Sliding member, inner and outer blades of an electric shaver and film-forming method

  • US 6,354,008 B1
  • Filed: 09/21/1998
  • Issued: 03/12/2002
  • Est. Priority Date: 09/22/1997
  • Status: Expired due to Term
First Claim
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1. An electric shaver outer blade having at least one bore formed therein defining a hole for catching a beard, and a sliding surface for sliding contact with an electric shaver inner blade on an inner surface region around said hole for catching the beard, said sliding surface projecting toward said inner blade and having a protective film deposited not only on said sliding surface but also on an outer surface region around said hole in such a manner that d1/d2 is controlled to be within a range of 1.1-3.3 where d1 is a thickness of the protective film deposited on the sliding surface and d2 is a thickness of the protective film deposited on said outer surface region, the protective film comprising a hard carbon film formed of a diamond and/or amorphous carbon containing a diamond structure and wherein the protective film having a thickness d1 is disposed across the entire sliding surface of the outer blade during operation, said entire sliding surface being flat.

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