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, 1978
Filed:
Oct. 15, 1976
Applicant:
Inventor:
David G Anderson, Chesterton, IN (US);
Assignee:
Miner Enterprises, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61G / ;
U.S. Cl.
CPC ...
213 24 ; 213 / ; 213 34 ;
Abstract
A hollow plunger extends into the cavity of the draft gear body. The inner end of the plunger is expansible. One or more wedges are held by the body adjacent the inner end of the plunger, and shoes are positioned between the wedge(s) and the inner side of the inner end of the plunger. Spring elements positioned within the plunger are in compression between the outer end of the plunger and the shoes. When the plunger is forced into the body the shoes are wedged outwardly against the expansible portions of the plunger which in turn are forced into contact with the body. There may be one or a plurality of successive stages of wedges and shoes.