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. 13, 1983
Filed:
Sep. 08, 1981
Herman J Maurer, Burlington, IA (US);
Carl O Pedersen, Burlington, IA (US);
J. I. Case Company, Racine, WI (US);
Abstract
An improved hydraulic swing mechanism for a material handling implement, such as a backhoe, includes a multi-position, hydraulic sequencing valve for directing the flow of hydraulic fluid to hydraulic motors which rotate the swing tower and boom of the implement. A unique valve operating mechanism is provided for selectively repositioning the sequencing valve as the boom and swing tower are rotated in order to improve the operating characteristics of the swing mechanism. The valve operating mechanism includes a pivoted, frame mounted actuating arm connected with the sequencing valve by a lost-motion linkage, and flexible linkages connecting the actuating arm with the hydraulic motors of the swing mechanism.