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Wiper blades, spring elements and articles including such spring elements

  • US 4,976,001 A
  • Filed: 11/04/1988
  • Issued: 12/11/1990
  • Est. Priority Date: 11/07/1987
  • Status: Expired due to Fees
First Claim
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1. A wiper blade assembly comprising an elongate flexible spine from which projects an elongate blade extending along the length of the spine for wiping a surface, wherein the spine has a number of pairs of opposed abutment faces spaced apart along at least a part of the length of the spine and which move toward and away from each other with flexing of the spine, and resilient biasing means interposed between said opposed abutment faces, said spine and blade, with said resilient biasing means interposed between said abutment faces, having a curved configuration when said spine and blade are not subjected to any external force, and said spine having an inherent tendency to return to a less curved state whereby said biasing means is in a precompressed state when said wiper blade assembly is not subjected to any external force, and said biasing means resisting a reduction in curvature of the spine and blade so that when the blade assembly is pressed towards a surface of lesser curvature, the resultant stressing of the biasing means holds the blade against the surface.

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