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:
Jan. 10, 1978
Filed:
Jul. 02, 1976
Herbert Scheffel, Groenloof, ZA;
South African Inventions Development Corporation, Pretoria, Transvaal, ZA;
Abstract
A damping suspension for a railway truck having load-bearing members supported on at least two live wheelsets which are self-steering and which are directly interconnected to couple their yawing movements in opposite senses. The wheelsets are self-steering in that they each have profiled treads of high effective conicity and each is suspended by resilient elements having a low elastic yaw constraint to the load-bearing members. The yaw constraints imposed by the resilient elements are lower than the steering forces generated on the wheelsets on curved track as a result of the tread profile. The coupling between the wheelsets takes the form of diagonally connected resilient members for ensuring that the wheelsets do not oscillate in phase with the load-bearing members to thereby damp any hunting oscillations that may tend to occur.