Patents by Inventor Hiroshi Yamaoka

Hiroshi Yamaoka 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).

  • Patent number: 11498366
    Abstract: In a tire having composite grooves provided on a shoulder land portion, dry performance and wet performance are improved. The tire includes a tread portion 2. The tread portion 2 includes a first shoulder land portion 13. The first shoulder land portion 13 has shoulder lateral grooves 15 and shoulder composite grooves 20. The shoulder lateral grooves 15 and the shoulder composite grooves 20 are each curved so as to be convex in a tire circumferential direction. Each shoulder composite groove 20 includes, in a cross section thereof, a sipe element 21 having a width not greater than 1.5 mm and extending from a tread surface of the first shoulder land portion 13 in a tire radial direction, and a groove element 22 connected to an inner side in the tire radial direction of the sipe element 21 and having a width greater than 1.5 mm.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: November 15, 2022
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Mari Mishima, Hiroshi Yamaoka
  • Publication number: 20220314701
    Abstract: A tire includes a tread portion including a first land portion, the first land portion being provided with a plurality of first sipes. The plurality of first sipes extends in an arc shape manner. The plurality of first sipes is arranged on the first land portion without communicating with lateral grooves extending in a tire axial direction. In a tread plan view, a virtual sipe reference line of each of the plurality of first sipes has an angle equal to or less than 10 degrees with respect to a tire circumferential direction, wherein the virtual sipe reference line is a straight line that connects both ends of each of the plurality of first sipes.
    Type: Application
    Filed: March 10, 2022
    Publication date: October 6, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Ryotaro KITAHARA, Hiroshi YAMAOKA
  • Publication number: 20220314702
    Abstract: A tire includes a tread portion provided with a first land region demarcated between a shoulder circumferential groove and a tread edge. The first land region is provided with first sipes extending in a tire circumferential direction, axial sipes, and first axial grooves extending from the tread edge. The first sipes are not connected with the first axial grooves. Each of the axial sipes has an axially inner end connected with the shoulder circumferential groove. Each of the axial sipes has an axially outer end connected with one of the first sipes.
    Type: Application
    Filed: March 10, 2022
    Publication date: October 6, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Takeru IWASHITA, Hiroshi YAMAOKA
  • Patent number: 11457298
    Abstract: Provided is a display device that includes a display on which an image is displayed on a display surface, a rear cover arranged on a back surface side of the display, and an upper speaker and a lower speaker arranged between the display and the rear cover and located so as to be separated vertically from each other, in which an upper slit functioning as a passage hole for sound output from the upper speaker is located above the display, a lower slit functioning as a passage hole for sound output from the lower speaker is located below the display, and a vertical width of the lower slit is larger than a vertical width of the upper slit.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: September 27, 2022
    Assignee: SONY GROUP CORPORATION
    Inventors: Tatsuya Sakata, Hiroaki Maeshiba, Daisuke Yamaoka, Junji Hagio, Hiroshi Masuda
  • Patent number: 11433711
    Abstract: In a tire having a composite groove provided on a shoulder land portion, the durability of the shoulder land portion is improved. The tire includes a tread portion. The tread portion includes a first shoulder land portion including a first tread edge. The first shoulder land portion has a shoulder composite groove, and a recess formed on a buttress surface. The recess includes an opening edge on the buttress surface, a bottom surface along the buttress surface, and an inner wall surface connecting the opening edge to the bottom surface. The shoulder composite groove includes, in a transverse cross section thereof, a sipe element having a width not greater than 1.5 mm and extending in a tire radial direction, and a groove element connected to an inner side in the tire radial direction of the sipe element and having a width greater than 1.5 mm. The groove element is open at the bottom surface of the recess.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: September 6, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Hiroshi Yamaoka, Yoshiaki Kanematsu
  • Publication number: 20220194138
    Abstract: A tire has a tread portion provided with grooves. The ground contact area of the tread portion has ground contact lengths in the tire circumferential direction which include a crown ground contact length LC at the tire equator and a shoulder ground contact length LS at a position spaced apart from the tire equator by 80% of a half tread width Tw. The crown ground contact length LC is 0.95 to 1.05 times the shoulder ground contact length LS. Groove depths of the respective grooves are determined so as to satisfy specific mathematical equations based on a reference virtual groove G0 having a predetermined groove depth d0 and defined at the tire equator.
