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:
Jun. 26, 1990
Filed:
Jul. 05, 1988
Ryohei Motegi, Hiratsuka, JP;
Yoichi Hirokawa, Kamakura, JP;
Yukio Yoshida, Yokohama, JP;
Junichi Furuki, Tokyo, JP;
Tetsuya Ishii, Narashino, JP;
Isao Takiguchi, Tokyo, JP;
Hiroshi Kono, Urawa, JP;
Takehiko Suyama, Ayase, JP;
Tomohiro Gocho, Ibaraki, JP;
Satohiko Tanaka, Matsudo, JP;
Narimasa Yamabe, Saitama, JP;
Yoshimitsu Hashimoto, Higashimurayama, JP;
Tokyo Keiki Co., Ltd., Tokyo, JP;
Abstract
An access alarming method and apparatus for activating an alarm in the event of the access of a working vehicle, such as a road roller, to an object, such as a worker, in the same working area as the vehicle. An ultrasonic wave transmitted by a transmitter on the object is received by a receiver on the vehicle. The received signal is processed and used to determine the relative position of the vehicle with respect to the object. An alarm is activated, and/or the vehicle is braked when it is judged that the object is within a hazard area determined in relation to the position and course of the vehicle.