Abstract:
A tire has its tire cavity filled with inexpensive lubricated light cellular particles and thereby avoids deformation and flattening of the tire upon loss of inflation pressure while maintaining vehicular control.
Abstract:
An information structure called a semaphore serves as a signalling mechanism in process synchronization. The semaphore is used to relate a process and an event which do not appear simultaneously. In accomplishing this, the semaphore is capable of storing the presence of events or resources waiting for processes or, alternatively, the presence of processes waiting for events or resources via a queue.
Abstract:
A heavy-duty pneumatic tire having a continuous radial carcass extending from one bead to the other and a tread reinforcement of slightly curved meridian profile restraining the carcass on the outer side thereof is characterized by at least one ply of oblique elastic cords which form an angle of at most 30.degree. with the radial cords of the carcass. This ply is arranged radially inward of the carcass, extends in the transverse direction of the tire over a width greater than the maximum width of the tread reinforcement, and has its two edges located beyond the edges of the tread reinforcement.
Abstract:
Synchronization of processes in a multiprogramming/multiprocessing system is provided by P and V instructions that are executed during execution of processes and operate on data structures known as semaphores which represent processes and events. A process that performs P instruction requests data. The P instruction addresses a semaphore data structure stored in memory. If the semaphore indicates that the data is available, the process continues execution of its next instruction; otherwise, the process is stopped and placed into a wait state until the data become available. A process that performs a V instruction, on the other hand, delivers data to another process. The V instruction addresses a semaphore to determine whether another process is awaiting the data and data are transferred to an awaiting process. If no process is available, the V instruction enables one of the processes in the wait state tied to the same addressed semaphore to be transferred to the ready state. P and V instructions are provided for semaphore structures without messages as well as semaphore structures with messages. Each of the P and V instructions includes test instructions that enable a process to continue in the running state in the event that the test P or V instruction is unable to be executed.
Abstract:
The tread of a giant pneumatic radial tire for use on heavy-duty road vehicles is divided by two wide circumferential grooves into three wide circumferential ribs. The wide ribs are substantially free of grooves therein interrupting their circumferential continuity and of wide circumferential grooves.
Abstract:
A pneumatic tire has a tread reinforcement formed of at least two plies of cords which are parallel in each ply and crisscross from one ply to the other, and a tread of which the surface intended to make contact with the ground is narrower than the tread reinforcement. The plies of the tread reinforcement have cords arranged at angles of an absolute value at most equal to 45.degree. with respect to the longitudinal direction of the tire, at least in the zones farthest from the equatorial plane of the tire. On at least one side of the equatorial plane, the tread reinforcement emerges laterally from the portion of the tread not in contact with the ground, by an axial length at most equal to 50 percent of the axial half-width of the tread, measured at the place where the tread reinforcement emerges from the tread. Rubber surrounds the emerging portion of the tread reinforcement on all sides, the surface of the rubber covering the radially outer face of the emerging portion, as seen in radial section, being located at a distance from the axis of rotation of the tire less than the distance from the axis of rotation to the surface of the tread intended to make contact with the ground.
Abstract:
The tread of a pneumatic tire is formed with relief blocks and with grooves that delimit the relief blocks and that open onto the edges of the tread. The relief blocks have sections parallel to their surface of contact with the ground which have central ellipses of inertia which are substantially circular and identical. At least some of the relief blocks are formed with a recess and with a straight connecting groove communicating with the recess and with the closest delimiting groove. The delimiting groove provide paths for the removal of water during travel of the tire on a wet road that extend obliquely forward in the direction of travel and facilitate discharge of water at the edges of the tread.
Abstract:
In a pneumatic tire wherein the aspect ratio is at most 0.6, the carcass reinforcement, seen in meridian section, follows its natural equilibrium profile between the zone of contact of the side walls with the tread reinforcement and the zone of contact of the side walls with the respective bead rings. The profile is tangent to the bead rings, and the bead rings themselves have a reinforced torsional rigidity.
Abstract:
Tire treads are made more resistant to "groove wear" without reducing adherence of the tread to wet or moist roads by providing specially located recesses and incisions in the critical zones formed by the salient angles and the reentrant angles of the broken-line circumferential ribs.