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Distance measuring apparatus

  • US 20060042112A1
  • Filed: 08/25/2004
  • Published: 03/02/2006
  • Est. Priority Date: 08/25/2004
  • Status: Active Grant
First Claim
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1. A distance measuring apparatus comprising:

  • a frame;

    a wheel rotatable relative to the frame around a first axis;

    the wheel having a peripheral surface that can be rolled against a surface upon which a distance measurement is to be taken;

    a counter assembly through which advancement of the distance measuring device can be converted to a distance measurement; and

    a scraper assembly comprising a scraping edge that can be selectively fixed in a plurality of different positions relative to the frame so as to be one of (a) adjacent to the wheel, and (b) against the wheel, the scraping edge intercepting foreign matter adhered to the wheel as the wheel is rotated around the first axis to avoid buildup of foreign matter upon the wheel as the distance measuring apparatus is operated.

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