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:
Feb. 27, 1990
Filed:
May. 27, 1988
Lloyd A Baillie, Plano, TX (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A tractor-trailer unit with a self steering semi-trailer characterized by a steerable bogie assembly includes elongated cables connected to the bogie assembly by way of a rotatable pulley, the cables being moved in response to a cam and lever arrangement, and a pair of opposed locking levers which are responsive to slack in one or the other of the cables to engage the pulley to prevent further turning movement of the bogie assembly in the direction of the slack cable. The pulley includes a set of circumferentially spaced apart pins which engage the respective locking members in an escapement action to allow the steerable bogie to be turned back toward a centered or aligned position with the trailer frame if one or both cable traces become slack.