Patents by Inventor Masaomi Hiruta
Masaomi Hiruta 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: 8241140Abstract: A hollow golf club head made of metal includes a face portion, a sole portion, a side portion, and a crown portion. The crown portion and at least a part of the side portion have a Young's modulus lower than the face portion and the sole portion.Type: GrantFiled: March 18, 2004Date of Patent: August 14, 2012Assignee: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Masaomi Hiruta
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Patent number: 8216089Abstract: This invention provides a golf club head including a face member. The face member includes a face portion forming a face, and a crown extending portion extending backward from the upper edge of the face portion. The width of the crown extending portion in a face to back direction at the toe side is larger than that in the face to back direction at the heel side.Type: GrantFiled: July 30, 2010Date of Patent: July 10, 2012Assignee: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20110269567Abstract: This invention provides a golf club head in which a plurality of scorelines are formed in its face surface. The golf club head includes a first fine groove formed in the face surface to extend parallel to the scorelines, and a second fine groove formed in the face surface to intersect with the first fine groove.Type: ApplicationFiled: March 17, 2011Publication date: November 3, 2011Applicant: BRIDGESTONE SPORTS CO., LTDInventors: Wataru BAN, Masaomi HIRUTA
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Patent number: 7942759Abstract: A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. The golf club head 1 is formed by integrating a head body 10 and a face plate 30 with each other by welding such as laser welding or plasma welding. A thick part 20 is provided only in the central portion in the toe-heel direction of the cross corner portion between the face part 2 and the sole part 4. The width in the toe-heel direction of the thick part 20 is 20 mm or narrower. Therefore, the golf club head in accordance with the present invention can increase a carry on average even if being used by an amateur golfer who is prone to hit a ball by varied hit points across the clubface.Type: GrantFiled: October 31, 2007Date of Patent: May 17, 2011Assignee: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Patent number: 7883431Abstract: There is provided a golf club head capable of increasing carry on average even if being used by an amateur golfer who is prone to hit a ball with various hit points across the clubface. A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. The golf club head 1 is formed by integrating a head body 10 and a face plate 30 with each other by welding such as laser welding or plasma welding. A thick part 20 is provided only in the central portion in the toe-heel direction of the cross corner portion between the face part 2 and the sole part 4. The width in the toe-heel direction of the thick part 20 is 20 mm or narrower.Type: GrantFiled: October 11, 2007Date of Patent: February 8, 2011Assignee: Bridgestone Sports Co., LtdInventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20100292023Abstract: This invention provides a golf club head including a face member. The face member includes a face portion forming a face, and a crown extending portion extending backward from the upper edge of the face portion. The width of the crown extending portion in a face to back direction at the toe side is larger than that in the face to back direction at the heel side.Type: ApplicationFiled: July 30, 2010Publication date: November 18, 2010Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Patent number: 7819758Abstract: This invention provides a golf club head including a face member. The face member includes a face portion forming a face, and a crown extending portion extending backward from the upper edge of the face portion. The width of the crown extending portion in a face to back direction at the toe side is larger than that in the face to back direction at the heel side.Type: GrantFiled: July 16, 2008Date of Patent: October 26, 2010Assignee: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Patent number: 7819759Abstract: The present invention provides a golf club head capable of increasing carry on average even if being used by an amateur golfer who is prone to hit a ball by varied hit points of clubface. A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. A thick part 10 is provided near the central portion in the toe-heel direction of the rear portion of the crown part 3. The distance a between a foremost portion 10f the thick part 10 and the foremost portion of the crown part 3 is 20 to 80% of the total length L of the crown part 3.Type: GrantFiled: September 25, 2007Date of Patent: October 26, 2010Assignee: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Patent number: 7798916Abstract: This invention provides a hollow metal golf club head including at least a face portion, sole portion, side portion, and crown portion. This golf club head includes a head main body having an opening in the face portion, and a face plate engaged and welded with the opening. The head main body comprises a protruding portion which forms a part of the face portion and protrudes upward from a central portion, in a toe-and-heel direction, of a corner portion between the face portion and the sole portion in the golf club head. The face plate comprises s a recessed portion which extends upward from the lower edge of the face plate and engages with the protruding portion.Type: GrantFiled: March 3, 2008Date of Patent: September 21, 2010Assignee: Bridgestone Sports Co., LtdInventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Patent number: 7686706Abstract: This invention provides a golf club head including a head main body, a face plate and a hollow portion. The head main body includes an opening in a face portion, and the opening is provided with a plurality of pawls to receive the face plate which is to fit in the opening. The pawls include a large pawl and a small pawl. The large pawl is arranged in each of a heel-side upper portion and a toe-side lower portion and the small pawl is arranged in at least either one of a heel-side lower portion and a toe-side upper portion when the opening is divided into four vertically and horizontally about a face center as the center. The face plate is fitted in the opening and fixed by welding.Type: GrantFiled: April 21, 2008Date of Patent: March 30, 2010Assignee: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20090247321Abstract: This invention provides a golf club head including a face member. The face member includes a face portion forming a face, and a crown extending portion extending backward from the upper edge of the face portion. The width of the crown extending portion in a face to back direction at the toe side is larger than that in the face to back direction at the heel side.Type: ApplicationFiled: July 16, 