Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1997-08-21
1999-10-05
Warden, Robert
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
A47L 100
Patent
active
059605120
DESCRIPTION:
BRIEF SUMMARY
The invention pertains to a windshield wiper system with a noise-damping or vibration-damping attachment feature for attachment to a vehicle chassis according to the preamble of claim 1.
From DE 4,036,367 A1 a preassembled windshield wiper system is known whose motor support plate and wiper bearing housing is equipped with attachment features for noise-damping or vibration-damping attachment to the vehicle chassis. The wiper bearing housing has a lateral molded protrusion that has an attachment section with a passage opening. At the edge of a motor support plate which belongs to the windshield wiper system there is likewise an attachment section with a passage opening. There is a hollow, cylindrical damping element made of resilient material and having an annular groove running along its outer perimeter in the passage openings of the aforesaid attachment sections. The ring groove is located roughly in the longitudinal center of the damping element. There is a metal bushing used to hold an attachment bolt or an attachment screw installed in the central passage opening of the damping element.
A disadvantage of these known attachment features is that the insertion of the damping elements into the attachment sections and of the casing into the damping elements has to be done manually and thus represents a cost-intensive and complicated assembly process.
From DE 3,903,976 A1 another preassembled windshield wiper system is known which contains a motor support unit produced as a pressure-cast article. Molded onto the motor support unit is a lateral attachment eyelet, designed to be open at one edge so that a resilient damping element of the kind described in DE 4,036,367 A1 can be inserted from the side into the passage opening. This design does indeed result in a simplification with regard to the insertion of the damping element into the passage opening of the attachment section, however, here too, the disadvantages stated above still apply.
Therefore the purpose of the invention is to refine a windshield wiper system of the type described above in such a manner that the noise-damping or vibration-damping attachment feature can be manufactured at low cost, while dispensing with a manual assembly of the damping element and of the casing to the attachment section.
According to this invention, the problem is solved by a windshield wiper system with the features of claim 1.
The basic idea underlying the invention consists in that the damping element, which is manufactured preferably as a rubbery element from elastomeric material, is cast or injected-molded directly into the relevant position for it in the attachment section of the corresponding support portion of the windshield wiper system. Or stated in other words, the damping element is cast or is injected immediately after its manufacturing process into the space between the required bushing and the passage opening of the attachment section. This method has the advantage that a complicated preliminary assembly by snapping a prefabricated damping element into the passage opening of the attachment section and the installation of the bushing into the passage opening of the damping element can be omitted.
Because the bushing is manufactured as a single piece together with the attachment section or the corresponding component of the windshield wiper system which has the attachment section, there is a cost advantage with respect to the manufacture of this part of the windshield wiper system, and the insertion of a separate bushing into a corresponding molding tool for the purpose of casting or injection with the damping element can be omitted. The ridge or the ridges which connect the bushing as a single piece to the attachment section are essentially intended to hold the bushing in its predefined position for the injection of the damping element. In order, on the other hand, to prevent the transfer of solid-borne sound or vibrations, which will occur during operation of the windshield wiper system to the bushing and thus to the vehicle chassis, the ridges must be con
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Ortale Alessandro
Schael Oliver
Aldag Andrew
ITT Manufacturing Enterprises Inc.
Lewis J. Gordon
Warden Robert
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