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Automatic faucet

  • US 5,918,855 A
  • Filed: 11/01/1995
  • Issued: 07/06/1999
  • Est. Priority Date: 12/20/1993
  • Status: Expired due to Term
First Claim
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1. An automatic faucet having a hand sensor for detecting presence or absence of hands within a hand washing space to start and stop discharging water from a water discharge opening automatically, the hand sensor comprises:

  • a transmitter for transmitting a signal wave to a transmission region directed toward the hand washing space;

    a receiver for receiving a signal wave reflected from a reception region directed also toward the hand washing space;

    a detection region being formed by a partial overlapping portion of both the transmission region and a reception region, and at least one of said wave of said transmission region and of said receiving region being adjusted to intersect a stream of water discharged from the water discharge opening, and said transmission region and said receiving region being adjusted to be roughly in parallel with each other.

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