Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1999-06-10
2000-09-12
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
B60S 138
Patent
active
061158763
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is directed to a wiper installation, especially for windows of motor vehicles.
Wiper installations of the type mentioned above are known. As a rule, they have at least one wiper rubber which maintains contact with a window to be wiped and is movable back and forth between two reversal positions. For this purpose, the wiper rubber is fastened to a bracket or clip which is connected with a drivable wiper arm. The clip has at least one claw, generally a plurality of claws which are arranged at a distance from one another along the longitudinal extension of the wiper rubber whose head is held by the claws. The head of the wiper rubber has corresponding recesses in which the clip can engage.
It is known from DE 975 208 to dimension the head of the wiper rubber so that, considered in cross section, it is smaller than a space enclosed by the clip. In this way, an articulation or hinge is formed between the clip and the wiper rubber, wherein a hinge axis runs along the longitudinal extension of the wiper rubber. This arrangement makes it possible to deflect the wiper rubber during its movement across the window due to a frictional force acting at the wiper rubber, resulting in a tilted position between the wiper rubber, in particular a lip contacting the surface of the window, and the window. This results in a more uniform wiping pattern. In particular, noise generated by the wiper rubber guided across the window is prevented in this way. Corresponding to the back-and-forth movement between the two reversal points of the wiper rubber, a corresponding deflection of the wiper rubber is carried out in the other respective direction opposite to the wiping direction. The degree of deflection of the wiper rubber is determined by the play of the wiper blade head inside the space enclosed by the clip. A disadvantage in the known arrangement consists in that noise develops as a result of the head knocking against the clip when the wiper rubber flips over, which happens impulsively due to a sudden change in the wiping direction in exactly the opposite direction.
SUMMARY OF THE INVENTION
The wiper installation according to the invention offers the advantage over the prior art that a development of noise of the type mentioned above is prevented. Owing to the fact that at least one damping element for damping the rotating movement of the wiper rubber is associated with a hinge formed between the wiper rubber and the clip, it is advantageously possible to dampen the impulsive flipping over of the wiper rubber at least in the area of the head enclosed by the clip, so that the tilting movement is braked in this area against the force of the damping element. In particular, when the entire wiper rubber is formed of elastic material, the lip area contacting the window to be wiped can be flipped over impulsively without this rotational movement being transmitted directly to the head of the wiper rubber. Due to the arrangement of the damping element, a tilting movement of the head is carried out after a delay and with a decelerated impulsive force, so that the head is prevented from knocking against the clip enclosing it and the noise generated in this way is accordingly prevented.
In a preferred construction of the invention, it is provided that the damping element is constructed in one piece with the wiper rubber, especially with the head of the wiper rubber. In this way, it is easily possible to construct the wiper rubbers with an integral damping element by means of known methods, for example, extrusion of elastic materials. This also reduces expenditure on the construction of damping elements to a negligible amount.
In a further preferred construction of the invention, it is provided that at least one damping element maintains constant contact with the clip enclosing the head of the wiper rubber. In this way, it is ensured that a damping of the tilting movement of the wiper rubber, especially in the area of its head, is initiated immediately as soon as the wiper rubber flips over in t
REFERENCES:
patent: 2632907 (1953-03-01), Anderson
patent: 2792585 (1957-05-01), Scinta
patent: 3048872 (1962-08-01), Kerrigan
patent: 5462707 (1995-10-01), Nagy
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
LandOfFree
Wiper system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wiper system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wiper system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-84991