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.

Date of Patent:
Jul. 31, 1990

Filed:

Apr. 24, 1989
Applicant:
Inventors:

Masayasu Arakawa, Sayama, JP;

Teruhisa Katsumata, Sayama, JP;

Yoshimasa Ota, Sayama, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B61B / ;
U.S. Cl.
CPC ...
104137 ; 1041723 ; 104287 ; 414495 ;
Abstract

A conveying carrier is arranged to be self-propelled and move along a conveying passage having a pit formed therebelow. A track covers the top side of the pit flush with the road surface of the conveying passage. A plurality of wheels are attached to the conveying carrier with at least the front wheels being casters. A steering frame is pivotally supported on the conveying carrier and is turnable about a vertical steering axis line. A driving wheel and motor are attached to the steering frame, with the driving wheel being positioned to contact the track at a location substantially directly below the vertical steering axis line. A guide member is guided by a guide rail laid in the pit and connected to the steering frame through a slit in the widthwise center of the track. The pit is a substantially U-shaped track frame buried in the widthwise central portion. The track is formed of a pair of cover plates which are detachably mounted on the upper ends of side plates on both sides of the track frame as to leave the slit therebetween.


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