Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1992-01-20
1994-05-03
Hornsby, Harvey C.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525036, 15245, B60S 138
Patent
active
053075366
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention is concerned with a windshield wiper arm for a motor vehicle.
A windshield wiper arm essentially consists of a rubber wiping strip which is connected to a driving arm through a structure which serves as a support, and the main function of which is to ensure the best possible wiping action by giving the wiping strip a spatial configuration which is always adapted to the curvature of the glass to be wiped and to the conditions in which it is to be used.
To this end, the known support structures comprise a rigid, metallic, main arm which is fixed to the free end of the driving arm, together with one or more arms which are articulated together and/or to the main arm, and some of which carry the wiping strip, while the latter may include reinforcing inserts which give it predetermined mechanical properties of transverse stiffness and/or longitudinal flexibility.
The assembly is thus very complex, and necessitates assembly operations, usually by crimping, which are lengthy and costly, with the quality of these operations having a direct influence on the performance and good operation of the windshield wiper.
By way of example, a windshield wiper arm operating over a length of 60 centimeters generally comprises a dozen components.
In addition, this design of windshield wiper arm has the effect of making each model that is produced different from the others, in terms of either the nature and dimensions of their components or of their number and method of assembly. As a result, large stocks have to be carried by the manufacturers, and it is impossible to rationalise mass production.
In order to reduce manufacturing costs, which are also due to the operations required to protect the product against corrosion, and operations of painting metallic components, it has been proposed to make these components out of plastics material, but the appearance of such an assembly is thought unfavourable to its commercial exploitation because customers see it as being a product of inferior quality.
SUMMARY OF THE INVENTION
An object of the invention is to propose a new design of windshield wiper arm which enables all these problems to be overcome.
To this end, the invention proposes a windshield wiper characterised in that the structure constituting a support for the wiping strip comprises a profiled member in one piece, to which the driving arm is connected and which directly receives the wiping strip which in turn includes a hollow coupling portion integral with the wiping strip and extending over substantially the whole length of the wiping strip, with the profiled member being received in the coupling portion.
In accordance with further features of the invention: section, the parallel branches of which enclose the corresponding faces of the profiled member; and is received in the hollow portion in such a way as to define an internal chamber having a substantially rectangular cross section; parallel to the general plane in which the wiping strip extends; with the profiled member; longitudinal ribs which are formed on the inner faces of the parallel branches of the hollow coupling portion, together with complementary longitudinal grooves formed on the corresponding opposed faces of the profiled member; intermediate portion in the form of a bellows, the folds of which extend longitudinally; and especially with expanded polyurethane foam; continuous lengths; profiled member is a portion of a product of extruded plastics material; and mould prior to its assembly with the portion constituting the wiping strip .
BRIEF DESCRIPTION OF THE DRAWINGS
Further features and advantages of the invention will appear on a reading of the detailed description that follows, for the understanding of which reference will be made to the annexed drawings, in which:
FIG. 1 is a view in transverse cross section taken on the line 1--1 in FIG. 2, of a windshield wiper arm in accordance with the invention;
FIG. 2 is a perspective view of a windshield wiper arm in accordance with the invention; and
FIG.
REFERENCES:
patent: 2011015 (1935-08-01), Schleicher
patent: 3048872 (1962-08-01), Kerrigan
patent: 3099031 (1963-07-01), Ludwig
patent: 3545028 (1970-12-01), Poland
patent: 4123817 (1978-11-01), Hartery
Graham Gary K.
Hornsby Harvey C.
Paul Journee S.A.
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