WHEEL

Abstract: A wheel (1, 2), especially for use in automotive vehicles, comprising a rim (14), a disc (15) that is external and coaxial with the rim (14), the disc being provided with consecutive spokes, a vent window (17) being provided between every two consecutive spokes, the rim (14) being provided with a bore (13, 13') for placing the valve (12) of filling and controlling the pressure of the tire, the access to the valve (12), when mounted in the bore (13, 13'), being substantially through the vent window (17). The present invention brings about the economy of a step of producing the wheel (1, 2), enables it to have greater inherent balancing and enables one to use shorter valves (12), which present their beak (16) position in a more convenient way, so that the end user will have more in altering the calibration of the tire.

Description: Title: "WHEEL" The present invention relates to a wheel provided with a new arrangement of bore for a calibration valve of a tire. Description of the Prior art Conventional wheels of stamped steel for use in automotive vehicles are made up of a substantially cylindrical rim, on which the tire is fixed and a disc stamped in carbon steel, arc-welded, preferably in four different regions substantially perpendicular to each other. However, the wheels in question have a number of drawbacks that make their use little suitable for certain types of vehicles. Considering these drawbacks, the present applicant has developed an integrated stamped wheel comprising a rim and a disc having at least one spoke with a cross-section substantially in the form of an open profile and being associated with the rim, so that the opening of the profile of the spoke will be facing the face of the wheel that is associable with the hub of the wheel of the vehicle. This wheel is described in patent application PI 9701349-8. However, in the wheel in question the valve for filling and controlling the pressure of the tire would remain in the same position in which it was situated in the conventional wheels of stamped steel. This positioning created a drawback, requiring an additional operation for manufacturing the wheel, this additional operation creating a recess and/or a bore at a given point of the outer portion of the disc of this wheel. The recess and/or bore further caused another drawback, which was the unbalancing of the wheel due to the withdrawal of material in this region. In addition, in order to position the beak of the valve correctly and to bring about an easy calibration of the tire, the valve body had a long length. Objectives of the Invention The present invention has the objective of providing a wheel, especially for use in automotive vehicles in which the valve used for filling and controlling the pressure of the tire is positioned so as to avoid the need for an operation for creating a recess and/or a bore at a certain point of the outer portion of the disc of the wheel. Brief Description of the Invention The objective of the present invention is achieved by means of a wheel, especially for use in automotive vehicles, which comprises a rim, an outer disc coaxial with the rim, the disc being provided with consecutive spokes, a vent window being provided between every two consecutive spokes, the rim being provided with a bore for placing a valve for filling and controlling the pressure of the tire, the access to the valve, when it is mounted in the bore, being provided substantially through the vent window. Optionally, a wheel is provided in which the longitudinal axis of the bore for placing the valve extends through the vent window. Brief Description of the Drawings The present invention will now be described in greater detail with reference to an embodiment represented in the drawings. - Figure 1 is a side cross-section view of the wheel of the prior art; - Figure 2 is a front view of the wheel of the prior art; - Figure 3 is a side cross-section view of a first embodiment of the new positioning of the valve for controlling tire pressure of the present invention; - Figure 4 is a side cross-section view of a second embodiment of the of the new positioning of the valve for controlling tire pressure of the present invention; and - Figure 5 is a front view of the wheels with the new positioning of the valve of the present invention. Detailed Description of the Figures According to figures 3 -5, the present invention has two preferred embodiments applied to wheels 1, 2. The wheels 1, 2 are especially usable in automotive vehicles and comprise a substantially cylindrical rim 14 and a disc 15 that is external and coaxial with the rim 14, made of stamped steel and having five vent windows 17 for the brake system ventilation. One can clearly see, from figures 1 and 2 referring to the wheel 100 of the prior art, which is composed of a disc 150 and a rim 140, that the region 110 of the wheel 100, located at a substantially external attachment portion of the disc 150, has a recess and/or a bore for placing the valve 120 of filling and controlling the pressure of the tire. The valve is fixed to the rim 140 in a bore for placing the valve 130. However, due the inclination of the longitudinal axis of the bore 130, one makes a recess and/or bore at a determined point of the outer portion of the disc 150, in order to bring about the correct positioning of the beak 121 of the valve 120 on the disc 150. This recess and/or bore is made in an additional step to be carried out with the disc 150 while manufacturing the wheel 100. This additional step of manufacture renders the production cost of the wheel 100 high, besides prolonging the manufacture time. To make the situation still worse, the recess and/or bore causes unbalancing of the wheel 100 due to the removal of material in an asymmetrical way with respect to its mass center. This wheel is described in detail in patent application PI 9701349-8, the owner of which is the applicant itself. In the wheel 1, 2 shown in figures 3 - 5, the valve 12 for filling and controlling the pressure of the tire is fixed to the rim 14 in a bore for placing the valve 13, 13', the direction of the longitudinal axis forms an angle α with the plane defined by the central portion 20 of the disc 15. The projection of the central point (not shown) of the bore 13, 13' as far as the middle portion of the outer edge 23 of one of the windows 17 forms an angle β. Unlike the wheel 100 of the prior art, the opening value of the angle α is substantially lower than the opening value of the angle β, enabling the valve 12 to be installed without the need for a recess and/or bore, so that the wheel 1 , 2 can accommodate its beak 16. Therefore, access to the beak 16 of the valve 12, when mounted in the bore 13, 13', is provided substantially through the vent window 17. The beak 16 is located in a region 11 at a substantially external portion of the disc 15, the region 11 being substantially adjacent to said window 17. In the wheel 1 , relating to a first embodiment, the longitudinal axis of the bore 13 for placing the valve 12 extends through the vent window 17, presenting a little angle a. The present invention brings about the economy of a step of production of the wheel 1, 2, since a recess and/or bore in the disc 15 is not required for the valve 12 to be correctly accommodated. In addition, since no removal of material in an asymmetric way with respect to the mass center of the wheel 1 , 2 is required, it presents better inherent balancing, having better efficiency of use and an important commercial advantage. Also, this configuration enable one to use shorter valves 12, which have their beaks 16 positioned in a more convenient way, so that the end user will have more ease in altering the calibration of the tire. Although the wheel 1 , 2 of the detailed description has five vent windows 17, it is evident that the present invention may by applied to a wheel with a different number of windows. A preferred embodiment having been described, one should understand that the scope of the present invention embraces other possible variations and is limited only by the contents of the accompanying claims, the possible equivalents being included therein.

Claims: CLAIMS 1. A wheel (1 , 2), especially for use in automotive vehicles, comprising a rim (14), a disc (15) that is external and coaxial with the rim (14), the disc being provided with consecutive spokes, a vent window (17) being provided between every two consecutive spokes, the wheel (1, 2) being characterized in that the rim (14) is provided with a bore (13, 13') for placing the valve (12) of filling and controlling the pressure of the tire, an access to the valve (12), when mounted in the bore (13, 13'), being provided substantially through the vent window (17). 2. A wheel according to claim 1 , characterized in that the longitudinal axis of the bore (13) for placing the valve (12) extends through the vent window (17). 3. A wheel according to claim 1 or 2, characterized in that the vent windows (17) are substantially equal.

Inventors: MARCAO MARCELINO, MARCAO, MARCELINO
Applicants: MARCAO MARCELINO, MERITOR DO BRASIL LTDA, MARCAO, MARCELINO, MERITOR DO BRASIL LTDA.
Application year: 2001
Main classification: B60B
IPC codes: B60B3, B60B21, B60C29