Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1998-02-25
2000-05-09
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
B60S 138
Patent
active
060585552
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a wiper blade for motor vehicle windshield wiper systems.
In systems for wiping especially the windshield of motor vehicles, certain difficulties arise at high travel speeds, because then the contact pressure of the wiper blade against the window is reduced, with increasing travel speed, by the relative wind striking the wiper blade, and as a result the wiping quality, at least in certain regions of the window, no longer meets the demands made of it. At lower travel speeds, on the other hand, an increased contact pressure would lead to undesirably high and disadvantageous friction between the wiper strip of the wiper blade and the window.
In a known wiper system (European Patent Disclosure EP 0 398 376 B1), a wind deflector strip has been screwed to the wiper blade, extending downward toward the window from the load bearing frame--that is, disposed in suspended fashion; this wind deflector strip, with a wind baffle oriented toward the relative wind, covers substantial portions of the wiper blade. The relative wind striking the oblique wind baffle and/or the negative pressure that builds up behind the wind deflector strip in the region of the wiper blade, are intended especially at high travel speeds to increase the contact pressure of the wiper blade against the window. However, such a suspended disposition of the wind deflector strip, in certain cases--for instance given a special pivotable connection of the wiper blade to a drive wiper arm or where there are relatively short radii of curvature in spherically curved windows--can be problematic. Difficulties can also arise if the wiper system is provided with a device that relieves the wiper blade, in its parking position, from the contact pressure that is required during operation. In such cases, an upright disposition of the wind deflector strip can prove expedient.
In a known wiper system (German Utility Model G 78 26 802.7), the wind deflector strip is mounted on the top of the wiper arm that guides the wiper blade.
SUMMARY OF THE INVENTION
In the inventive wiper blade in keeping with these objects, one feature of present invention resides, briefly stated, in a wiper blade, in which the wind deflector strip is mountable suspended from the load bearing frame or standing upright on the load bearing frame and in each of the two mounting positions has a wind baffle oriented toward the relative wind. However, the wind deflector strip--in adaptation to particular given conditions--must be desired either in suspended or upright fashion on the load bearing frame of the wiper blade. For both mounting possibilities of the wind deflector strip, there is one wind baffle each oriented toward the relative wind, one longitudinal edge of which is located closer to the window than the other wind baffle longitudinal edge, which because of the necessary oblique position is behind the first longitudinal edge in terms of the approach direction of the relative wind.
This makes for simplifications and economies in A production of the wiper blade, as well as easier stockkeeping.
It is especially advantageous if the same fastening device can be used for both mounting positions. Simple mounting of the wind deflector strip to the load bearing frame, which can even be done by the final user, is obtained if furthermore the fastening device has detent means on the wind deflector strip, with which counterpart detent means and of the load bearing frame are associated, because thus no special tools are needed to mount it on the load bearing frame, and moreover the expenditure of time for the mounting is very slight.
If the wiper blade, whose load bearing frame has a metal bracket of U-shaped cross section extending in the direction of the wiper strip, it is provided in a further feature of the invention that the counterpart detent means are embodied on the legs of the U of the load bearing bracket, and the base of the U that joins the two legs of the U is removed, in at least a portion of the load bearing bracket, in ord
REFERENCES:
patent: 4590638 (1986-05-01), Beneteau
patent: 5086534 (1992-02-01), Journee
patent: 5093954 (1992-03-01), Kuzuno
patent: 5168596 (1992-12-01), Maubray
Schoeters Ann
Vanroy Jan
Verelst Hubert
Westermann Klaus-Juergen
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
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