Patents by Inventor Stefano Ducci
Stefano Ducci 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: 9358841Abstract: A winter tyre with improved traction on snow surfaces; the tyre has a tread with a raised pattern defined by a number of longitudinal and transverse grooves which form at least one longitudinal row of blocks projecting radially from a base surface of the tread. Each block has two longitudinal lateral surfaces bounding two corresponding longitudinal grooves, and two transverse lateral surfaces bounding two corresponding transverse grooves. At least one of the blocks has lateral channels, each of which is formed on the lateral surface of a corresponding block, extends from the base surface of the tread to a top surface of the block, and is designed to impede radial spin-out of snow trapped inside the lateral channel.Type: GrantFiled: April 23, 2015Date of Patent: June 7, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Stefano Ducci, Antonio Tirone, Alessandro Martini
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Patent number: 9211765Abstract: A winter tire with improved traction on snow surfaces; the tire has a tread with a raised pattern defined by a number of longitudinal and transverse grooves which form at least one longitudinal row of blocks projecting radially from a base surface of the tread. Each block has two longitudinal lateral surfaces bounding two corresponding longitudinal grooves, and two transverse lateral surfaces bounding two corresponding transverse grooves. At least one of the blocks has lateral channels, each of which is formed on the lateral surface of a corresponding block, extends from the base surface of the tread to a top surface of the block, and is designed to impede radial spin-out of snow trapped inside the lateral channel.Type: GrantFiled: September 21, 2010Date of Patent: December 15, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Stefano Ducci, Antonio Tirone, Alessandro Martini
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Publication number: 20150224827Abstract: A winter tyre with improved traction on snow surfaces; the tyre has a tread with a raised pattern defined by a number of longitudinal and transverse grooves which form at least one longitudinal row of blocks projecting radially from a base surface of the tread. Each block has two longitudinal lateral surfaces bounding two corresponding longitudinal grooves, and two transverse lateral surfaces bounding two corresponding transverse grooves. At least one of the blocks has lateral channels, each of which is formed on the lateral surface of a corresponding block, extends from the base surface of the tread to a top surface of the block, and is designed to impede radial spin-out of snow trapped inside the lateral channel.Type: ApplicationFiled: April 23, 2015Publication date: August 13, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Stefano DUCCI, Antonio TIRONE, Alessandro MARTINI
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Publication number: 20120273105Abstract: A winter tyre with improved traction on snow surfaces; the tyre has a tread with a raised pattern defined by a number of longitudinal and transverse grooves which form at least one longitudinal row of blocks projecting radially from a base surface of the tread. Each block has two longitudinal lateral surfaces bounding two corresponding longitudinal grooves, and two transverse lateral surfaces bounding two corresponding transverse grooves. At least one of the blocks has lateral channels, each of which is formed on the lateral surface of a corresponding block, extends from the base surface of the tread to a top surface of the block, and is designed to impede radial spin-out of snow trapped inside the lateral channel.Type: ApplicationFiled: September 21, 2010Publication date: November 1, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Stefano Ducci, Antonio Tirone, Alessandro Martini
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Patent number: 8245744Abstract: A tire, the tread of which has an equatorial plane and at least one raised element, which has a longitudinal axis and respective lateral edges substantially parallel to the equatorial plane, and sipes crosswise to the longitudinal axis; and wherein at least one sipe is Z-shaped and defined by three consecutive portions, a first and a third portion of which are end portions originating at respective lateral edges, and a second portion of which is an intermediate portion connected to the first portion at a first point, which is located a first distance from the lateral edge from which the relevant first portion originates, and to the third portion at a second point located a second distance from the lateral edge from which the relevant first portion originates; the intermediate portion sloping with respect to the longitudinal axis, and the second distance being less than the first distance.Type: GrantFiled: February 26, 2007Date of Patent: August 21, 2012Assignee: Bridgestone CorporationInventor: Stefano Ducci
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Publication number: 20090218016Abstract: A tyre (1), the tread of which has an equatorial plane (5) and at least one raised element (4, 7), which has a longitudinal axis (4a) and respective lateral edges (4b, 4c) substantially parallel to the equatorial plane (5), and sipes (11a, 11b) crosswise to the longitudinal axis (4a); and wherein at least one sipe (11a; 11b) is Z-shaped and defined by three consecutive portions (14, 15, 16), a first and a third portion (14, 16) of which are end portions originating at respective lateral edges (4b, 4c; 4c, 4b), and a second portion (15) of which is an intermediate portion connected to the first portion (14) at a first point (17),which is located a first distance (D1) from the lateral edge (4b; 4c) from which the relevant firs portion (14) originates, and to the third portion (16) at a second point (18) located a second distance (D2) from the lateral edge (4b; 4c) from which the relevant firs portion (14) originates; the intermediate portion sloping with respect to the longitudinal axis (4a), and the second disType: ApplicationFiled: February 26, 2007Publication date: September 3, 2009Applicant: BRIDGESTONE CORPORATIONInventor: Stefano Ducci
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Patent number: 6523585Abstract: An antistatic tire having a tread made from a first mix (MP1) and having two annular shoulders and a peripheral rolling surface, two opposite annular portions of the rolling surface being defined by outer annular surfaces of the shoulders. Each shoulder is made from a second mix (MPC), which is electrically conducting, and which, under low strain, has substantially the same rigidity as the first mix (MP1), and, under high strain, has a greater rigidity than the first mix (MP1). In a second embodiment, an electrically conducting element is inserted inside the tread. The conducting element and the shoulders both being made of an electrically conducting third mix, which, under low strain and in the cured state, has the same mechanical characteristics as the first mix in the cured state, and, under high strain, has the same mechanical characteristics as the second mix in the cured state.Type: GrantFiled: June 28, 2000Date of Patent: February 25, 2003Assignee: Bridgestone CorporationInventors: Stefano Ducci, Yochiro Kondo, Paolo Straffi, Jose Silicani
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Patent number: 6183581Abstract: An antistatic tire and relative production method, whereby a portion of a tread made of an electrically insulating mix is hollowed out and filled with a cement (C) in the form of a carbon black mix in a volatile liquid; the carbon black mix being left inside the hollow portion when the volatile liquid evaporates, and defining inside the tread at least one conducting body communicating with a rolling surface of the tire.Type: GrantFiled: March 17, 1998Date of Patent: February 6, 2001Assignee: Bridgestone CorporationnInventors: Stefano Ducci, Yochiro Kondo, Paolo Straffi, José Silicani