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Fluid isolation and dispersion system for tactile input devices

  • US 5,681,122 A
  • Filed: 02/20/1996
  • Issued: 10/28/1997
  • Est. Priority Date: 02/20/1996
  • Status: Expired due to Term
First Claim
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1. A system for isolating a fluid from a keypad comprising:

  • a flexible gasket member including raised portions, wherein the gasket member overlies a printed circuit board containing elastometric conductors and the raised portions contain keys that impact the elastometric conductors when struck by a user;

    a top cover over the flexible gasket member containing a plurality of apertures defined by aperture walls through which the raised portions protrude;

    wherein the raised portions form a seal between the keys and the aperture walls; and

    a plurality of linking walls which link predetermined aperture walls to form a plurality of chambers on top of the flexible gasket member;

    wherein predetermined linking walls and predetermined portions of predetermined aperture walls form a periphery wall around the aperture walls, wherein the flexible gasket member further comprises a flexible periphery wall around the periphery of the gasket member, and wherein the periphery wall and the flexible periphery wall are separated by a predetermined distance to form a channel.

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