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:
Jun. 22, 1976
Filed:
Feb. 12, 1975
Ray L Ferris, Thornton, IL (US);
Walter J Marulic, Gary, IN (US);
Pullman Incorporated, Chicago, IL (US);
Abstract
A fifth wheel plate assembly for a trailer hitch for securing trailers to railway flat cars includes a top plate having an opening in which a movable clamp or lock jaw is supported for grasping and locking the kingpin of a trailer to the fifth wheel. The lock jaw is provided with slidable extensions which are engaged by a lock screw mounted below the fifth wheel plate and which moves the lock jaw between open and closed positions. When in a closed position a slidable bolt assembly is movable transversely of the extensions into keeper openings within the extensions for maintaining the locking jaw in its closed position. The locking bolt is slidable in a tube provided with a diagonal recess which accommodates the stem of a manually operated handle for sliding the locking bolt. A flag or indicator is pivotally mounted underneath the top plate on an axis parallel to the axis of the locking bolt. The indicator includes an arm at one end and a flag at the other end. When the bolt is in a locked position relative to the keepers on the extension the flag is visible having pivoted by gravity to a lowered position and when the bolt is in an unlocked position the flag is out of sight shielded to the view of the operator.