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. 12, 1978
Filed:
Nov. 14, 1977
Applicant:
Inventors:
Edward D Duke, Chicago, IL (US);
Joan M Riordan, Glenview, IL (US);
Assignee:
International Harvester Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B60P / ; B65G / ;
U.S. Cl.
CPC ...
37-8 ; 198813 ; 198816 ; 7424 / ;
Abstract
A chain tension maintenance device for use with the bowl loading elevator of the excavating scraper variety which is adjustable to vary the slack in the chain and paddle structure. At least one idler arm having bell crank geometry is pivotally mounted to the elevator frame through a first pivot point. An idler wheel axially mounted at a second pivot point of the idler arm, is urged into tension maintaining contact with the elevator chains by force exerted through the third pivot point of the idler arm by an adjustable turnbuckle grounded to the elevator frame.