Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1998-09-04
2000-07-18
Till, Terrence R.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525044, B60S 102
Patent
active
060888725
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a wiper blade for a windshield wiper device for a vehicle, especially a motor vehicle, with a wiper squeegee, which is held and guided on a support system. The support system has a main support which is, at-least in sections, essentially U-shaped in cross-section, and can be hinged to a wiper arm so as to rotate around an axis running transversely to its longitudinal direction. At its opposite ends, a claw support is connected, either directly, or across an intermediate support, in the claws of this claw support, the headpiece of the wiper squeegee is mounted. The main support has a wind-directing device which uses the oncoming relative wind to amplify the down-force of the wiper squeegee against the windshield to be wiped. The wind-directing device is set up on the front side of the main support turned toward the relative wind and is manufactured in one piece with this main support.
A wiper blade of this type, from which the invention proceeds, is known, for example, from German Utility Patent DE 93.10 261.5 U1. A disadvantage of this known wiper blade is that the wind-directing device is shorter than the total length of the main support, so that it ends even before the hinge points for the claw supports or intermediate supports on the opposite end sections of the main support. The effective aerodynamic area of such a wind-directing device is too small to produce the greatest possible effect with regard to amplifying the down-force. In addition, this wind-directing device directly adjoins the lower edge of the front side wall (turned toward the relative wind) of the main support. The wind-directing device, looking at a cross-section of the main support thus forms an angle with the vertical front side wall pointing toward the automotive windshield. The aerodynamics of such a wiper blade with regard to an amplifying effect on the down-force of the wiper squeegee against the windshield to be wiped are thus not optimal.
The object of the invention is to improve a wiper blade of the type initially described, in order to achieve a greater aerodynamic down-force action.
SUMMARY OF THE INVENTION
According to the invention, the object is achieved by means of cantilevered, wing-like elongations of the wind-directing device, which protrude above the support in the longitudinal direction. In this way, the effective area of the wind-directing device is significantly enlarged. According to the embodiment of the wiper blade, the increase can amount to more than 50% in comparison to a known wiper blade. It should be clear that a wind-directing device enlarged in this way also has as a consequence a significantly greater amplification of the down-force of the wiper squeegee against the windshield to be wiped. Because the wind-directing device also now comes out of the front edge, turned toward the relative wind, of the main support spine, another improvement of the aerodynamic behavior of the wiper blade is achieved, and in this way an additional amplification of the down-force can be achieved.
Because the wind-directing device is manufactured in one piece with the main support of the support frame system, the main support, which holds and guides the supports of the support frame system that are inferior and subordinate to the main support, acquires an essentially greater mechanical rigidity than a main support without an integrated wind-directing device. This measure, which is of still greater significance, when the main support or the entire support frame system is manufactured from plastic, thus has an effect of a further improvement of the wiping performance.
By means of an advantageous embodiment of the invention, wherein the wing-like elongations of the wind-directing device extend in the longitudinal direction of the wiper blade beyond a large part of the outer claw supports and thus completely across any intermediate supports that are present on the support frame, a significant enlargement of the effective area of the wind-directing device is achieved, and f
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Egner-Walter Bruno
Schmid Eckhardt
Scholl Wolfgang
Aldag Andrew
ITT Manufacturing Enterprises Inc.
Lewis J. Gordon
Till Terrence R.
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