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:
Jul. 16, 1991
Filed:
Dec. 06, 1989
Applicant:
Inventor:
Tim A Wellman, Coldwater, OH (US);
Assignee:
Crown Equipment Corporation, New Bremen, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
36442402 ; 318587 ; 180167 ;
Abstract
A wire guidance system for a materials handling vehicle, such as a turret stockpicker, detects an alternating signal carried by a buried wire by means of two sets of four sensors each carried at either end of the vehicle. An alarm, including both audio and visual means, having a first characteristic is generated if the vehicle is equipped with a functioning wire guidance system; an alarm having a second characteristic is generated when an active wire is detected and wire guidance has not been activated.