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. 02, 1990
Filed:
Dec. 22, 1988
Applicant:
Inventor:
Richard A Carlstedt, Wheaton, IL (US);
Assignee:
Miner Enterprises, Inc., Geneva, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61G / ; B61G / ;
U.S. Cl.
CPC ...
213 33 ; 213 / ; 267202 ;
Abstract
The draft gear includes: friction elements; coil spring elements; and elastomer elements. With respect to the friction elements, three groups of friction surfaces are defined each of which create a specific angle with respect to a centerline passing down the center of the draft gear. The elastomer elements are interconnected multiple segmented columns having specific heights and occupying particular volumes with respect to the coil spring elements. Particular hardness and number of segments of the elastomer elements are also defined.