Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1996-08-14
1998-04-28
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525044, B60S 138
Patent
active
057429731
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a wiping apparatus in accordance with the species of the main claim. A wiping apparatus is already known (DE-OS 40 32 428), wherein detent hooks are disposed on the free ends of the U-shaped legs of the hinge element, which extend behind the free end of the U-shaped leg of the upper bow, so that the hinge element is fixedly connected with the upper bow. The upper bow is subsequently pressed over the lower bow, wherein the hinge protrusions must be inserted over the lower bow, which is resilient over its width, until the hinge protrusions reach the seating recesses of the lower bow. But there is the danger that the lower bow becomes permanently deformed in the course of this, for which reason the lower bow must again be pushed apart for a secure seating of the two bows against each other.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a wiper apparatus which avoids the disadvantages of the prior art.
The wiping apparatus in accordance with the invention has the advantage that the detent element alone is elastically deflected in the course of the assembly of the two bows on each other. The deformation of the bows is avoided by this and adjustment work is omitted.
BRIEF DESCRIPTION OF THE DRAWINGS
An exemplary embodiment of the invention is represented in the drawings and explained in detail in the following description. FIG. 1 shows the support frame, which is part of a wiper blade of a wiping apparatus for windshields of motor vehicles, in an exploded view, FIG. 2 shows a section through the frame elements along the line II--II in FIG. 2 in an enlarged view, and FIG. 3 shows the support frame elements of FIG. 2 in the assembled state, represented enlarged.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
An upper bow 12, hereinafter identified as the main bow, and two lower bows 14 and 16, hereinafter identified as claw bows, are parts of a support frame 10 represented in FIG. 1. On their ends, the two claw bows 14 and 16 have claw-like protrusions 18, which are used for grasping a wiper strip, not shown, resting on the windshield to be wiped. The claw bows 14 and 16 are hinged in the manner of a balance arm at the two ends of the main bow 12 and essentially have a U-shaped cross section (FIG. 2). The main bow 12 thus has a U-shaped base 20 which makes a transition into the two U-shaped legs 22 which are parallel with each other. The U-shaped base 24 of the claw bows 14 and 16 is also provided with U-shaped legs 26. The two U-shaped legs 26 of the claw bows 14 and 16 furthermore have respectively one seating recess 28 in their center area. The seating recesses 28 of the U-shaped legs are aligned with each other.
The support bow frame 10 has hinge elements 40, preferably made of an elastically deformable plastic material and also made U-shaped in cross section (FIG. 2), for the hinged fastening of the claw bows 14 and 16 on the two ends 30 and 32 of the main bow 12. In this case a hinge element 40 is associated with each end 30, 32 of the main bow 12. Since the two hinge element 40 are formed in exactly the same way and are also mounted in the same way, only the embodiment of the hinge element 40 associated with the end 30 will be explained in what follows. The U-shaped hinge element 40 has a U-shaped base 42, on which the two U-shaped legs 44 are connected. Each one of the two U-shaped legs 44 is provided with a pin-like hinge protrusion 46, whose diameters are matched to the diameters of the seating recesses 28 in the U-shaped legs 26 of the claw bow 14. In addition, strip-like, elastically deflectable detent elements 48 extending in the longitudinal direction of the elongated support frame 10, are disposed in the transition area of the U-shaped legs 44 and the U-shaped base 42 on the hinge element 40, to which slit-like openings 50 in the main bow 12 are assigned. The slit-like openings 50 are located in the transition area between the U-shaped base 20 and the U-shaped legs 22. As can be seen from FIG. 2 in p
REFERENCES:
patent: 4418441 (1983-12-01), van den Berg
patent: 4896987 (1990-01-01), Pethers
patent: 5073060 (1991-12-01), Pethers
patent: 5090086 (1992-02-01), Journee et al.
patent: 5183352 (1993-02-01), Carpenter
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
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