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. 21, 1989
Filed:
Dec. 15, 1987
Marvin G Rains, Tualatin, OR (US);
Gunderson, Inc., Portland, OR (US);
Abstract
An improved single manual brake operating system for connecting the brake equipment of a plurality of wheeled railroad freight car trucks. The system provides for initial rapid takeup of slack in the linkages interconnecting the braking mechanisms for several trucks and thereafter supplies force with a greater mechanical advantage as the brake shoes are forced against the wheels of the railway car. This variably applied take-up force is accomplished using a system of noncircular sheaves to which flexible portions of the handbrake operating linkage are attached in such a manner that initial rotation of the take-up sheave is accomplished through a relatively long effective axis of rotation of the sheave and thereafter through a shorter effective axis of rotation.