Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1999-03-25
2000-12-12
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525043, B60S 140, B60S 138
Patent
active
061580783
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The support bracket frame wiper blades (German Patent 15 05 397), which have been widely used for a long time in wiping devices for motor vehicle windshields, have a great structural height, which under the flow conditions existing in front of the vehicle window, especially at a high vehicle speed, promotes the tendency of the wiper blade to lift away from the window. At the very least, this reduces the prescribed contact pressure of the wiper blade on the window so greatly that the wiping quality suffers.
In a known wiper blade (German Patent 10 28 896) that is part of a wiping device, the support element for the entire field swept by the wiper blade is intended to assure the most uniform possible distribution of the wiper blade contact pressure against the window that originates at the wiper arm. By a suitable curvature of the unstressed support element--that is, when the wiper blade is not contacting the window--the ends of the wiper strip, pressed completely onto the window during wiper blade operation, are stressed by the then-stressed support element toward the window, even if the radii of curvature of spherically curved vehicle windows change for every wiper blade position. The curvature of the wiper blade must accordingly be somewhat greater than the greatest curvature measured in the field to be wiped in the window in question. Thus the support element replaces the complicated support bracket construction with two spring rails, disposed in the wiper strip, of the kind used in the conventional wiper blades discussed above. Although this does allow reducing the structural height of the wiper blade, nevertheless the attainable improvement in wiping quality at high vehicle speeds still does not meet the stringent demands made in this respect by some customers. The wiper arm, located above the wiper blade, has proved to be advantageous because it lessens the advantages of the low-height wiper blade.
SUMMARY OF THE INVENTION
In accordance with the present invention, a wiper blade is disposed next to a wiper arm, viewed vertically to the window and is pivotably connected to the wiper arm via the connection device, and a pivot pin is disposed on the wiper blade, while its bearing receptacle is located on the wiper arm.
In the wiping device of the invention the wiper arm belonging to the wiping device is located next to the wiper blade, so that the wiper arm can have hardly any further influence on the structural height of the wiping device and thus on the high-speed performance of the wiper blade in operation. The pivotable connection allows proper contact of the wiper blade or wiper strip with the surface of the window in every wiper blade position, even at extremely high vehicle speeds.
The pivotable connection between the wiper arm and the wiper blade is attained in a simple, operationally safe and reliable way by providing that one of the two device halves has a pivot pin, and the other of the two device halves is provided with a bearing receptacle associated with the pivot pin.
Since the pivot pin is disposed on the wiper blade, and its bearing receptacle is located on the wiper arm, the device half, which as a rule can be made more economically, is then disposed on the wiper blade, which can be considered a wearing part. Without regard to this, however, it may also be advantageous for special reasons to dispose the pivot pin on the wiper arm and the bearing receptacle on the wiper blade.
So that the connection between the wiper arm and the wiper blade cannot be undone, especially during wiper operation in the direction of the pivot axis of the pivotable connection, the two device halves are provided with means for axially securing the pivot pin in its bearing receptacle. The inside faces of the legs of the U, facing toward one another, and the side faces of the respective device halves facing one another also form excellent guide means, which given careful dimensional adaptation assure quiet operation of the wiping device.
A stable, compact design of the device half h
REFERENCES:
patent: 3147506 (1964-09-01), Williams
patent: 3845519 (1974-11-01), Quinlan et al.
patent: 4318200 (1982-03-01), Bauer et al.
patent: 4343064 (1982-08-01), Van Den Berg et al.
patent: 5065474 (1991-11-01), Charng
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
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