US 4,625,359 AGranted

Windshield wiper unit

AssigneesSWF-Spezialfabrik fur Autozubehor Gustav Rau GmbH, Daimler-Benz Aktiengesellschaft

InventorsBruno Egner-Walter, Eckhardt Schmid, Wolfgang Scholl, Anton Epple, Hans Trube, Martin Pfeiffer, Josef Berger, Egon Frey

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Abstract

A windshield wiper unit with a wiper arm of telescopic construction which has a housing driven to and fro round an axis of rotation by a driving motor and a slide movable in relation to the housing, this slide being displaceable by a crank assembly is so designed that the various bearings are subjected to little load and so that compact construction is possible. This is achieved by having the connecting rod belonging to the crank assembly above or below the slide and linked to the slide between the two bearings for it and by having the distance between the two bearings at least as great as the stroke of the slide.

Claims34

Dependent claims

A windshield wiper unit with a wiper arm of telescopic construction comprising:

a housing adapted to be driven by a driving motor to and fro about an axis of rotation;
a slide having rear and front ends movable in a telescopic fashion through a stroke distance in relation to said housing;
front and rear bearings disposed in said housing for supporting said slide;
said slide having a length at least as long as the distance between said front and rear bearings plus the stroke distance of said slide;
a connecting rod coupled to said slide;
a crank coupled to said connecting rod, said crank having a fixed axis of rotation, said crank and said connecting rod being movable to displace said slide in said telescopic fashion;
said connecting rod being positioned above or below said slide and coupled to said slide betweeen said front and rear bearings at a point spaced from the rear end of said slide;
and
wherein said distance between said front and rear bearings is at least as great as said stroke distance.

6 more elements

A windshield wiper unit with a wiper arm of telescopic construction comprising:

a housing adapted to be driven by a driving motor to and fro about an axis of rotation;
a slide movable through a stroke distance in a telescopic fashion in relation to said housing;
front and rear bearings disposed in said housing for supporting said slide;
said slide having a length at least as long as the distance between said front and rear bearings plus the stroke distance of said slide;
a connecting rod coupled to said slide;
a crank coupled to said connecting rod, said crank having a fixed axis of rotation, said crank and said connecting rod being movable to displace said slide in said telescopic fashion;
said connecting rod being positioned above or below said slide and coupled to said slide betweeen said front and rear bearings;
wherein said distance between said front and rear bearings is at least as great as said stroke distance;
and
a guide for absorbing torsional forces operating on said slide to prevent twisting of said slide,
said guide including two guide elements disposed on opposite sides of said slide and carried on a support, said support bearing arranged approximately in a plane lying parallel to the plane of movement of said crank and being fixed in its middle to said slide in a non-rotatable manner.

8 more elements

Dependencies are inferred from the claim text.