×

Ultrasonic rangefinder

  • US 4,739,860 A
  • Filed: 05/28/1985
  • Issued: 04/26/1988
  • Est. Priority Date: 05/29/1984
  • Status: Expired due to Term
First Claim
Patent Images

1. An ultrasonic rangefinder comprising:

  • ultrasonic wave transmitting means having a transmitting surface,ultrasonic wave receiving means having a receiving surface,at least one of the wave transmitting means and the wave receiving means further including;

    (a) a horn; and

    (b) a straight tubular section provided between at least one of the transmitting surface and receiving surface and said horn, said straight tubular section being shaped to satisfy the condition x=k(r2

    )wherein x is the length of the straight tubular section, r is the radius of the at least one of the transmitting surface and receiving surface, λ

    is the wave length of the ultrasonic wave signal and k is a constant.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×