Distance measuring apparatus

  • US 7,131,216 B2
  • Filed: 08/25/2004
  • Issued: 11/07/2006
  • Est. Priority Date: 08/25/2004
  • Status: Expired due to Fees
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,wherein the frame comprises a bracket and the scraper assembly comprises a blade assembly that is separate from and attached to the bracket,wherein the blade assembly comprises an L-shaped body with a mounting leg that is attached to the bracket and a transverse cleaning leg on which the scraping edge is defined,wherein the cleaning leg has a thickness defined between first and second substantially planar surfaces and a free end surface that extends between the first and second planar surfaces,wherein the free end surface is non-orthogonal to the first and second planar surfaces and the scraping edge is defined at a juncture between the first planar surface and the free end surface.

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