Autonomous vehicular appliance, especially vacuum cleaner

  • US 6,671,592 B1
  • Filed: 06/18/2001
  • Issued: 12/30/2003
  • Est. Priority Date: 12/18/1998
  • Status: Expired due to Term
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First Claim
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1. An autonomous vehicular appliance, comprising at least two types of threshold locators having differing transmitting signals and being capable of defining at least part of a boundary of an area within which the autonomous vehicular appliance is to be confined at least temporarily, a navigation system for navigating the appliance around the area and a detection system to allow the appliance to detect the presence of the threshold locators,the detection system comprising means for receiving a signal from at least one each of the two types of threshold locators, and wherein the appliance is configured to use a received signal to detect parts of the boundary defined by the threshold locators, and upon detecting a first type of threshold locator, to prevent itself from crossing the part of the boundary marked by the first type of threshold locator and, upon detecting a second type of threshold locator, to prevent itself from crossing the part of the boundary marked by the second type of threshold locator until a certain condition has been met.

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