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:
Nov. 09, 1976
Filed:
Oct. 01, 1975
George B Baron, Marion, OH (US);
Marion Power Shovel Company, Inc., Marion, OH (US);
Abstract
A crowd system for a power shovel having a front end assembly including a dipper mounted on a body, and means mounted on the body and operatively connected to the front end assembly for hoisting and lowering the dipper, comprising a mast pivotally connected at a lower end thereof to the body, at least one connecting link pivotally connected at opposite end thereof to the mast and the front end assembly, at least one support link pivotally connected at a lower end thereof to the body, a drive link pivotally connected at opposite end thereof to the mast and the support link, a gantry mounted on the body between the mast and the support link, at least one fluid actuated, piston and cylinder assembly pivotally connected at one end thereof to the gantry at a point elevated relative to a support platform of the body, and pivotally connected at the opposite end thereof to the drive link, and means for selectively supplying fluid under pressure to the opposite ends of the cylinder of the piston and cylinder assembly to correspondingly extend and retract such assembly.