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:
Aug. 16, 1977
Filed:
Sep. 09, 1975
Applicant:
Inventor:
Robert Michel, Paris, FR;
Assignee:
Transports-Recherches-Etudes et Groupement d'Interet Economique (Tregie), Rueil-Malmaison, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01B / ; E01B / ;
U.S. Cl.
CPC ...
104130 ; 104141 ; 1042441 ; 104245 ;
Abstract
In a vehicle guidance system, a circular-section guidance rail is embraced y a detector on a vehicle. At a fork, where the rail progressively broadens prior to dividing, the rail height is reduced so that a detector, when tilted to select one branch of the fork, has its lowered side between the rail and a side wall of a channel in which the rail is mounted and its raised side riding over the broadened rail.