Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1996-09-16
1998-10-13
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
403153, 1525044, B60S 138
Patent
active
058193618
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is based on a known wiper blade (U.S. Pat. No. 4,795,288), wherein the hinge bolt has an elastically compressible spindle-shaped thickening in its center section which allows insertion of the hinge bolt into its seated position. The two widened ends of the thickening are arranged and designed in such a way that they jam in the openings of the lower bow and cause the fixed seating between the bolt and the lower bow. If the allowed unavoidable tolerances of the openings are in unfavorable positions, it can occur that the ends of the thickenings project through the lower bow and also hold the upper bow in place, so that the mobility in the support bow joint is at least hampered.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a wiper blade for a window washing apparatus, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated in a wiper blade for windshield wiper systems of motor vehicles, which wiper blade has in accordance with the invention the securing means end on clearly defined stop shoulders located between the facing sides of the U-shaped legs of the lower bow. Because of this it is impossible for the securing means to act on the upper bow. Thus, the required relative movement between the upper and lower bows is assured.
A particularly advantageous embodiment of the securing means results if these are constituted by at least one tab-like wing having the stop shoulders, which is connected with one of its long sides with the hinge bolt inside the surface area and essentially extends tangentially in respect to the hinge bolt over the latter's surface area, if furthermore the wing has a length which is matched to the distance between the facing surfaces of the U-shaped legs of the lower bow and if furthermore a recess in the hinge bolt, which extends past the length of the wing, is associated with the wing, into which the free end of the wing can be completely inserted.
A particularly secure hinged connection between the upper and the lower bow is achieved if, in respect to its length, two tab-like wings are disposed on the hinge bolt, wherein one recess in the hinge bolt is associated with each wing.
The two tab-like wings are suitably disposed in two spaced apart planes which are parallel with each other.
Advantages in manufacturing the hinge bolt result if, from the direction of their origin on the hinge bolt, the wings extend toward the same side.
Further advantageous embodiments and improvements of the invention are recited in the dependent claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1, a partial lateral view of a wiper blade placed on a windshield of a motor vehicles,
FIG. 2, a section through a hinged connection between support bows which are part of the support bow system of the wiper blade, wherein the hinge is embodied in accordance with a first embodiment,
FIG. 3, a section analogous to FIG. 2 through a differently designed hinged connection,
FIG. 4, an enlarged view of the hinge bolt which is part of the hinged connection,
FIG. 5, a section along the line V--V through the hinge bolt in accordance with FIG. 4,
FIG. 6, a top view of the hinge bolt in accordance with FIG. 4,
FIG. 7, a section in accordance with FIG. 5 through a differently designed hinge bolt,
FIG. 8, an enlarged view of a section along the line II--II in FIG. 1 through a further embodiment of the hinge, wherein the hinge bolt in accordance with FIG. 4 is in an intermediate assembly position,
FIG. 9, a partial section through the arrangement in accordance with FIG. 8 along the line IX--IX,
FIG. 10, the hinge in accordance with FIG. 8 with the assembly of the hinge bolt completed, and
FIG. 11, a partial section through the arrangement in accordance with FIG. 10 along the line XI--XI in FIG. 10.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A wiper blade 10, with which a multi-link elongated support bow
REFERENCES:
patent: 1416700 (1922-05-01), Fenicle
patent: 4793020 (1988-12-01), Stratton et al.
patent: 4795288 (1989-01-01), Sakai
patent: 5271122 (1993-12-01), Roth et al.
Mayer Jurgen
Merkel Wilfried
Pollaris Eric
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
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