PRESSURE INTENSIFIER FOR WINDSHIELD WIPERS

• US 3,685,086 A
• Filed: 08/05/1970
• Issued: 08/22/1972
• Est. Priority Date: 09/29/1969
• Status: Expired due to Term

• Current Assignee: Karl Frohlich
• Original Assignee: Karl Frohlich
• Inventors: Frohlich, Karl
• Primary Examiner(s): Feldman, P.
• Application Number:
  US05/061,232
• Time in Patent Office: 748 Days
• Field of Search: 15/250,250.2,250.35,250.42
• US Class Current: 15/257.01
• CPC Class Codes: B60S 1/0408 Means for influencing the aerodynamic quality of wipers, e.g. clip-on wind deflectors B60S1/32 takes precedence

Abstract

A pressure-intensifying attachment for windshield wipers has a base plate, in the shape of a generally trapezoidal strip, which clamps onto a wiper arm and carries on its exposed surface a set of transverse wind-catching ribs progressively increasing in height from the narrow end to the wide end of the strip. The clamping unit comprises a bar of substantially triangular crosssection, integrally joined along one edge to the rear surface of the plate, bearing with the apex of its triangular profile upon the engaged wiper arm which is bracketed by upstanding flanges of a guide rail rigid with that rear surface.

Claims

1. A pressure-intensifying attachment for a windshield wiper, comprising and elongate base plate of generally trapezoidal shape with a wider end and a narrower end, clamping means on one surface of said plate for fastening it to a wiper arm, and a set of transverse ribs on the exposed opposite surface of said plate, said ribs being of swallow-tail configuration.

2. An attachment as defined in claim 1 wherein said ribs increase progressively in height from said narrower end to said wider end.

3. An attachment as defined in claim 1 wherein said Ribs are rounded at their junctions with said plate.

4. An attachment as defined in claim 1 wherein said clamping means comprises a guide rail extending longitudinally on said one surface, said rail having upstanding flanges bracketing said wiper arm, and a pressure bar integral with said plate overhanging said rail, said bar being of generally triangular cross-section with a bearing ridge at the apex of the triangle confronting said plate.

5. An attachment as defined in claim 4 wherein said bearing ridge is offset from the centerline of said rail toward the free edge of said bar.

6. An attachment as defined in claim 5 wherein said bar is provided at its attached edge with a holding lug overlying and projecting beyond the adjoining flange of said rail.

7. An attachment as defined in claim 4 wherein the flange of said rail next to the free edge of said bar is inwardly beveled.