PIRELLI TYRES S.p.A.
|PIRELLI TYRES S.p.A. Patent applications|
|Patent application number||Title||Published|
|20120118456||PAIR OF MOTOR VEHICLE TYRES - A pair of motor vehicle tyres includes a front tyre and a rear tyre to be mounted respectively on a front wheel and a rear wheel of a two-wheeled vehicle, each tyre of the pair having a tread band extending around an axis of rotation. The tread band of the front tyre includes a central annular portion straddling an equatorial plane and two annular shoulder portions disposed on axially opposite sides of the central annular portion. The central annular portion includes at least a pair of first grooves extending substantially longitudinally on opposite sides of the equatorial plane in such a way as to form a concavity directed toward the equatorial plane. Each shoulder portion includes a plurality of second grooves isolated from the first grooves and extending substantially transversally so as to form an average inclination with the equatorial plane greater than 90°. The tread band of the rear tyre includes instead a module which is replicated along a direction of circumferential development of the tyre, the module including: at least one first pair of first grooves inclined in opposite directions with respect to the equatorial plane of the tyre; each first groove of the first pair extending along a portion of the tread band between the equatorial plane and a respective shoulder and forming an average inclination less than 60° with the equatorial plane.||05-17-2012|
|20110108175||RAIN TYRE - A tyre includes a tread band provided with a tread pattern including a first and a second portion of tread pattern, repeated just the same along the circumferential extent of the tyre, forming respectively a short pitch module and a long pitch module of the tread pattern, wherein the modules include a respective first transverse groove in which, starting from an axially outer first end thereof toward an opposed axially inner second end thereof, an initial section and a section of enlarged cross-section are formed, the latter being blind, at least on its axially inner side, when in the footprint area. The initial section and the section of enlarged cross-section have, respectively, a first width and a second width, and the ratio between the second width and the first width of a first transverse groove belonging to a short pitch module is greater than the ratio between the second width and the first width of a first transverse groove belonging to a long pitch module.||05-12-2011|
|20100186872||METHOD FOR LAYING DOWN AT LEAST AN ELASTIC ELEMENT IN A PROCESS FOR PRODUCING TYRES FOR VEHICLES, PROCESS FOR PRODUCING TYRES FOR VEHICLES AND APPARATUS FOR CARRYING OUT SAID LAYING DOWN METHOD - A method of laying down at least one elastic element in a process for producing tyres for vehicles includes the following steps: determining a first parameter representative of a laying speed at which at least one elastic element is laid down around a tyre forming drum; determining a second parameter representative of a percent elongation to be applied to the elastic element; adjusting, as a function of the first and second parameters, a rotation speed of a control roller positioned upstream of the forming drum and having a radially external surface at least partly in engagement with the elastic element for controlling the laying profile of the at least one elastic element. A process for producing tyres for vehicles and an apparatus for carrying out the laying method are also described.||07-29-2010|