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:
Sep. 10, 1985
Filed:
Jun. 23, 1982
Erik R Larsen, Copenhagen, DK;
F. L. Smidth & Co., Cresskill, NJ (US);
Abstract
An apparatus for a raking device which illustratively includes a harrow, which moves along a bridge in a reciprocating direction and which includes a mechanism for ensuring that any motion of an apex of the harrow is substantially linear as the harrow moves throughout its entire range of travel, is described. Specifically, this mechanism is comprised of a flexible tension element which forms part of a hoist and is reeved between a stationary support and the harrow such that the effective length, of the part of the flexible tension element which determines the inclination of the harrow, is adjusted in direct response to the distance through which the harrow has moved along the bridge with respect to an end point of its travel.