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. 08, 1982
Filed:
Apr. 09, 1979
Applicant:
Inventors:
Carl E Tack, Elmhurst, IL (US);
Sergei G Guins, Okemos, MI (US);
Assignee:
TransDyne, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61F / ; F16F / ; F16F / ; F16F / ;
U.S. Cl.
CPC ...
1051 / ; 267-4 ; 267168 ; 267179 ;
Abstract
One or more of the springs supporting the bolster of a railway car truck is a two stage spring group comprising an outer coil and an inner coil disposed within and coaxial with the outer spring. A retainer is provided to hold the inner spring in relation to the outer spring. The retainer has helically arranged lugs or a flange in engagement with the outer coil at the lower end, and the retainer also includes a support surface for supporting the lower end of the inner coil.