Frameless interior rearview mirror assembly

  • US 10,124,732 B2
  • Filed: 05/01/2017
  • Issued: 11/13/2018
  • Est. Priority Date: 04/23/2009
  • Status: Active Grant
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First Claim
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1. An interior rearview mirror assembly for a vehicle, said interior rearview minor assembly comprising:

  • a mirror casing;

    a prismatic interior reflective element;

    wherein said prismatic interior reflective element comprises a wedge-shaped glass substrate having a first surface and a second surface and a perimeter edge about a periphery of said wedge-shaped glass substrate and extending between the first and second surfaces thereof, said wedge-shaped glass substrate having a mirror reflector established at the second surface thereof, the first surface facing a driver of a vehicle when said interior rearview mirror assembly is normally mounted in a vehicle equipped with said interior rearview mirror assembly;

    wherein a front surface of the perimeter edge provides a smooth curved transition at the perimeter edge between a perimeter region of the first surface of said wedge-shaped glass substrate and said mirror casing;

    said perimeter region circumscribing said wedge-shaped glass substrate;

    wherein the front surface of the perimeter edge comprises a rounded curved surface disposed between the first surface of said wedge-shaped glass substrate and said mirror casing;

    wherein the radius of curvature of the front surface of the perimeter edge is at least 2.5 mm;

    wherein no portion of said mirror casing encompasses the first surface of said wedge-shaped glass substrate; and

    wherein an outer part of the perimeter edge of said wedge-shaped glass substrate is co-planar with an outer part of a side wall of said mirror casing.

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