and a hosel portion. The head includes a first metal member configured to form the face portion and at least a part of the crown portion, and a second metal member configured to form the sole portion, the side portion, and the hosel portion, and to which the first metal member is joined. The first metal member is a forged member including at least one groove portion. The second metal member is a cast member including at least one reinforcing rib.Type: ApplicationFiled: November 25, 2020Publication date: June 24, 2021Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hiroshi TAKAHASHI, Takaharu TAKECHI
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Patent number: 11020638Abstract: An iron-type golf club head for a golf club includes a body and a face joined to the body. The face includes a front surface including a ball striking surface, and a rear surface facing an interior surface of the body. Multiple independent depressions are formed in the rear surface toward the front surface. Each of the independent depressions is at least partially filled with a non-metallic material.Type: GrantFiled: February 25, 2020Date of Patent: June 1, 2021Assignee: BRIDGESTONE SPORTS CO., LTD.Inventors: Hiroshi Takahashi, Takaharu Takechi
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Publication number: 20200338399Abstract: An iron-type golf club head for a golf club includes a body and a face joined to the body. The face includes a front surface including a ball striking surface, and a rear surface facing an interior surface of the body. Multiple independent depressions are formed in the rear surface toward the front surface. Each of the independent depressions is at least partially filled with a non-metallic material.Type: ApplicationFiled: February 25, 2020Publication date: October 29, 2020Inventors: Hiroshi TAKAHASHI, Takaharu TAKECHI
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Patent number: 9981163Abstract: A golf club head comprises two weight members, and in a reference plan view where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set. The reference imaginary straight line passes through a central axis of a hosel hole and a head gravity center is determined when weight members are not attached. The first imaginary straight line passes through the central axis of the hosel hole and a center of the first opening part. The second imaginary straight line passes through the central axis of the hosel hole and a center of the second opening part. A first angle ?1 between the reference and first imaginary straight lines is ±10 degrees or less, and a second angle ?2 between the reference and second imaginary straight lines is larger than the first angle ?1.Type: GrantFiled: July 22, 2016Date of Patent: May 29, 2018Assignee: Bridgestone Sports Co., Ltd.Inventors: Kozue Wada, Takaharu Takechi
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Patent number: 9937391Abstract: A hollow golf club head having a face part, a sole part, a side part, a crown part, and a hosel part, comprises one or more of inner ribs that are disposed on at least one of the sole part and the side part and that inwardly project from an inner surface of the one, one or more of outer ribs that are disposed on at least the one of the sole part and the side part and that outwardly project from an outer surface of the one, and one of the inner ribs is arranged between the outer ribs in a toe-to-heel direction.Type: GrantFiled: April 29, 2016Date of Patent: April 10, 2018Assignee: Bridgestone Sports Co., Ltd.Inventor: Takaharu Takechi
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Patent number: 9808681Abstract: A hollow golf club head comprises a face part, a sole part, a side part, a crown part, and a hosel part. At least one of the face part and the crown part has portions of two different rigidities that are first and second rigid portions, the first rigid portion has a first rigidity, the second rigid portion is made of the same material as the first rigid portion, and the second rigid portion has the same thickness as the first rigid portion but has a lower rigidity than the first rigidity of the first rigid portion.Type: GrantFiled: May 12, 2016Date of Patent: November 7, 2017Assignee: Bridgestone Sports Co., Ltd.Inventor: Takaharu Takechi
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Publication number: 20170128789Abstract: A golf club head comprises two weight members, and in a reference plan view where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set. The reference imaginary straight line passes through a central axis of a hosel hole and a head gravity center is determined when weight members are not attached. The first imaginary straight line passes through the central axis of the hosel hole and a center of the first opening part. The second imaginary straight line passes through the central axis of the hosel hole and a center of the second opening part. A first angle ?1 between the reference and first imaginary straight lines is ±10 degrees or less, and a second angle ?2 between the reference and second imaginary straight lines is larger than the first angle ?1.Type: ApplicationFiled: July 22, 2016Publication date: May 11, 2017Inventors: Kozue WADA, Takaharu TAKECHI
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Publication number: 20170014691Abstract: A manufacturing method includes a measurement step of measuring a spring effect of a face portion of a hollow golf club head, and a selection step of selecting, based on a measurement result of the measurement step, an adjustment device, out of a plurality of adjustment devices, to be attached to an attachment portion of the golf club head. The plurality of adjustment devices have different degrees of suppression to the spring effect of the face portion from each other.Type: ApplicationFiled: July 11, 2016Publication date: January 19, 2017Applicant: BRIDGESTONE SPORTS CO., LTD.Inventor: Takaharu TAKECHI
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Publication number: 20160346645Abstract: A hollow golf club head comprises a face part, a sole part, a side part, a crown part, and a hosel part. At least one of the face part and the crown part has portions of two different rigidities that are first and second rigid portions, the first rigid portion has a first rigidity, the second rigid portion is made of the same material as the first rigid portion, and the second rigid portion has the same thickness as the first rigid portion but has a lower rigidity than the first rigidity of the first rigid portion.Type: ApplicationFiled: May 12, 2016Publication date: December 1, 2016Inventor: Takaharu TAKECHI
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Publication number: 20160332042Abstract: A hollow golf club head having a face part, a sole part, a side part, a crown part, and a hosel part, comprises one or more of inner ribs that are disposed on at least one of the sole part and the side part and that inwardly project from an inner surface of the one, one or more of outer ribs that are disposed on at least the one of the sole part and the side part and that outwardly project from an outer surface of the one, and one of the inner ribs is arranged between the outer ribs in a toe-to-heel direction.Type: ApplicationFiled: April 29, 2016Publication date: November 17, 2016Inventor: Takaharu TAKECHI
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Patent number: 9421434Abstract: A golf club head having a face part, a sole part, a side part, a crown part and a hosel part, all of which surround a hollow part comprises a penetration hole that is provided on the crown part, penetrating the crown part so that the hollow part is connected with an outer atmosphere of the golf club head and a non-metal cover that is provided over the penetration hole. A recess part, which forms a recess, is provided on a surface of the non-metal cover.Type: GrantFiled: September 14, 2015Date of Patent: August 23, 2016Assignee: Bridgestone Sports Co., Ltd.Inventors: Masaya Takagi, Takaharu Takechi, Tomonori Kitagawa
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Patent number: D763376Type: GrantFiled: November 20, 2014Date of Patent: August 9, 2016Assignee: Bridgestone Sports Co., Ltd.Inventors: Takaharu Takechi, Tomonori Kitagawa, Masaya Takagi, Kozue Wada, Hiroshi Takahashi
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Patent number: D763377Type: GrantFiled: November 20, 2014Date of Patent: August 9, 2016Assignee: Bridgestone Sports Co., Ltd.Inventors: Takaharu Takechi, Tomonori Kitagawa, Masaya Takagi, Kozue Wada, Hiroshi Takahashi