Windshield wiper blade made of synthetic material, with the supporting structure formed as an integral element

• US 3,881,214 A
• Filed: 08/31/1973
• Issued: 05/06/1975
• Est. Priority Date: 09/09/1972
• Status: Expired due to Term

• Current Assignee: Fister SPA
• Original Assignee: Attilio Dal Palu
• Inventors: Palu, Attilio Dal
• Primary Examiner(s): Feldman, Peter
• Application Number:
  US05/393,687
• Time in Patent Office: 613 Days
• Field of Search: 15/250.32,250.33,250.34,250.35,250.42
• US Class Current: 15/250.48
• CPC Class Codes: B60S 1/3806 Means, or measures taken, for influencing the aerodynamic quality of the wiper blades
• CPC Class Codes: B60S 1/3881 in additional element, e.g. spoiler
• CPC Class Codes: B60S 1/3882 C-shape section
• CPC Class Codes: B60S 1/40 Connections between blades and arms
• CPC Class Codes: B60S 1/4064 the channel-shaped end being provided with protrusions on, or holes in, the side walls to create a pivot
• CPC Class Codes: B60S 1/4083 for arms provided with a flat end

Abstract

A windshield wiper blade made of a thermoplastic material and having the supporting structure formed as an integral element is described. The main feature of this windshield wiper blade is that of having the supporting structure provided with inner reliefs which enable the windshield wiper blade to be conveniently deformed during the use. Along the supporting structure there is also arranged a metal element, resiliently deformable, so that in its rest position, and even at high temperature values, the windshield wiper blade is caused to assume always the same configuration.

Claims

1. Windshield wiper blade, comprising a supporting structure having fixed on it a rubber element provided with an active edge which is apt to slide on the glass, said supporting structure being hinged to an attachment element which is apt to be fixed to a driving arm of the windshield wiper device, said supporting structure having a substantially constant cross section, and in the lower portion of said supporting structure being formed a continuous channel having a T-shaped cross section, in the interior of which channel being accomodated a corresponding projection of said rubber element, also having a T-shaped cross section, and in the upper wall of said continuous channel being formed a plurality of inner recesses or reliefs, said recesses presenting a height decreasing progressively as they approach the ends of said supporting structure, and the distance between two adjacent recesses being also decreasing progressively as they approach said ends, said recesses allowing the supporting structure to be deformed substantially in directions contained within the center line plane passing through said windshield wiper blade and said active edge of the rubber element,

2. The windshield wiper blade of claim 1, wherein said supporting structure is made of a thermoplastic material.

3. The windshield wiper blade of claim 1 wherein said channel of the supporting structure comprises, in correspondence with each end of said supporting structure, a short channel section which has a substantially rectangular cross section and is apt to allow the insertion of said projection of the rubber element into said T-shaped channel.

4. The windshield wiper blade of claim 1, wherein along the longitudinal axis of that portion of said supporting structure which supports said rubber element, there is arranged a metal element which is resiliently deformable, so that said portion of said supporting structure, in its rest position, and even at high temperature values, is caused to assume always substantially the same configuration.

5. The windshield wiper blade of claim 4, wherein said metal element has the shape of a lamination having a rectangular cross section.

6. The windshield wiper blade of claim 4, wherein said metal element has the shape of a rod.

7. The windshield wiper blade of claim 4, wherein said metal element is disposed between said T-shaped projection and the upper wall of said continuous channel.

8. The windshield wiper blade of claim 4, wherein the length of said metal element is substantially equal to the length of said continuous channel.