The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 1983
Filed:
Jun. 30, 1981
Applicant:
Inventors:
Assignee:
Nippon Soken, Inc., Nishio, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08G / ;
U.S. Cl.
CPC ...
340 32 ; 340 34 ; 340 70 ; 367909 ;
Abstract
A rear obstacle detecting system for automotive vehicles includes an ultrasonic transmitter/receiver unit, distance detecting unit and an indicator for measuring distance to an obstacle while a vehicle is in backward movement. The ultrasonic transmitter/receiver unit having a ultrasonic vibrator is always energized as long as the vehicle is in an operating condition irrespective of whether the vehicle is in a backward movement or not, in order to maintain the ultrasonic vibrator being vibrated to achieve a self-cleaning function. The indicator is energized only when the vehicle is in backward movement.