2008Publication date: October 1, 2009Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20080261720Abstract: This invention provides a golf club head including a head main body, a face plate and a hollow portion. The head main body includes an opening in a face portion, and the opening is provided with a plurality of pawls to receive the face plate which is to fit in the opening. The pawls include a large pawl and a small pawl. The large pawl is arranged in each of a heel-side upper portion and a toe-side lower portion and the small pawl is arranged in at least either one of a heel-side lower portion and a toe-side upper portion when the opening is divided into four vertically and horizontally about a face center as the center. The face plate is fitted in the opening and fixed by welding.Type: ApplicationFiled: April 21, 2008Publication date: October 23, 2008Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20080261719Abstract: There is provided a golf club head capable of increasing carry on average even if being used by an amateur golfer who is prone to hit a ball with various hit points across the clubface. A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. The golf club head 1 is formed by integrating a head body 10 and a face plate 30 with each other by welding such as laser welding or plasma welding. A thick part 20 is provided only in the central portion in the toe-heel direction of the cross corner portion between the face part 2 and the sole part 4. The width in the toe-heel direction of the thick part 20 is 20 mm or narrower.Type: ApplicationFiled: October 11, 2007Publication date: October 23, 2008Applicant: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20080220894Abstract: This invention provides a hollow metal golf club head including at least a face portion, sole portion, side portion, and crown portion. This golf club head includes a head main body having an opening in the face portion, and a face plate engaged and welded with the opening. The head main body comprises a protruding portion which forms a part of the face portion and protrudes upward from a central portion, in a toe-and-heel direction, of a corner portion between the face portion and the sole portion in the golf club head. The face plate comprises s a recessed portion which extends upward from the lower edge of the face plate and engages with the protruding portion.Type: ApplicationFiled: March 3, 2008Publication date: September 11, 2008Applicant: Bridgestone Sports Co., Ltd.Inventors: Hideo MATSUNAGA, Makoto Kubota, Masaomi Hiruta
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Publication number: 20080139338Abstract: A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. The golf club head 1 is formed by integrating a head body 10 and a face plate 30 with each other by welding such as laser welding or plasma welding. A thick part 20 is provided only in the central portion in the toe-heel direction of the cross corner portion between the face part 2 and the sole part 4. The width in the toe-heel direction of the thick part 20 is 20 mm or narrower. Therefore, the golf club head in accordance with the present invention can increase a carry on average even if being used by an amateur golfer who is prone to hit a ball by varied hit points across the clubface.Type: ApplicationFiled: October 31, 2007Publication date: June 12, 2008Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20080090676Abstract: The present invention provides a golf club head capable of increasing carry on average even if being used by an amateur golfer who is prone to hit a ball by varied hit points of clubface. A golf club head 1 has a face part 2, a crown part 3, a sole part 4, a side part 5, and a hosel part 6, which are formed of titanium or a titanium alloy. A thick part 10 is provided near the central portion in the toe-heel direction of the rear portion of the crown part 3. The distance a between a foremost portion 1 Of the thick part 10 and the foremost portion of the crown part 3 is 20 to 80% of the total length L of the crown part 3.Type: ApplicationFiled: September 25, 2007Publication date: April 17, 2008Applicant: Bridgestone Sports Co., Ltd.Inventors: Hideo Matsunaga, Makoto Kubota, Masaomi Hiruta
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Publication number: 20050159239Abstract: A golf club head includes a front body formed of a metal material, an FRP body, a metallic sole plate, and a weight member. The front body has a face portion, a metal sole portion, a metal side portion (toe), a metal crown portion, a metal side portion (heel), and a hosel portion. A slight gap in a range of 4 mm to 12 mm is formed between a front side of the sole plate and the metal sole portion. This part is formed of the FRP body. Preferably, the weight of the front body is in a range of 20% to 70% of the weight of the golf club head.Type: ApplicationFiled: November 5, 2004Publication date: July 21, 2005Inventors: Yasunori Imamoto, Hiroshi Ezaki, Masaomi Hiruta
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Publication number: 20040204264Abstract: A hollow golf club head made of metal includes a face portion, a sole portion, a side portion, and a crown portion. The crown portion and at least a part of the side portion have a Young's modulus lower than the face portion and the sole portion.Type: ApplicationFiled: March 18, 2004Publication date: October 14, 2004Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hideo Matsunaga, Masaomi Hiruta
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Patent number: 6783466Abstract: This golf club head is constituted by a front part 1 including a face portion 2 and a crown main portion 3, and a back part 10 forming the remaining portion of the golf club head. A metal material forming the front part 1 has lower Young's modulus than that of a metal material forming the back part 10. The front part 1 and the back part 10 are welded. The thickness of the center of the face portion 2 is larger than the thickness of the periphery thereof. The thickness of the vicinity of a highest point 3A of the crown is small.Type: GrantFiled: October 19, 2001Date of Patent: August 31, 2004Assignee: Bridgestone Sports Co., Ltd.Inventors: Teruaki Seki, Masaomi Hiruta, Hideo Matsunaga
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Publication number: 20020091015Abstract: This golf club head is constituted by a front part 1 including a face portion 2 and a crown main portion 3, and a back part 10 forming the remaining portion of the golf club head. A metal material forming the front part 1 has lower Young's modulus than that of a metal material forming the back part 10. The front part 1 and the back part 10 are welded. The thickness of the center of the face portion 2 is larger than the thickness of the periphery thereof. The thickness of the vicinity of a highest point 3A of the crown is small.Type: ApplicationFiled: October 19, 2001Publication date: July 11, 2002Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Teruaki Seki, Masaomi Hiruta, Hideo Matsunaga