Apparatus for preventing turning-in and transmitter for vehicle

Details Apparatus for preventing turning-in and transmitter for vehicle Apparatus for preventing turning-in and transmitter for vehicle

1989-04-17

1991-08-27

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367901, H04B 1700

Patent

active

050439545

ABSTRACT:
An apparatus for preventing a direct turning-in of the supersonic wave from the opening of the sender to the opening of the receiver in a supersonic wave device for a vehicle in which an object placed near the vehicle body id detected by the supersonic wave. A cylindrical turning-in preventive member made of foamed material having discrete bubbles is arranged at the opening of the sender or the receiver.

REFERENCES:
patent: 3296586 (1967-01-01), Midlock et al.
patent: 3928777 (1975-12-01), Massa
patent: 4155066 (1979-05-01), Galvin
patent: 4463453 (1984-07-01), Cohen et al.
patent: 4695985 (1987-09-01), Takeoka
patent: 4739860 (1988-04-01), Kobayashi et al.
patent: 4796726 (1989-01-01), Kobayashi et al.
patent: 4944336 (1990-07-01), Stembridge et al.

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