Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1983-03-31
1985-02-05
Feldman, Peter
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525035, B60S 140
Patent
active
044970846
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to windscreen-wipers, in particular for motor vehicles.
It is known that glazed surfaces which have been sprayed have to be subjected to the action of windscreen-wipers, which generally have an alternate wiping movement, when it is desired to maintain good visibility through the said surfaces. The action of the windscreen-wipers on the surface to be wiped is performed by means of a windscreen-wiper blade driven by a motor mechanism by means of a windscreen-wiper element ensuring the mechanical connection between the windscreen-wiper blade and the drive mechanism. More specifically, the drive mechanism comprises a rotating shaft on which there is mounted an assembly head articulated by a cylindrical articulation with respect to a casing rigid with a windscreen-wiper arm. A resilient system is interposed between the casing and the above head so as to maintain a resilient bearing of the windscreen-wiper blade on the surface to be wiped when the windscreen-wiper is in operation.
In the French patent application 79-19195 filed on 25th July 1979 there is disclosed a windscreen-wiper element in which the resilient system interposed between the casing and the above head is a resilient means operating under compression; this windscreen-wiper element comprises a cylindrical articulation provided between the head and the above casing, a helical compression spring bearing, on the one hand, on a member connected to the above head by a shaft parallel to that of the shaft for articulating the head on the casing and, on the other hand, on a part which is rigid with the casing, the said member being conncted to the housing by a connection enabling free sliding; the above member is a plate, the level of which is substantially perpendicular to its shaft for articulation with the head and the central region of which comprises a recess for accomodating a spring; the connection, which ensures that the plate may slide freely with respect to the casing, is provided with means which support the action of the spring and prevent it being moved perpendicular to the plate; the connection which enables the plate to slide freely with respect to the casing is constituted by a slot provided in the curved end of the windscreen-wiper arm which is rigid with the casing.
The windscreen-wiper element described in the above-mentioned French patent application is perfectly satisfactory for the windscreen-wipers of touring vehicles in which the resilient bearing force of the windscreen-wiper on the windscreen is relatively slight. On the other hand, a problem may arise when it is desired to use the device for larger vehicles, owing to the fact that the resilient bearing force to be exerted on the windscreen-wiper arm then becomes very great. In the device advocated with compression means interposed between the drive head and the casing exerts its entire action on the folded end of the windscreen-wiper arm connected to the casing; as the width of the windscreen-wiper arm is still relatively restricted there is the risk of deforming the end, of the windscreen-wiper arm, into a right-angle by the compression means.
The aim of the present invention is to overcome the disadvantage cited above and to propose an improvement to the windscreen-wiper elements described in the French patent application 79-19195. According to this improvement, the compression means interposed between the drive head and the casing exerts its action on a stop bracket which cooperates with projections provided on the internal face of the casing flanges. It has therefore been proposed, according to the invention, to provide on the lateral flanges of the casing stops for supporting the folded end of the arm on which end the force generated by the compression means is exerted.
If the casing is much greater than the windscreen-wiper arm connected thereto, the formation of stops on the lateral flanges of the casing involves very large raised portions being provided at the interior of the said casing; it results therefrom that large hollow regions have t
REFERENCES:
patent: 2799039 (1957-07-01), Oishei
patent: 3176336 (1965-04-01), Scinta
patent: 3427676 (1969-02-01), Riester
Equipements Automobiles Marchal
Feldman Peter
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