    Type: Application
    Filed: December 2, 2021
    Publication date: June 23, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Hiroshi YAMAOKA, Yutaro INADA
  • Publication number: 20220161605
    Abstract: Provided is a tire including a tread portion. The tread portion can include a first shoulder land portion. The first shoulder land portion 11 can include a shoulder lateral groove and a shoulder sipe. The shoulder lateral groove can include a minimal portion in which a groove width of the shoulder lateral groove is smallest, between a ground contact surface and a groove bottom of the shoulder lateral groove. A width of the shoulder sipe may not be greater than 1.5 mm. An internal groove having a groove width greater than the width of the shoulder sipe can be continuously disposed inwardly of the shoulder sipe in a tire radial direction. The internal groove can be disposed inwardly of the minimal portion and outwardly of the groove bottom of the shoulder lateral groove, in the tire radial direction.
    Type: Application
    Filed: November 18, 2021
    Publication date: May 26, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Yoshifumi KAWAGOE, Koichi NAKAJIMA, Yoshiaki KANEMATSU, Hiroshi YAMAOKA
  • Patent number: 11148473
    Abstract: A tyre includes a tread portion including a first land portion having a circumferentially extending first edge and a circumferentially extending second edge on its ground contacting surface. The first land portion is provided with first lateral grooves extending from the first edge and terminating within the first land portion, second lateral grooves extending from the second edge and terminating within the first land portion, and first sipes. Each first sipe extends from a first end thereof opened at the second edge toward the first edge, and turns in a direction within the first land portion to extend to a second end thereof opened at the second edge at a different location from the first end.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: October 19, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hiroshi Yamaoka
  • Patent number: 11001102
    Abstract: A tire includes a middle land portion between a crown main groove and a shoulder main groove. The middle land portion is provided with a first middle lug groove extending axially outwardly from the crown main groove, a second middle lug groove extending axially inwardly from the shoulder main grooves wherein the first and second middle lug grooves are arranged alternately in a tire circumferential direction, and a first middle sipe provided between the first and second middle lug grooves. The first middle sipe includes a crown-side middle sipe element extending axially outwardly from the crown main groove, a shoulder-side middle sipe element extending axially inwardly from the shoulder main groove at a location different from an extension line of the crown-side middle sipe element and a connecting middle sipe element connecting therebetween.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: May 11, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hiroshi Yamaoka
  • Patent number: 10994575
    Abstract: A tire comprises a center land region 25 provided with center sipes 7 having open ends 7E13 connected with a first center main groove 13 and a first middle land region 23 provided with middle sipes 8 having open ends 8E13 and 8E14 connected with the first center main groove 13 and/or a first shoulder main groove 14. The center sipes 7 include hook-shaped center sipes 55 crossing the center land region 25, and the middle sipes 8 include hook-shaped middle sipes 45 crossing the first middle land region 23.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: May 4, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Toshiki Horiguchi, Hiroshi Yamaoka
  • Patent number: 10894446
    Abstract: A tire comprises a tread portion 2. The tread portion 2 comprises a first main groove 11 and a second main groove 12 extending continuously in a tire circumferential direction, and a land region 21 defined between the first main groove 11 and the second main groove 12. The land region 21 is provided with a plurality of lateral grooves 15. Each of the lateral grooves 15 comprises a first lug groove portion 16 extending obliquely with respect to a tire axial direction from the first main groove 11, a second lug groove portion 17 extending obliquely in a same direction as the first lug groove portion 16 from the second main groove 12, and a sipe portion 18 extending obliquely in an opposite direction to the first lug groove portion 16 so as to connect between the first lug groove portion 16 and the second lug groove portion 17.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: January 19, 2021
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hiroshi Yamaoka
  • Publication number: 20200376898
    Abstract: In a tire having a composite groove provided on a shoulder land portion, the durability of the shoulder land portion is improved. The tire includes a tread portion. The tread portion includes a first shoulder land portion including a first tread edge. The first shoulder land portion has a shoulder composite groove, and a recess formed on a buttress surface. The recess includes an opening edge on the buttress surface, a bottom surface along the buttress surface, and an inner wall surface connecting the opening edge to the bottom surface. The shoulder composite groove includes, in a transverse cross section thereof, a sipe element having a width not greater than 1.5 mm and extending in a tire radial direction, and a groove element connected to an inner side in the tire radial direction of the sipe element and having a width greater than 1.5 mm. The groove element is open at the bottom surface of the recess.
    Type: Application
    Filed: May 21, 2020
    Publication date: December 3, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Hiroshi YAMAOKA, Yoshiaki KANEMATSU
  • Publication number: 20200376899
    Abstract: A tire comprises a tread portion axially divided into four land regions. The tire has a mounting direction to a vehicle and the land regions 4 include a widest outboard middle land region. The outboard middle land region is provided with first, second and third inclined grooves. The first inclined groove extends from a crown main groove and terminates within the outboard middle land region. The second inclined groove has its both ends terminated within the outboard middle land region. The third inclined groove intersects the first and second inclined grooves.
