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. 11, 2001
Filed:
Nov. 09, 2000
Applicant:
Inventor:
James Edward Seiferling, Rio Vista, CA (US);
Assignee:
Barrier Systems, Inc., Rio Vista, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D 1/00 ; B62D 1/24 ;
U.S. Cl.
CPC ...
G05D 1/00 ; B62D 1/24 ;
Abstract
A system for use in guiding a vehicle on a roadway along an elongated guide member emitting a magnetic field includes an upper sensor and a lower sensor connected to the vehicle. The lower sensor detects a magnetic field emitted by the elongated guide member and an ambient magnetic field. The upper sensor detects only the ambient magnetic field. The signals produced by the detectors are processed to subtract the signal from the upper sensor of that of the lower sensor to produce a steering signal for transmission to an automatic steering system on the vehicle.