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:
Oct. 30, 1979
Filed:
Oct. 25, 1977
Ronald W Marsh, Michigan City, IN (US);
Pullman Incorporated, Chicago, IL (US);
Abstract
A door retarder to prevent movement of an unlocked railway freight door includes a spring urging a braking cam roller into a pivoted braking shoe that engages a door support rail. An operating handle has a double lobe cam to operate a linkage and move the braking cam roller away from the braking shoe to allow the door to move freely into and from a car door opening when the operating handle is rotated from a normal, upright position. When released, the operating handle returns to the normal position for retarding door movement.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile