Abstract:
The invention concerns a shock strut for a Mac Pherson wheel suspension comprising a shock absorber with a body (21) and a rod (22). A coil spring (24) is mounted on a lower spring retainer (23) integral with the shock absorber body (21). The first turn of the spring (24) of the MacPherson strut can be immobilized on and relative to the lower spring retainer (23) in various predetermined positions on the lower spring retainer (23).
Abstract:
A radial or partially radial tire has a ratio H/B of height to breadth less than one and a carcass reinforcement having a neutral fiber that follows, at least between the midheight of the respective sidewalls and the respective bead rings, the natural equilibrium curve of a single-ply radial carcass that is without a tread reinforcement and that is subjected to internal pressure, the curve being tangent to the bead rings and passing through the edges of the tread reinforcement and through points where the sidewalls have a maximum distance from each other. The wheel rim for mounting the tire is formed at each edge with a portion substantially parallel to the adjacent segment of the neutral fiber of the carcass reinforcement. This portion is connected to the adjoining bead seat by an S-shaped curve and is terminated on the outside by a curvature towards the axis of rotation of the tire.
Abstract:
An elastomer mixture is stretched to produce molecular orientation and wound onto a tire carcass in a series of turns to produce a tire tread. The tire is then vulcanized. The orientation, which survives the vulcanization, improves tread life and provides other benefits.
Abstract:
A radial tire is formed with the usual radial carcass and, in each sidewall, an additional reinforcement ply comprising cords arranged circumferentially of the tire and having a stiffness which generally increases with increasing distance from the axis of the tire from a minimum value at the edge adjacent to the bead wire to a maximum value at the other edge. In manufacturing the tire on a building drum, the cords selected to form the additional ply comprise a fragile core portion and a portion wound in a helix around the core and capable of elongation by rupture of the core and increase of the pitch of the helix. During the subsequent shaping, the cords of the additional ply automatically acquire the proper stiffness. This produces a tire providing improved road qualities and passenger comfort.
Abstract:
A crucible holding a liquid raw material such as molten steel is enclosed in a pressurization chamber. A nozzle in contact with the raw material projects the raw material into a cooling fluid to form a solid finished product. A gasket formed of a material which is gas-tight and compatible with the raw material is mounted for contact with the raw material and has a portion extending away therefrom. The raw material facilitates a hot seal between (a) the portion of the gasket in contact therewith and (b) the crucible and nozzle. A cold seal is formed between (a) the portion of the gasket extending away from the raw material and (b) the pressurization chamber.
Abstract:
A light-weight heavy-duty radial tire is formed with at least one carcass ply and at least two tread plies. The tensile strength T, expressed in kilograms, of the plies per centimeter of ply width is reduced to a value between 5 and 15 times the inner radius R, expressed in centimeters, of the tire in the median plane. The tire is of substantially reduced weight and is inflated to a pressure which is 20% to 30% less than the nominal inflation pressure for conventional tires of the same size bearing the same load.
Abstract:
Each bead of a radial tire has a single bead ring and a stiffener of steel cords arranged on the outside of the carcass. Each stiffener comprises at least two layers of crossed cords extending between a point located radially beyond the end of the carcass and a point located along the base of the bead.
Abstract:
A radial tire having a tread reinforcement including at least one folded tread ply includes in each fold a longitudinal cord forming at least one turn, the ends of the cord being overlapping and not connected. This facilitates the manufacturing process and provides an improved tire.
Abstract:
A radial tire for heavy road vehicles comprises a tread formed with wide circumferential zigzag grooves. The sides of the grooves form angles that are alternately salient and reentrant, and the zigzag of at least one of the grooves has its amplitude reduced by a lateral shift of the salient angles along at least one side of the groove. The shift is one of translation without rotation.
Abstract:
A valve for a tubeless tire comprises a rigid inner tube and an outer bushing of rubber. The rubber bushing is formed with an annular groove whereby the valve can be fastened in an aperture in a tire rim and a head which when the valve and a tire are mounted on the rim is positioned within the tire air chamber. The tube and bushing are configured with respect to each other in such a manner as to be normally spaced apart from each other adjacent to the annular groove, and the tube is formed with an extension penetrating into the head. The bushing has an inside diameter which is smaller at the head than at the annular groove. This construction prevents flexing and eventual destruction of the valve due to centrifugal force during high-speed travel.