Wiper bearing

Details Wiper bearing Wiper bearing

1999-09-03

2001-08-28

Fenstermacher, David (Department: 3682)

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

C015S250340

Reexamination Certificate

active

06279409

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention is based on a wiper bearing. Known wiper bearings of this generic type have a shaft, which is seated in a bearing structurally connected to the frame and which transmits a pendulum motion, generated by an electric motor drive mechanism via a crank drive, to a wiper arm and thus to a wiper blade resting on a window. Since particularly in late-model cars the windshields often have radii of curvature that vary considerably over the pendulum range of the wiper, an optimal orientation of the wiper blade to the window surface, which to assure a dragging motion should be as vertical to the window as possible, is not always attainable. It has therefore already been proposed that the axis of the wiper shaft be oriented at a specified angle relative to the window surface. As a result, a vertical orientation of the wiper blade is attained at least for a middle region. The orientation of the wiper blade over the full wiping region, however, still remains unsatisfactory.
SUMMARY OF THE INVENTION
In keeping with these objects, one feature of present invention resides, briefly stated, in a wiper bearing which is a further improvement of the existing wiper bearings.
In keeping with these objects, one feature of present invention resides, briefly stated, in that the bearing shell concentrically grips a region of the shaft and forms a first axis, which forms an angle with a second axis extending through a region having a receptacle of the shaft.
The wiper bearing with the characteristics of the present invention has the advantage over the prior art that the orientation of the wiper blade to the window surface is made possible over a much larger area of the wiper-swept field. For instance, by suitable orientation of the first or second axis, optimal conditions are possible at both turning points, or at one turning point and in a parking position, or in a region in the vicinity of the turning points.
Further advantageous features are possible by means of the characteristics of the dependent claims. By means of a kinked, curved or cranked course of the shaft, for instance, adaptations can be made to conditions in the region of transition from the windshield to the hood of the car. If the wiper shaft axis that passes through the receptacle of the wiper arm forms an angle with the second axis, still another option for optimization is presented.


REFERENCES:
patent: 3808629 (1974-05-01), Druseikis
patent: 5186064 (1993-02-01), Matsumoto et al.
patent: 5890256 (1999-04-01), Eustache
patent: 40 07 940 C1 (1991-08-01), None
patent: 2 646 643 (1990-11-01), None
patent: 2 729 351 (1996-07-01), None

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