    Type: Application
    Filed: May 21, 2020
    Publication date: December 3, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Yosuke KOMORI, Hiroshi YAMAOKA, Yuta SAKAKIBARA
  • Publication number: 20200376894
    Abstract: In a tire having composite grooves provided on a shoulder land portion, dry performance and wet performance are improved. The tire includes a tread portion 2. The tread portion 2 includes a first shoulder land portion 13. The first shoulder land portion 13 has shoulder lateral grooves 15 and shoulder composite grooves 20. The shoulder lateral grooves 15 and the shoulder composite grooves 20 are each curved so as to be convex in a tire circumferential direction. Each shoulder composite groove 20 includes, in a cross section thereof, a sipe element 21 having a width not greater than 1.5 mm and extending from a tread surface of the first shoulder land portion 13 in a tire radial direction, and a groove element 22 connected to an inner side in the tire radial direction of the sipe element 21 and having a width greater than 1.5 mm.
    Type: Application
    Filed: April 17, 2020
    Publication date: December 3, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Mari MISHIMA, Hiroshi YAMAOKA
  • Publication number: 20200376900
    Abstract: A tyre includes a tread portion provided with a circumferential groove and a lateral groove. The at least one lateral groove includes a connected portion connected to the circumferential groove. The circumferential groove includes a groove bottom provided with groove bottom protruding portions protruding outwardly in the tyre radial direction. Each groove bottom protruding portion includes a first surface portion extending in the tyre radial direction and facing a first circumferential direction, and a second surface portion arranged on a second circumferential direction opposite to the first circumferential direction and extending at a larger angle with respect to the tyre radial direction than that of the first surface portion. In a tread plan view, at least a part of the groove bottom protruding portions is located in a lateral-groove extended region in which the connected portion is extended into the circumferential groove along the tyre axial direction.
    Type: Application
    Filed: May 4, 2020
    Publication date: December 3, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Hiroshi YAMAOKA, Koichi NAKAJIMA
  • Publication number: 20200376896
    Abstract: A tire comprises a tread portion having outboard and inboard tread edges and provided with three main grooves to axially divide the tread portion into four land regions including a widest outboard middle land region, wherein first inclined grooves (16) extend across the entire width of the outboard middle land region; second inclined grooves (17) extend from a crown main groove and are terminated within the outboard middle land region; fourth inclined grooves (19) are connected to the second inclined grooves (17) and to the first inclined grooves on an outboard shoulder main groove side; and an angle of the first inclined groove (16) and an angle of the second inclined groove (17) with respect to the tire circumferential direction are gradually increases from the crown main groove toward the outboard tread edge.
    Type: Application
    Filed: May 21, 2020
    Publication date: December 3, 2020
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Saki ARAKAWA, Hiroshi YAMAOKA, Kotaro TAHARA, Takafumi NOGUCHI
  • Patent number: 10821781
    Abstract: A tire includes a tread part having main grooves and lands demarcated by the main grooves. A crown land between a pair of crown main grooves includes first crown lug grooves extending from one crown groove to tire axial direction inner side and terminated within the crown land, second crown lug grooves extending from the other crown groove to the tire axial inner side and terminated within the crown land, and first crown sipes formed at tire circumferential direction positions and connecting the crown grooves, each first crown sipe includes a first side crown sipe piece extending from one crown groove to the tire axial inner side, a second side crown sipe piece not positioned on an extension line of the first side piece and extending from the other crown groove to the tire axial inner side, and a connecting crown sipe piece connecting the first and second sipe pieces.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: November 3, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Toshiki Horiguchi, Hiroshi Yamaoka, Yoshiaki Kanematsu
  • Patent number: 10675917
    Abstract: A tire comprises center blocks 4 comprising a first center lateral groove 5A and a second center closed sipe 6a opposed to each other in a tire axial direction, and a second center lateral groove 5B and a first center closed sipe 6b axially opposed to each other. Lengths thereof satisfy the followings: LA/LA0?½, LB/LB0?½, Lb/Lb0 in a range of from ? to ?, La/La0 in a range of from ? to ?, LA<La, (LA+La)<LA0, LB<Lb, and (LB+Lb)<LB0. The center blocks 4 comprise a high rigidity region extending continuously between penetrating sipes 3 and between a first imaginary line passing through terminating ends of the first center lateral groove and the first center closed sipe and a second imaginary line passing through terminating ends of the second center lateral groove and the second center closed sipe.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 9, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Aya Wakizono, Hiroshi Yamaoka
  • Patent number: D896165
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: September 15, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hiroshi Yamaoka
  • Patent number: D896166
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: September 15, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Hiroshi Yamaoka