Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1997-12-01
1999-10-26
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525032, 15250451, B60S 138
Patent
active
059705698
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a wiper blade. In a known wiper blade of this species (DE 26 14 457 A1) distribution, as even as possible, of the wiper blade contact pressure on the windshield surface to be wiped is intended to be achieved by means of varying thickness of the support elements, wherein the center section of the support element is thicker and thus more rigid than the thinner and thus more flexible end section of the support element. Such a support element embodiment at best may be somewhat economically feasible when the support element is made of plastic, however, even in that case each support element has to be individually pressed or injection-molded in a mold.
SUMMARY OF THE INVENTION
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a wiper blade in which the longitudinal runners of a support element have an even thickness over their entire longitudinal width, the width of the support element is reduced from its center in the direction of its two ends and the connecting device for a power wiper arm is directly connected to the longitudinal runners.
When the longitudinal runners of the support element or respectively the entire support element are of the same thickness over their entire longitudinal extension, these--and thus the entire support element--can be extruded particularly cost-effectively if these components are to be made of plastic. Reducing the width of the support element is possible in a simple manner by cutting the outer longitudinal side edges accordingly. Another advantage results in that the support element can also be cut from appropriately dimensioned spring steel.
In case the longitudinal extension of the support element exceeds a certain value, causing a certain weakness of the longitudinal runners or respectively of the support element, the necessary stability of the support element can be assured, in that between the two cross braces of the support element arranged at the ends of the longitudinal runners, stabilizing devices acting on the two longitudinal runners are disposed.
Depending on the choice of material for the clips, it may be practical if these are connected frictionally or interlockingly with the longitudinal runners. A frictional and interlocking connection is of course also possible.
The stabilizing devices embodied as clips are suitably fitted with claw attachments, which pass around the longitudinal edges facing away from each other of the longitudinal runners of the support elements.
An additional simplification of the wiper blade results, if in a further embodiment of the invention at least one stabilizing clip is fitted with a connecting device for the powered wiper arm.
If the support element is made of spring steel, a particularly low constructed wiper blade can be achieved, which has good properties regarding the flow conditions present in front of the windshield of the inflowing air.
BRIEF DESCRIPTION OF THE DRAWINGS
Shown are in FIG. 1 a lateral view of a wiper blade in accordance with the invention, in FIG. 2 a section of the wiper blade along the line II--II, with a center section of the wiper blade shown in enlarged perspective, in FIG. 3 the cut section through the wiper blade along the line III--III in FIG. 1, and in FIG. 4 a perspective representation, not to scale, of a support element as a part of the wiper blade.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A wiper blade 10 represented in FIG. 1 has an elastic support element 12 (FIG. 4), made of spring steel in the exemplary embodiment, for a wiper strip 14 made of rubber-like material. For simplification the elongated wiper blade 10 in FIG. 1 is drawn in a position in which it would hardly be in actuality, because the elastic support element is preloaded in such a way, that the wiper strip 14 is curved in a manner indicated by way of a dash-dotted line 16 in FIG. 1. The degree of this curvature is higher than the maximal curvature of the windshield to be wipe
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Kotlarski Thomas
Merkel Wilfried
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
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