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:
Dec. 14, 1982
Filed:
Sep. 11, 1980
Applicant:
Inventor:
Harry W Mulcahy, Griffith, IN (US);
Assignee:
AMSTED Industries Incorporated, Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61F / ; B61F / ; B61F / ;
U.S. Cl.
CPC ...
1052 / ; 1052241 ;
Abstract
In a railroad car truck an elastomeric device is used to operatively connect each axle end of the wheelsets to a respective pedestal jaw of the side frames. The elastomeric device may comprise an elastic pad affixed between two metal plates. By choosing an elastic material having a relative high stiffness in shear, movements between the wheelsets and side frames are cushioned while at the same time the wheelsets and side frames are held in a substantially squared relationship. The squared relationship improves the dynamic stability of the truck by increasing its critical speed to allow higher speed travel.